Research on the coefficient of sound absorption in turbid water
专业音响英文翻译
A 安培，电流的单位。
ABC 1、自动低音补偿。
2、自动亮度控制。
absolute pitch 绝对音调、绝对音高。
absorption coefficient 吸声系数absorption loss 吸收损失ac 交流电ac bias 交流偏磁ac voltage 交流电压accentuation 加重、提升access 接近、入口、存取accessory 附属的，附件（形容词）accesspries 附属的、附件、配件、附属设备accmpanimenl 伴奏accordion 手风琴accrescendo 渐强accumulator 1、蓄电池 2、累加器、存储器a-channel A通道acoustic 声学的、音响的acoustic backing 吸声衬垫acoustic box 助声箱acoustic color 音色acoustic effect 音响效果acoustic clasticty 声弹性acoustic feedback 声反馈acousticrefeneration 声波的一部分从声频放大系统同这个系统的前置部分或输入电路的机械耦合。
acoustic fidelity 声保真度acoustic filter 声过滤器acoustic generater 声发生器acoustic pressure 声压acoustic reflectivity 声反射率acoustic resonance 声共振acoustics 声学、音响学acoustic system 声系统acoustic trealment 声处理acoustic wave 声波acoustical couping 声耦合acoustical-electrical transducer 声-电转换器actinodielectric 光电介质actionoelectrictiy 光电效应actionoelectricity 光电action 动作、作用activtaion 激活、活化active 有功的、主动的、有源的actual sound 同期声A-D 模拟（电路）-数字（电路）abapter 接续器、连接头、适配器ADC模数转换器ADSR 这是合成器的包络波控制的四个阶段ADT 自动声迹（音）加倍A.DUB 声频复制、配音A.EDIT 自动编辑AES 声频工程师协会af 声频、音频afa 音频放大器A-fade 衰减AFC 自动频率控制AFL 调音台中指监听的声音处在衰减器后面的状态after sound 余音agc 自动增益控制age 老化A-IN 声频输入的缩写A-INSEL 声频输入的选择air coloum 空气拄alarm 告警、警报alc 自动电平控制alignment 调整、校准、校正alkaline cell 碱性电池allen screw 爱林螺钉 alligator 接线夹、鳄鱼夹alpha α值alternating current 交流电流alternating current/direct current 交流/直流alternating current erasing head 交流抹音头alternating votltage 交流电压alternation 半周期alternator 交流发电机altitude 高度alto 女低音am 调幅ambience 环境声音ambient noise 环境噪声ambient sound 环境声ambient temperature 环境温度ambiophony 主体混响、环境立体声amp 安培、安；放大器ampere 安培ampere-hour 安培小时amplification 放大amplifier 放大器amplitude 幅度、振幅amplitude distortion 幅度失真amplitude modulation 调幅、幅度调制analog 模拟analog signal 模拟信号analyser 分析仪、分析器anechoic 无回声的、消声anechoic enclosure 无回声密闭室、消声室anechoic room 无回声室、消声室angle 角、相角angle of incidence 入射角angle of lag(or lerd) 滞后角（或超前角）angular frequency 角频率ANL 自动嗓声限制anode 阳极anode current 阳极电流anodevoltage 阳极电压ANRS 自动嗓声抑制系统、自动降噪系统ANSI 美国国家标准协会antenna 天线 antinodes 波腹antinoise microphone 抗噪声传声器antiphase 反相antiresonance 并联谐振antiresonant ciruit 并联谐振电路antiresonant frequency 并联谐振频率APRS 英国专业录音室协会AQL 可接受的质量水平、容许品质等级arpeggio 琶音articulation 清晰度artificial ear 人工耳artificial echo 人工回声artificial voice 仿真口声ASL 美国标准协会assign 分配、指定asynchronous 不同步、异步atmosphere microphone 专门收录空气中的环境声的传声器attack time 启动时间、上升时间ATE 自动测试设备attenuation netwoke 衰减网络attenuator 衰减器audibility 可听度 audible 可听的audible tones 正常人耳能够觉察的声音，通常能认同频率范围为30到15000赫兹audio amplifier 音频放大器audio band 音频段audio componet 音频成分andio control cngineer 调音师、录音师audio cue channel 录象机声频提示通道audio equipment 声频设备、伴音设备audio frequency 声频、音频audio-frequency choke 音频扼流圈audio-frequency noise 音频嗓声audio-frequency oscillator 音频振荡器audiogram 闻阀图、听觉阀图audio head 录音头、拾音头、还音头audio-level meter 音频电平表audio patch bay 音频配线架audiophile 音频爱好者、发烧友、讲究音质者audio signal 音频信号audio spectrum 音频频谱audio tape 录音磁带audio-visual 视听的、视听系统auditorium 观众厅aural 听觉的auto-man 自动-人工automatic 自动的automatic bass compensation 自动低音补偿automatic frequency control 自动频率控制(缩写AFC) automatic gain conltrol 自动增益控制(缩写AGC)automatic record changer 自动换片器automatic rewind 自动倒带automatic shutoff 自动停止automatic track shift 自动声道转换装置automatic tuning 自动调谐automatic volume compression 自动音量压缩automatic volume control 自动音量控制autotranstormer 自耦变压器aux 辅助插口auxiliary circuit 辅助电路A-V 视听（装置）、音频-视频A V COMPU 计算机控制A V系统average 平均average value 平均值AWG 美国线规(表示导线直径，号数越大，直径越细)axial lead 轴向引线axis 轴 azimuth 方位角、方位b 巴。
现代语言学前五章课后习题答案
Chapter 1 Introduction1.Explain the following definition of linguistics: Linguistics is the scientific study oflanguage. 请解释以下语言学的定义:语言学是对语言的科学研究。
Linguistics investigates not any particular languagebut languages in general.Linguistic study is scientific because it is baxxxxsed on the systematic investigation of authentic language data.No serious linguistic conclusion is reached until after the linguist has done the following three things: observing the way language is actually usedformulating some hypothesesand testing these hypotheses against linguistic facts to prove their validity.语言学研究的不是任何特定的语言，而是一般的语言。
语言研究是科学的，因为它是建立在对真实语言数据的系统研究的基础上的。
只有在语言学家做了以下三件事之后，才能得出严肃的语言学结论:观察语言的实际使用方式，提出一些假设，并用语言事实检验这些假设的正确性。
1.What are the major branches of linguistics? What does each of them study?语言学的主要分支是什么?他们每个人都研究什么?Phonetics-How speech sounds are produced and classified语音学——语音是如何产生和分类的Phonology-How sounds form systems and function to convey meaning音系学——声音如何形成系统和功能来传达意义Morphology-How morphemes are combined to form words形态学——词素如何组合成单词Sytax-How morphemes and words are combined to form sentences句法学-词素和单词如何组合成句子Semantics-The study of meaning ( in abstraction)语义学——意义的研究(抽象)Pragmatics-The study of meaning in context of use语用学——在使用语境中对意义的研究Sociolinguistics-The study of language with reference to society社会语言学——研究与社会有关的语言Psycholinguistics-The study of language with reference to the workings of the mind心理语言学:研究与大脑活动有关的语言Applied Linguistics-The application of linguistic principles and theories to language teaching and learning应用语言学——语言学原理和理论在语言教学中的应用1.What makes modern linguistics different from traditional grammar?现代语言学与传统语法有何不同?Modern linguistics is descxxxxriptive;its investigations are baxxxxsed on authenticand mainly spoken language data.现代语言学是描述性的，它的研究是基于真实的，主要是口语数据。
倍频系数的英语
倍频系数的英语The concept of frequency multiplication, also known as frequency multiplication coefficient, lies at the heart of understanding the intricacies of sound. This coefficient, expressed as a numerical value, quantifies the relationship between an input frequency and its corresponding output frequency when passed through a particular system or device. In essence, it reveals how the system transforms the frequency of a signal, often resulting in higherfrequencies known as harmonics.Harmonics, being integral to many areas of physics and engineering, play a crucial role in sound production and perception. The human ear is particularly sensitive to certain harmonics, which contribute to the timbre andquality of sound we perceive. For instance, thecharacteristic "twang" of a guitar string is partly due to the specific harmonics generated when the string is plucked. Frequency multiplication coefficient finds its application in various audio devices and systems, including amplifiers, speakers, and musical instruments. In amplifiers, for instance, the coefficient determines theextent to which the amplifier boosts the frequency of an incoming signal, thus affecting the loudness and clarity of the sound output. Similarly, in speakers, the coefficient governs how efficiently the speaker converts electrical signals into sound waves.Musical instruments, particularly stringed instruments like guitars and violins, exhibit frequency multiplicationin a unique manner. When a string is vibrated, it producesa fundamental frequency corresponding to its length and tension. However, due to the complex interactions withinthe instrument, additional frequencies, known as overtonesor harmonics, are also generated. The frequencymultiplication coefficient in this context determines the relative strengths of these harmonics, giving each instrument its unique sonic signature.The understanding and manipulation of frequency multiplication coefficient are crucial in audio engineering, as they allow engineers to shape and control sound in desired ways. By adjusting the coefficient, engineers can enhance certain frequencies, suppress unwanted ones, and achieve the desired sound quality. This is particularlyimportant in fields like music production, where precise control over sound is essential for creating the perfect track.In conclusion, the frequency multiplication coefficient is a fundamental concept in sound analysis and manipulation. It reveals the intricate relationship between input and output frequencies, allowing us to understand and control sound in a more profound way. From amplifiers to musical instruments, this coefficient plays a pivotal role in shaping our auditory experiences and contributing to therich tapestry of sound in our world.**倍频系数：声音世界的奥秘**倍频系数，也称为频率倍增系数，是理解声音复杂性的核心概念。
城市变电站噪声的声品质烦躁度评价试验研究
城市变电站噪声的声品质烦躁度评价试验研究陈勇勇;王小鹏;杨威【摘要】针对城市变电站的低频噪声对周边居民影响日趋严重,将声品质评价的概念与研究方法引入对城市变电站噪声的评估中.通过对110 kV、220 kV和500 kV 三座全户内型城市变电站的噪声现场采集,采用等级评分法对变电站噪声的烦躁度品质进行主观试验,计算了所试验的声样本的心理声学参量.通过相关性分析和回归分析,建立了城市变电站噪声的烦躁度品质预测模型.研究结果表明:城市变电站噪声的烦躁度与A声级、响度、粗糙度和抖动度都有着相对较高的相关性,而与尖锐度的相关性较低.烦躁度主观预测模型主要取决于A声级与粗糙度,并且A声级的权重明显高于粗糙度.通过对城市变电站噪声的烦躁度品质进行评价,为变电站噪声的治理提供一个具体的、全新的思路与途径.%Based on the more and more serious influence of low frequency noise of urban substation,the concept and research method of sound quality evaluation were introduced to evaluation of urban substation noise.The whole-indoor urban substation noise for 110 kV,220 kV and 500 kV were collected,and the grading method is used to carried out the subjective test of annoyance quality of the substation noise,and several psychoacoustical parameters are calculated for the tested acoustic samples.The prediction model of annoyance quality of urban substation noise is established by the correlation analysis and regression analysis.The results show that the annoyance of urban substation noise has a relatively high correlation with A sound level,loudness,roughness and fluctuation,but has a low correlation with sharpness.The subjective prediction model of annoyance mainlydepends on A sound level and roughness,and the weight of the A sound level is significantly higher than the roughness.By evaluating the annoyance quality of urban substation noise,it can provide a concrete and new idea and way for the substation noise control.【期刊名称】《科学技术与工程》【年(卷),期】2018(018)013【总页数】5页(P214-218)【关键词】城市变电站;噪声;声品质;烦躁度【作者】陈勇勇;王小鹏;杨威【作者单位】西安交通大学机械工程学院,西安710049;西安交通大学机械工程学院,西安710049;西安交通大学机械工程学院,西安710049【正文语种】中文【中图分类】TB534.1近年来随着城市的快速扩建与发展，越来越多的变电站建在城市居民区与商业区，随之而来的变电站噪声扰民问题也是日益严重。
北清托福TPO-39 Listening
TPO 39Conversation 1QUESTIONS1. What is the conversation mainly about?Directions on how to fill out a formAn idea for a fund-raising eventTravel plans for an upcoming student tripUniversity procedures for holding fund-raising activities2. Why does the woman mention a supplemental form?To assure the man that she will approve his proposal quicklyTo remind the man of a document he recently submittedTo clarify for the man what he needs to doTo inform the man of a change to a university policy3. Why does the man mention the drama club?To explain how he got his acting experienceTo identify who will perform in the dinner theater showTo explain who wrote the script that his club wants to performTo explain where some funding for the trip **e from4. What does the man say about audience members who will attend the dinner theater show? They will ask the performers questions.They will go on the trip to Washington, D.C.They will receive a discount if they purchase tickets in advance.They will work together to solve a mystery.5. What concerns does the woman express about the man’s idea?Choose 2 answers.There is not enough time for the actors to learn their parts.It might be difficult to find a place to hold the event.This type of event has not been successful in the past.There will be costs associated with advertising the event.Lecture 1(botany)QUESTIONS1. What is the lecture mainly about?A research study **pares wild and domesticated plantsProblems with a commonly held hypothesis about the origin of teosinteReasons why wild plants are usually unsuitable for agricultureThe process used to identify the ancestor of a modern crop2. What evidence seemed to indicate that maize and teosinte are not related?Young teosinte plants do not physically resemble young maize plants.Preliminary DNA evidence indicated that teosinte was related to rice.Maize and teosinte usually grow in significantly different climates.Maize and teosinte have very different types of kernels.3. Why does the professor discuss hybrids?To explain how a geneticist confirmed that maize was widely grown 9,000 years agoTo indicate the earliest method used by geneticists to identify plant originsTo explain a method used to demonstrate a link between two plant speciesTo describe how geneticists distinguish between wild plants and domesticated plants4. What was most researchers’ initial view of George Beadle’s theory about teosinte? They accepted it but questioned the evidence cited.They rejected it because of conflicting archaeological evidence.They questioned it because it implies that ancient farmers were sophisticated plant breeders. They questioned it because genetic research was viewed with skepticism at that time.5. What did Beadle conclude about maize and teosinte?Both plants lack particular genes that **mon in most domesticated plants.Both plants have particular genes that enable them to adapt to varying climates.Only a small number of genes are responsible for the differences between the two plants. The **position of both plants is very similar to that of rice.6. According to the professor, why was the discovery of a set of tools important?It proved that teosinte was simultaneously domesticated in multiple locations.It helped to confirm the period in which maize was first domesticated.It suggested that maize required farming techniques that were **plex than experts had previously assumed.It provided evidence that maize plants were used for more purposes than experts had previously assumed.Lecture 2 (biology)QUESTIONS1. What is the main topic of the lecture?A reconsideration of a way predators can evolveNew evidence about predators tricking their preyDifferences between mimicry and camouflageUses of mimicry in predator-prey relationships2. Why does the professor mention flies?To explain an unusual case of Batesian mimicryTo give an example of a harmless species mimicking a dangerous oneTo share the findings of a research study on camouflagingTo explain why many types of insects prefer to live near bees3. What makes the type of octopus discovered off the coast of Indonesia particularly interesting to scientists?It is extremely poisonous to other animals.It can change both color and texture to blend in with its environment.It can imitate different animals in different situations.It tricks prey into thinking it is a harmless type of snake.4. What does the professor say about vocal mimicry?Choose 2 answers.It is a behavior that is not uncommon in nature.Marine organisms have never been observed using it.It is a behavior that is genetically determined rather than learned.Using it to attract prey instead of to scare predators is unusual.5. The professor discusses researchers' observations of a margay mimicking a tamarin. What does she indicate about those observations?The researchers scared away the tamarins before the margay could attack.The observations were not carried out in a scientific manner.The observations did not provide conclusive evidence that margays' mimicry is effective. The researchers established that baby tamarins respond to margay calls.6. What does the professor say about jaguars and cougars using vocal mimicry? Scientific observation must be carried out to verify this behavior.People living in the Amazon provide conclusive evidence for this behavior.This behavior must be an innate trait in jaguars and cougars.It is unlikely that jaguars and cougars exhibit this behavior.Conversation 2QUESTIONS1. Why does the woman go to see the professor?To ask his opinion regarding a debate about the origins of the Berber peopleTo get feedback on a paper that she recently submittedTo propose an alternative topic for a paper she is working onTo clarify a point that the professor made in class2. According to the woman, what error did she make in writing her original paper? She did not follow the advice of the professor's graduate assistant.She forgot to include information about the ancient Romans and Egyptians in the paper. She began writing the paper **pleting all the necessary research.She did not provide citations for all the sources she used to write the paper.3. How does the professor respond when the woman tells him that she wrote a new proposal?He suggests that the woman's original proposal was stronger than the new proposal.He indicates that he could have helped the woman find suitable material for her original proposal.He expresses disappointment that he did not have an opportunity to suggest a new topic for the woman.He suggests possible sources of information about the woman's new topic.4. What topic is covered in the woman’s new proposal?The difference between civilizations that have writing and those that do notThe ways in which international organizations interact with contemporary African governmentsThe role of education in premodern Berber societiesThe ways in which children in some modern-day **munities are educated5. What is the professor's opinion of the woman’s new topic?It is preferable to her original topic.It meets the assignment's requirements.It is too broad to be covered adequately.It is not relevant to current events.Lecture 3(Earth Science)QUESTIONS1. Why does the **pare isotopes to fingerprints?To provide support for an argumentTo clarify a difficult conceptTo identify a problem with the research studyTo suggest a way to test a theory2. What point does the professor emphasize about the region examined in the study he describes?Its steep mountainous position exaggerates the effects of water flow there.Its dry climate limits how much information it can yield about water movement.Its rainfall patterns and soil conditions are not typical of conditions in all regions.Its soil absorbs water at a much greater rate than soil in a more temperate climate.3. What did the researchers discover about small soil pores?Small pores make the movement of water through soil difficult to trace.The number of small pores in the soil of a specific area is related to the number of hydrogen isotopes there.Trees receive less water from small pores than from large pores.Small pores retain water longer than previously thought.4. In the soil examined by the researchers, what happens to rainwater that falls toward the end of the rainy season?Most of it moves through the soil to nearby streams.Most of it is absorbed by trees.It is more likely to pick up pollutants underground.Researchers have been unable to track its entire path.5. What is the professor’s opinion about the research findings?The findings provided valuable insights for a research study he conducted.The findings support a different conclusion than the one the researchers have drawn.The findings will have an impact on other fields of research.The findings are not conclusive because the movement of pollutants was not tracked.6. What is the main purpose of the lecture?To point out the flaws in a newly proposed theoryTo describe a new understanding of a basic process in soil hydrologyTo address concerns about using stable isotope analysisTo provide an explanation of a study described in the class's textbookLecture 4 (psychology)QUESTIONS1. What is the lecture mainly about?New recording technology used to study infant criesResearch that has shed light on when humans begin to learnThe discovery that infants are capable of producing different vowel soundsEvidence that supports a traditional theory of language learning2. Why does the professor mention sitting in a dorm room and hearing noises from down the hall?To show how random sounds interfere with speech productionTo illustrate how researchers are able to work with limited dataTo explain h ow infants’ cries are often perceivedTo describe how a fetus hears speech through its mother’s abdominal wall3. What points does the professor make about prosody?Choose 2 answersVoices of different speakers can be distinguished based on their prosodic features.Mothers tend to mimic the prosody of their infants.Infants learn prosody after they have learned vowel sounds.Different languages have different prosodic features.4. What does the professor say about the three-month-old infants?They have the ability to imitate vowel sounds.They can distinguish between vowels and consonants.They tend to cry with falling intonation.They tend to cry if they do not recognize a speaker’s voice.5. According to the professor, what did researchers conclude after analyzing the recordings of crying newborns?The amount of air in the lungs determines the pitch of a newborn’s cry.Most newborns cry with rising intonation.A newborn can control the pitch and volume of its cries.The loudness of a newborn’s cry is related to whether or not the mother can hear it.6. The professor mentions the possibility that infants in the crying study learned the prosodic features of their native language after they were born. What is her view of this idea? It explains the behavior of only one group of infants in the study.It is not a likely explanation of the findings reported in the study.It has **pletely ruled out by the findings of a more recent study.It is the hypothesis that is currently best supported by evidence.TPO39听力答案：Conversation 11-4 BCCD 5BDLecture 11-6 DDCCCBLecture 21-3 DBC 4AD 5-6CAConversation 21-5 CCBDBLecture 31-6 BCDACBLecture 41-2 BD 3AD 4-6ACB。
2022年新高考全国Ⅰ卷英语试题及答案解析
2022年普通高等学校招生全国统一考试（新高考全国Ⅰ卷）英语本试卷共10页，满分120分。
考试用时120分钟。
注意事项：1. 答卷前，考生务必用黑色字迹钢笔或签字笔将自己的姓名、考生号、考场号和座位号填写在答题卡上。
用2B铅笔将试卷类型（A）填涂在答题卡相应位置上。
将条形码横贴在答题卡右上角“条形码粘贴处”。
因笔试不考听力，选择题从第二部分的“阅读”开始，试题序号从“21”开始。
2. 作答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目选项的答案信息点涂黑；如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上。
3. 非选择题必须用黑色字迹钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液，不按以上要求作答的答案无效。
4. 考生必须保持答题卡的整洁：考试结束后，将试卷和答题卡一并交回。
第二部分阅读（共两节，满分50分）第一节（共15小题；每小题2.5分，满分37.5分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。
AGrading Policies for Introduction to LiteratureGrading Scale90-100, A; 80-89, B; 70-79, C; 60-69, D; Below 60, E.Essays（60%）Your four major essays will combine to form the main part of the grade for this course: Essay 1 =10%; Essay 2=15%; Essay 3=15%; Essay 4=20%Group Assignments（30%）Students will work in groups to complete four assignments（作业）during the course. All the assignments will be submitted by the assigned date through Blackboard, our online learning and course management system.Daily Work/In-Class Writings and Tests/Group Work/Homework（10%）Class activities will vary from day to day, but students must be ready to complete short in-class writings or tests drawn directly from assigned readings or notes from the previous class' lecture/discussion, so it is important to take careful notes during class. Additionally, from time to time I will assign group work to be completed in class or short assignments to be completed at home, both of which will be graded.Late WorkAn essay not submitted in class on the due date will lose a letter grade for each class period it is late. If it is not turned in by the 4th day after the due date, it will earn a zero. Daily assignments not completed during class will get a zero. Short writings missed as a result of an excused absence will be accepted.21. Where is this text probably taken from?A. A textbook.B. An exam paper.C. A course plan.D. An academic article.22. How many parts is a student's final grade made up of?A. Two.B. Three.C. Four.D. Five.23. What will happen if you submit an essay one week after the due date?A. You will receive a zero.B. You will lose a letter grade.C. You will be given a test.D. You will have to rewrite it.BLike most of us, I try to be mindful of food that goes to waste. The arugula（芝麻菜）was to make a nice green salad, rounding out a roast chicken dinner. But I ended up working late. Then friends called with a dinner invitation. I stuck the chicken in the freezer. But as days passed, the arugula went bad. Even worse, I had unthinkingly bought way too much; I could have made six salads with what I threw out.In a world where nearly 800 million people a year go hungry, "food waste goes against the moral grain," as Elizabeth Royte writes in this month's cover story. It's jaw-dropping how much perfectly good food is thrown away—from “ugly"（but quite eatable）vegetables rejected by grocers to large amounts of uneaten dishes thrown into restaurant garbage cans.Producing food that no one eats wastes the water, fuel, and other resources used to grow it. That makes food waste an environmental problem. In fact, Royte writes, "if food waste were a country, it would be the third largest producer of greenhouse gases in the world."If that's hard to understand, let's keep it as simple as the arugula at the back of my refrigerator. Mike Curtin sees my arugula story all the time —but for him, it's more like 12 bones of donated strawberries nearing their last days. Curtin is CEO of DC Central Kitchen in Washington, D.C., which recovers food and turns it into healthy meals. Last year it recovered more than 807,500 pounds of food by taking donations and collecting blemished（有瑕疵的）produce that otherwise would have rotted in fields. And the strawberries? V olunteers will wash, cut, and freeze or dry them for use in meals down the road.Such methods seem obvious, yet so often we just don't think. "Everyone can play a part in reducing waste, whether by not purchasing more food than necessary in your weekly shopping or by asking restaurants to not include the side dish you won't eat," Curtin says.24. What does the author want to show by telling the arugula story?A. We pay little attention to food waste.B. We waste food unintentionally at times.C. We waste more vegetables than meat.D. We have good reasons for wasting food.25. What is a consequence of food waste according to the test?A. Moral decline.B. Environmental harm.C. Energy shortage.D. Worldwide starvation.26. What does Curtin's company do?A. It produces kitchen equipment.B. It turns rotten arugula into clean fuel.C. It helps local farmers grow fruitsD. It makes meals out of unwanted food.27. What does Curtin suggest people do?A. Buy only what is needed.B. Reduce food consumption.C. Go shopping once a week.D. Eat in restaurants less often.CThe elderly residents（居民）in care homes in London are being given hens to look after to stop them feeling lonely.The project was dreamed up by a local charity（慈善组织）to reduce loneliness and improve elderly people's wellbeing, It is also being used to help patients suffering dementia, a serious illness of the mind. Staff in care homes have reported a reduction in the use of medicine where hens are inuse.Among those taking part in the project is 80-year-old Ruth Xavier. She said: “I used to keep hens when I was younger and had to prepare their breakfast each morning before I went to school."I like the project a lot. I am down there in my wheelchair in the morning letting the hens out and down there again at night to see they've gone to bed."It's good to have a different focus. People have been bringing their children in to see the hens and residents come and sit outside to watch them. I'm enjoying the creative activities, and it feels great to have done something useful."There are now 700 elderly people looking after hens in 20 care homes in the North East, and the charity has been given financial support to roll it out countrywide.Wendy Wilson, extra care manager at 60 Penfold Street, one of the first to embark on the project, said: "Residents really welcome the idea of the project and the creative sessions. We are looking forward to the benefits and fun the project can bring to people here."Lynn Lewis, director of Notting Hill Pathways, said: "We are happy to be taking part in the project. It will really help connect our residents through a shared interest and creative activities."28. What is the purpose of the project?A. To ensure harmony in care homes.B. To provide part-time jobs for the aged.C. To raise money for medical research.D. To promote the elderly people's welfare.29. How has the project affected Ruth Xavier?A. She has learned new life skills.B. She has gained a sense of achievement.C. She has recovered her memory.D. She has developed a strong personality.30. What do the underlined words "embark on" mean in paragraph 7?A. Improve.B. Oppose.C. Begin.D. Evaluate.31. What can we learn about the project from the last two paragraphs?A. It is well received.B. It needs to be more creative.C. It is highly profitable.D. It takes ages to see the results.DHuman speech contains more than 2,000 different sounds, from the common "m" and "a" to the rare clicks of some southern African languages. But why are certain sounds more common than others? A ground-breaking, five-year study shows that diet-related changes in human bite led to new speech sounds that are now found in half the world's languages.More than 30 years ago, the scholar Charles Hockett noted that speech sounds called labiodentals, such as "f" and "v", were more common in the languages of societies that ate softer foods. Now a team of researchers led by Damián Blasi at the University of Zurich, Switzerland, has found how and why this trend arose.They discovered that the upper and lower front teeth of ancient human adults were aligned（对齐）, making it hard to produce labiodentals, which are formed by touching the lower lip to the upper teeth. Later, our jaws changed to an overbite structure（结构）, making it easier to produce such sounds.The team showed that this change in bite was connected with the development of agriculture in the Neolithic period. Food became easier to chew at this point. The jawbone didn't have to do as much work and so didn't grow to be so large.Analyses of a language database also confirmed that there was a global change in the sound of world languages after the Neolithic age, with the use of "f" and "v" increasing remarkably during the last few thousand years. These sounds are still not found in the languages of many hunter-gatherer people today.This research overturns the popular view that all human speech sounds were present whenhuman beings evolved around 300,000 years ago. "The set of speech sounds we use has not necessarily remained stable since the appearance of human beings, but rather the huge variety of speech sounds that we find today is the product of a complex interplay of things like biological change and cultural evolution," said Steven Moran, a member of the research team.32. Which aspect of the human speech sound does Damián Blasi's research focus on?A. Its variety.B. Its distribution.C. Its quantity.D. Its development.33. Why was it difficult for ancient human adults to produce labiodentals?A. They had fewer upper teeth than lower teeth.B. They could not open and close their lips easily.C. Their jaws were not conveniently structured.D. Their lower front teeth were not large enough.34. What is paragraph 5 mainly about?A. Supporting evidence for the research results.B. Potential application of the research findings.C. A further explanation of the research methods.D. A reasonable doubt about the research process.35. What does Steven Moran say about the set of human speech sounds?A. It is key to effective communication.B. It contributes much to cultural diversity.C. It is a complex and dynamic system.D. It drives the evolution of human beings.第二节（共5小题；每小题2.5分，满分12.5分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
基于中潜伏期听觉诱发电位的听觉注意特征提取与识别
基于中潜伏期听觉诱发电位的听觉注意特征提取与识别蒋本聪;王力;邹采荣;胡晓;汪家冬;梁瑞宇【摘要】针对目前研究听觉注意的实验范式采用电极数量较多,且使用P3电位诱发时间比较长等问题,设计了一种基于听觉诱发中潜伏期反应(MLR)的实验范式.首先在注意与非注意两种状态下诱发出相应的MLR,再分别计算MLR的能量、方差、面积、AR模型系数和波形峰值作为特征值.最后,通过模式识别算法进行分类.实验结果表明:8位受试者以人工神经网络(ANN)为分类器的平均正确率可达到77.2%,本范式对于大部分受试者的效果较理想.%In view of some problems that existin the present research on auditory attention paradigm,for example, using a large number of electrodes,longer time needs to evoke P3 potentials and so on. An experimental paradigm based on the middle latencyresponse( MLR) is designed from auditory evoked. At first,the MLRs are respectively induced in two states of attention and non-attention;and then the energy,variance,area,AR model coefficient and waveform peak value of MLRs are respectively calculated. Finally,the features are classified by the pattern recogni-tion algorithm. The experimental results show that the average accuracy of artificial neural network( ANN) is 77.2%from 8 subjects,which means that the paradigm can achieve satisfactory results.【期刊名称】《电子器件》【年(卷),期】2017(040)006【总页数】6页(P1539-1544)【关键词】听觉诱发;听觉注意;中潜伏期反应;AR模型系数;模式识别;人工神经网络【作者】蒋本聪;王力;邹采荣;胡晓;汪家冬;梁瑞宇【作者单位】广州大学机械与电气工程学院,广州510006;广州大学机械与电气工程学院,广州510006;广州大学机械与电气工程学院,广州510006;广州大学机械与电气工程学院,广州510006;广州大学机械与电气工程学院,广州510006;东南大学信息科学与工程学院,南京210096【正文语种】中文【中图分类】R339.16视力障碍极大地影响了患者的日常生活,往往视力受限的患者,其听觉系统是完好的。
物理专业词汇
Aa.c. generator 交流发电机aberration 光行差，像差absolute index of refraction 绝对折射率absolute refractive index 绝对折射率absolute temperature scale 绝对温标absolute zero 绝对零度absorber 吸收体absorbing power 吸收能力，吸收本领absorptance 吸收比absorption 吸收absorption coefficient 吸收系数absorption line 吸收谱线 absorption spectrum 吸收光谱，吸收谱accelerate 加速acceleration 加速度acceleration due to gravity 重力加速度acceleration-time graph 加速度—时间关系线图accelerator 加速器acceptor 接受体acceptor doping 受体掺杂acceptor impurity 受体杂质accommodation 调节，视觉调节accumulator 蓄电池accuracy 准确度acetate strip 醋酸酯条片achromatic 消色差的achromatic aberration 消色差achromatic condenser 消色差聚光透镜achromatic light 消色差光，白光acoustic blur 声响模糊acoustic board 吸音板，吸声板acoustic navigation 声响导航acoustic pressure 声压acoustics 声学act on 施于action 作用量，作用，作用力action of point 尖端作用activation 激活，活化activation energy 激活能，活化能active nucleus 活性核，放射性核activity 放射强度，放射性adapter 接合器adder 加法器adhesion 附着力，附着，黏附adhesive force 附着力adiabatic 绝热的adiabatic expansion 绝热膨胀adiabatic process 绝热过程aerial 天线 aerial induction 天线调谐电感aerial network 天线网络aerodynamic force 气动力，空气动力aerodynamics 气体动力学，空气动力学aerofoil 机翼agent 剂air blower 吹风器air column 空气柱，气柱air cushion 气垫air damping 空气阻尼air film 气膜air track 气垫导航air wedge 气楔alignment 对准，校整alpha decay α衰变alpha particle α粒子alpha particle scattering analogue α粒子放射模拟alternating current 交流电alternating voltage 交变电压，交流电压alternator 交流发电机altimeter 高度计，测高仪americium ammeter 安培计amorphous 非结晶的，无定形的ampere 安培，安ampere-hour 安培小时，安时amplification 放大，放大率amplifier 放大器amplify 放大amplitude 振幅amplitude modulation 调幅，振幅调剂amyl acetate 醋酸戊酯anaemia 贫血analogue 模拟analogue experiment 模拟实验analogue signal 仿真讯号，非数字讯号analogue-to-digital conversion 模拟转换analyser 检偏振器AND gate 「与」门anemometer 风速计aneroid barometer 无液气压计，空盒气压计angle of contact 接触角angle of deviation 偏向角angle of diffraction 衍射角，绕射角angle of dip 倾角angle of elevation 仰角angle of emergence 出射角angle of incidence 入射角angle of inclination 倾角angle of minimum deviation 最小偏向角angle of projection 投射角angle of reflection 反射角angle of refraction 折射角angle of twist 扭转角angstrom 埃angular acceleration 角加速度angular aperture 孔径张角angular displacement 角位移angular frequency 角频率angular impulse 角冲量angular magnification 角度放大，角放大率angular momentum 角动量，动量矩angular motion 角向运动，角运动angular seed 角速率angular velocity 角速度angular width 角宽度annealing 退火，韧化anode 阳极，正极anomalous expansion 反常膨胀antenna 天线 anticlockwise moment 逆时针力矩antifreeze 防冻剂antinodal line 腹线 antinode 波腹antiparticle 反粒子antiphase 反相，逆相aperture 孔径，口径，孔apparent depth 视深apparent expansion 表观膨胀，视膨胀apparent frequency 表观频率，视频率apparent loss in weight 表观失重apparent weight 表观重量Appleton layer 阿普顿层，F电离层aqueous layer 水层Archimedes' principle 阿基米得原理area 面积argon 氩armature 电枢artificial disintegration 人工蜕变artificial radioactivity 人工放射astable 非稳态的astable circuit 非稳态电路astable multivibrator 非态多谐振荡器astigmatism 像散，散光astronomical telescope 天文望远镜at infinity 在无穷远处at rest 静止atmosphere 大气，大气层，大气压atmospheric pressure 大气压强atom 原子atomic bomb 原子弹atomic bond 原子键atomic density 原子密度atomic diameter 原子直径atomic energy 原子能atomic mass 原子质量atomic mass unit 原子质量单位atomic model 原子模型atomic nucleus 原子核atomic number 原子序数atomic radius 原子半径atomic separation 原子间距atomic spacing 原子间距atomic structure 原子结构atomic theory 原子论atomizer 喷雾器attenuation 衰减attraction 吸引attractive force 吸力audible frequency range 听频范围audible signal 可听讯号audio frequency 声频autofocus 自动聚焦，自动对焦avalanche 电子雪崩average acceleration 平均加速度average power 平均功率average speed 平均速率average velocity 平均速度Avogadro constant 阿佛加德罗常数，阿佛加德罗常量Avogadro number 阿佛加德罗数Avogadro's law 阿佛加德罗定律axial 轴向的，沿轴的axial field 轴向场axial search coil 轴向探察线图axis 轴axis of rotation 转轴Bback e.m.f. 反电动势background radiation 本底辐射Bainbridge mass spectrometer 班布里奇质谱仪balance 天平，秤，平衡balance arm 秤杆，平衡臂balance point 平衡点balance bridge 平衡电桥balanced force 平衡力ball bearing 球轴承，滚珠轴承ballistic galvanometer 冲击电流计，冲击检流计ballistic pendulum 冲击摆Balmer series 巴耳末系，巴耳末光谱band spectrum 带状光谱，带状谱bandwidth 带宽bar code 条形码bar magnet 磁棒bare wire 裸线 barium 钡barometer 气压计barrier 障碍物barrier layer 阻档层，耗尽层barrier potential difference 阻档层电势差，阻档层电位差Barton's pendulums 巴尔通摆base 基极base current 基极电流battery 电池组battery charger 电池充电器battery holder 电池座beaker 烧杯beam splitter 分束器，射束分离器beat 拍beat frequency 拍频becquerel 贝克勒耳，贝克bel 贝尔，贝bell jar 钟形罩bench mat 实验台垫Bernoulli's theorem 伯努利定律beryllium 铍beta decay β衰变beta particle β粒子biasing circuit 偏压电路biasing voltage 偏压biconcave lens 双凹透镜biconvex lens 双凸透镜bicycle dynamo 自行车发电机，脚踏车发电机bifilar pendulum 双线摆bifocal lens 双焦距透镜big bang model 大爆炸模型bimetallic strip 双层金属片，双金属片binary adder 二进加法器binary system 二进制binding 结合binding energy 结合能binoculars 双筒望远镜Biot-Savart law 毕奥—萨伐尔定律bipolar 双极的birefraction 双折射bistable 双稳态的，双稳器bistable circuit 双稳电路bistable multivibrator 双稳态多谐振荡器bit 二进制制，位black body radiation 黑体辐射block and tackle 滑轮组block diagram 方框图blocking capacitor 隔直流电器容blooming 敷霜，表面加膜Bohr atom 玻尔原子Bohr radius 玻尔半径Bohr theory 玻尔理论boil 沸腾，煮沸boiler 锅炉boiling point 沸点bolometer 辐射热计Boltzmann constant 玻耳兹曼常数，玻耳兹曼常量bombardment 轰击bond energy 键能bonding 键合Bourdon gauge 布尔登气压计bow wave 弓形波，舷波Boyle's law 博伊尔定律Brackett series 布喇开系，布喇开光谱Bragg angle 布喇格角Bragg diffraction 布喇格衍射，布喇格绕射Bragg plane 布喇格平面Bragg's law 布喇格定律brake 制动器breakdown potential 击穿电势，击穿电位breaking point 断点breaking strength 抗断强度breaking stress 致断应力breeder reactor 增殖反应堆bremsstrahlung 轫致辐射Brewster's law 布鲁斯特定律bridge circuit 桥式电路bridge rectifier 桥式整流器bright fringe 亮纹brightness 亮度brittle 脆的，易碎的bromine 溴Brownian movement 布朗运动brush 电刷bubble chamber 气泡室bubble raft model 泡筏模型buffer 缓冲器buffer circuit 缓冲电路bulk modulus 体积弹性模量Bunsen burner 本生灯buoyancy 浮力burette 滴定管burette stand 滴定管架burglar alarm 防盗警报器，防盗警钟buzzer 蜂鸣器by-pass 旁路byte 二进制组，字节Ccable 电缆cadmium sulphide 硫化镉caesium 铯calcite 方解石calibrate 校准，标上刻度calipers 测径器，卡钳calorie 卡路里，卡calorimeter 量热器camera 照相机cancer cell 癌细胞candela 坎德拉cantilever 悬臂capacitance 电容capacitance substitution box 换值电容箱capacitive circuit 电容电路capacitive component 电容性分量capacitive coupling 电容耦合capacitive discharge 电容性放电capacitive reactance 容抗capacitor 电容器capacitor-input filter 电容输入滤波器capacity 容量，载量capillarity 毛细现象，毛细作用capillary depression 毛细下降capillary rise 毛细上升capillary tube 毛细管capsule 囊capture 俘获carbon 碳carbon granule 碳颗粒carbon paper disc 圆形碳纸carbon-14 dating 碳14年代测定法carburettor 化油器，汽化器carrier wave 载波carry 进位castor oil 蓖麻油cataract 白内障cathode 阴极，负极cathode ray 阴极射线 cathode ray deflection tube 阴极射线偏转管cathode-ray oscilloscope 阴极射线示波器，示波器cathode-ray tube 阴极射线管cavity resonator 空腔共振器celestial telescope 天体望远镜cell 电池，细胞Celsius temperature scale 摄氏温标centimetre 厘米centralized low voltage power supply unit 中央控制低压电源箱centre of curvature 曲率中心centre of gravity 重心centre of mass 质心centre of oscillation 振荡中心centre-tapped transformer 中心抽头变压器centrifugal force 离心力centrifuge 离心机centripetal acceleration 向心加速度centripetal force 向心力Chadwick 查德威克chain reaction 连锁反应change of state 物态变化change-over switch 换向开关characteristic 特性，特征characteristic curve 特性曲线 characteristic line 特征线，特征谱 characteristic spectrum 特征光谱，特征谱charge 电荷，充电，起电charge carrier 载荷子charge conservation 电荷守恒charge density 电荷密度charge distribution 电荷分布charge to mass ratio 荷质比charged particle 带电粒子charging by contact 接触起电charging by friction 摩擦生电charging by induction 感应起电charging by sharing 授受起电charging time constant 充电时间常数，充电时间常量Charles's law 查理定律choke 扼流，抗流，扼流圈，抗流圈choke circuit 扼流电路，抗流电路chromatic aberration 色差chromatic dispersion 色散cinefilm soundtrack 电影胶片声迹circle of least confusion 最少模糊圈，明晰圈circuit 电路circuit board 电路板circuit breaker 断路器circuit symbol 电路符号circular coil 环形线圈circular motion 圆周运动circular orbit 圆周轨道circular pulse 圆形脉冲circular wave 圆形波circular wavefront 圆形波阵面，圆形波前clamp 夹钳，夹紧clap-echo method 「拍掌—回声」法cleave 裂开clinical thermometer 体温计clip 夹子clockwise moment 顺时针力矩closed circuit 闭合电路closed pipe 闭管closed tube 闭管closed-loop control system 死循环控制系统closed-loop gain 死循环增益closed-loop voltage gain 死循环电压增益closely packed 密堆积的cloud chamber 云室cloud chamber track 云室径迹coaxial 共轴，同轴coaxial cable 同轴电缆，同轴 cobalt 钴code 编码coder 编码器coefficient of dynamic friction 动摩擦系数coefficient of friction 摩擦系数coefficient of restitution 恢复系数coefficient of static friction 静摩擦系数coefficient of viscosity 黏滞系数coherent 相干的cohesion 内聚力，内聚cohesive force 内聚力coil 线圈collector 集电极，集极collector current 集电极电流，集极电流collimator 准直管，准直仪collision 碰撞colour 颜色colour code 色码，色标combinational logic 组合逻辑common emitter 共发射极common-mode voltage 共模电压commutator 换向器compass 指南针，罗盘complete circuit 完整电路component 组件，分量，组分component of force 分力compound microscope 复式显微镜compound pendulum 复摆compressed gas 压缩气体compressibility 可压缩性，压缩系数，压缩率compressible fluid 可压缩性流体compression 密部，压缩compression spring balance 压缩弹簧天平concave 凹concave lens 凹透镜concave mirror 凹镜，凹面镜concentric capacitor 同心电容器condensation 凝结，凝聚condensation nucleus 凝结核，凝聚核condensation point 凝点，凝结点condenser 聚光器，电容器，冷凝器conductance 电导conductivity 传导性，传导率conductor 导体conical pendulum 锥摆conjugate foci 共轭焦点conservation of angular momentum 角动量守恒conversation of charge 电荷守恒conservation of energy 能量守恒conservation of mechanical energy 机械能守恒conservation of momentum 动量守恒conservative force 守恒力，保守力conserved 守恒constant acceleration 恒加速度constant angular acceleration 恒角加速度constant angular velocity 恒角速度constant force 恒力constant motion 恒速运动constant pressure 定压constant speed 恒速率constant temperature 定温constant velocity 恒速度constant volume 定容constant volume gas thermometer 定容气体温度计constantan 康铜constriction 颈缩constructive interference 相长干涉contact angle 接触角contact area 接触面积contact force 接触力continuity equation 连续性方程continuous spectrum 连续光谱，连续谱continuous wave 连续波contract 收缩control experiment 对照实验，比对实验control grid 控制栅极control rod 控制棒control system 控制系统convection 对流converge 会聚converging lens 会聚透镜converging mirror 会聚镜convex 凸convex lens 凸透镜convex mirror 凸镜，凸面镜coolant 冷却剂cooling by evaporation 蒸发致冷cooling correction 冷却修正cooling curve 冷却曲线 cooling effect 冷却效应cooling system 冷却系统，散热系统coplanar forces 共面力core 心，核心Coriolis force 科里奥利力corkscrew rule 螺旋法则cornea 角膜corona discharge 电晕放电corpuscular theory of light 光的微粒学说correction 矫正，修正cosmic radiation 宇宙辐射coulomb 库伦Coulomb's law 库伦定律count rate 计数率counter 计数器counter weight 平衡锤，配重couple 力偶coupled oscillation 耦合振荡coupling 耦合covalent bond 共价键crane magnet 起重磁铁creep 蠕变crest 波峰critical angle 临界角critical damping 临界阻尼critical mass 临界质量critical point 临界点critical temperature 临界温度critical velocity 临界速度crocodile clip 鳄鱼夹cross hairs 十字丝，叉丝cross-sectional area 截面积Crova's disc 克罗瓦盘crystal 晶体crystal diffraction 晶体衍射，晶体绕射crystal lattice 晶体点阵，晶体格子，晶格crystal planes 晶面crystalline 结晶的crystallization 结晶crystallography 晶体学cubical expansivity 体积膨胀系数，体积膨胀率curie 居里current 电流current amplification 电流放大current amplification factor 电流放大因素current amplifier 电流放大器current balance 电流天平current density 电流密度current gain 电流增益current intensity 电流强度current pulse 电流脉冲current sensitivity 电流灵敏度current stabilizer 稳流器current transfer characteristic 电流转移特性current-carrying conductor 载电流导体current-voltage characteristic curve 电流—电压特性曲线 curved mirror 曲面镜cyclotron 回旋加速器cylindrical concave lens 柱面凹透镜cylindrical concave mirror 柱面凹镜cylindrical convex lens 柱面凸透镜cylindrical convex mirror 柱面凸镜cylindrical lens 柱面透镜cylindrical mirror 柱面镜Dd.c. generator 直流发电机d.c. motor 直流电动机Dalton's law of partial pressures 道尔顿分压定律damped harmonic motion 阻尼谐动damped harmonic oscillation 阻尼谐振damped oscillation 阻尼振荡damping 阻尼damping force 阻尼力dark fringe 暗纹data 数据dating 年代测定daughter nucleus 子核daughter nuclide 子核素de Broglie relation 德布罗意关系式de Broglie wave 德布罗意波dead time 失效时间decade capacitance box 十进电容箱decade resistance box 十进电阻箱decay 衰变decay analogue 衰变模拟decay constant 衰变常数，衰变常量decay curve 衰变曲线 decay law 衰变定律decay product 衰变产物decelerate 减速deceleration 减速度decibel 分贝decode 译码，解碼decoder 译码器，译码器deflection 偏转deflection plate 偏转板deflection system 偏转系统deflection tube 偏转管deformation 形变degradation of energy 能量退降，能量递降degree 度degree Celsius 摄氏度degree of freedom 自由度demagnetization 去磁，退磁demonstration diode 演示用二极管demonstration meter 演示用电表density 密度depletion layer 耗尽层，阻挡层depth of field 景深derived quantity 导出量derived unit 导出单位destructive interference 相消干涉detection 探测detector 探测器detector of radiation 辐射探测器deuterium 氘，重氢deuteron 氘核，重氢核deviation 偏向，偏差device 装置，设计，器件diamagnetism 抗磁性diaphragm 光阑，膜片diatomic molecule 双原子分子dielectric 电介质，介电的dielectric constant 介电常数，介电常量，电容率dielectric polarization 电介质极化dielectric strength 电介质强度differential equation 微分方程differential input voltage 差动输入电压diffracted ray 衍射线，绕射线 diffraction 衍射，绕射diffraction grating 衍射光栅，绕射光栅diffuse reflection 漫反射diffusion 扩散，漫射diffusion cloud chamber 扩散云室digital 数字的digital display 数字显示digital signal 数字讯号digital-to-analogue conversion 数模转换dimension 量纲，因次，维，大小dimensional analysis 量纲分析，因次分析diminished 缩小diode 二极管diode probe 二极管微波探测器dioptre 屈光度，焦度dipole 偶极子direct current 直流电direction 方向，方位direction of propagation 传播方向directly heated cathode 直热式阴极discharge 放电disintegration 蜕变dislocation 位错dispersion 色散dispersive power 色散能力，色散本领，色散率displacement 位移，排量displacement can 排水罐displacement-time graph 位移—时间关系线图dissipative force 耗散力distance 距离distance-time graph 距离—时间关系线图distortion 失真，扭曲，畸变disturbance 干扰diverge 发散diverging lens 发散透镜diverging mirror 发散镜division of amplitude 振幅分割division of wavefront 波阵面分割，波前分割domain 畴，域domestic circuit 家居电路donor 给予体doped semiconductor 掺杂半导体doping 掺杂Doppler broadening 多普勒谱线增宽Doppler effect 多普勒效应Doppler shift 多普勒频移dosage 剂量dose 剂量dose rate 剂量率double pulley 双滑轮double refraction 双折射double slit 双缝double-pole-double-throw switch 双刀双掷开关doublet 双重线 drag force 阻力，曳力drift velocity 漂移速度driver circuit 驱动电路driver frequency 驱动频率driving cell 驱动电池driving force 驱动力driving mirror 行车后视镜dry battery 干电池组dry cell 干电池dual trace oscilloscope 双迹示波器ductile 延性的Dulong-Petit law 杜隆—珀替定律dynamic equilibrium 动态平衡dynamic friction 动摩擦dynamic resistance 动态电阻dynamics 动力学dynamo 发电机Eearth 接地，地线 earthquake waves 地震波ebonite 硬橡胶，硬质胶ebonite rod 硬橡胶棒，硬质胶棒echo 回声，回波eddy current 涡电流，涡流eddy current damping 涡流阻尼eddy current loss 涡流损耗effective mass 有效质量efficiency 效率effort 施力Einstein's mass-energy relation 爱因斯坦质能关系式elastic collision 弹性碰撞elastic constant 弹性常数，弹性常量elastic deformation 弹性形变elastic hysteresis 弹性滞后elastic limit 弹性极限elastic strain energy 弹性应变能elasticity 弹性electric bell 电铃electric charge 电荷electric current 电流electric field 电场electric field intensity 电场强度electric field pattern 电场图形electric fire 电暖炉electric line of force 电力线 electric motor 电动机electric potential 电势，电位electric power 电功率electric shock 电震electrical appliance 电器electrical conductivity 导电率electrical energy 电能electrical oscillation 电振荡electrical potential energy 电势能，电位能electrical resonance 电共振electricity 电，电学electrode 电极electrolysis 电解electrolyte 电解质electrolytic 电解质的，电解的electrolytic capacitor 电解质电容器electromagnet 电磁铁，电磁体electromagnetic coil 电磁感应圈electromagnetic contact 电磁触点electromagnetic force 电磁力electromagnetic induction 电磁感应electromagnetic moment 电磁矩electromagnetic oscillation 电磁振荡electromagnetic radiation 电磁辐射electromagnetic spectrum 电磁波谱electromagnetic wave 电磁波electromagnetism 电磁学electrometer 静电计electromotive force 电动势electron 电子electron beam 电子束electron cloud 电子云electron diffraction 电子衍射，电子绕射electron drift 电子漂移electron energy level 电子能级electron gun 电子枪electron transition 电子跃迁electron tube 电子管electron-volt 电子伏特，电子伏electronics 电子学electrophorus 起电盘electroscope 验电器electrostatic bond 静电键electrostatic field apparatus 静电场仪器electrostatic precipitation 静电沉淀法electrostatics 静电学element 元素，组件elliptic orbit 椭圆轨道elongation 伸长度emergent ray 出射线 emission 发射emission line 发射谱线 emission spectrum 发射光谱，发射谱emissivity 发射率，比辐射率emit 发射emitter 发射极，射极emitter current 发射极电流，射极电流enamelled wire 漆包线 encode 编码encoder 编码器end-correction 端部修正，管口校正量end-on collision 同向碰撞，尾追碰撞energetic particle 高能粒子energy 能量，能energy band 能带energy conversion 能量转换energy conversion efficiency 能量转换效率energy input 能量输入energy level 能级energy output 能量输出energy transfer 能量转移enriched uranium 浓缩铀equation of continuity 连续性方程equation of state 物态方程equation of uniformly accelerated motion 匀加速运动方程equatorial orbit 赤道轨道equilibrium 平衡equilibrium condition 平衡条件equilibrium spacing 平衡间距equipartition of energy 能量均分equipotential 等势的，等位的equipotential line 等势线，等位线 equipotential surface 等势面，等位面equivalent capacitance 等效电容equivalent inductance 等效电感equivalent resistance 等效电阻erect 正立escape velocity 逃逸速度ether 以太，醚evacuation 抽成真空evaporation 蒸发excess pressure 超压，逾电压excitation 激发excitation energy 激发能excitation potential 激发电势，激发电位excitation voltage 激发电压excited 受激excited energy level 受激能级excited state 受激态expansion 膨胀expansivity 膨胀系数，膨胀率exponential change 指数式改变exponential decay 指数式衰变exposure 曝光量，照射extension 伸长external force 外力external work 外功extra high tension 超高电压extra-nuclear structure 核外结构extraordinary ray 非常光线 extrapolation 外推，外推法extrinsic semiconductor 含杂质半导体eyepiece 接目镜，目镜Ff-number f数，光圈数f-stop f制光圈far point 远点farad 法拉Faraday constant 法拉第常数，法拉第常量Faraday's law of electromagnetic induction 法拉第电磁感应定律fast breeder reactor 快中子增殖反应堆feedback 反馈feedback amplifier 反馈放大器feedback resistance 反馈电阻ferromagnetic substance 铁磁性物质ferromagnetism 铁磁性fictitious force 假力，伪力fidelity 保真性，保真度field coil 场线圈field effect transistor 场效应晶体管field intensity 场强field lines 场力线 field magnet 场磁铁，场磁体field of view 视场，视野field strength 场强figure of merit 优值，灵敏值filament 灯丝，丝极filter capacitor 滤波电容器filter circuit 滤波电路filter pump 滤泵final state 终态，末态final velocity 末速度fine-adjustment 微调，细调fire alarm 火警警报器，火警钟first law of thermodynamics 热力学第一定律first order spectrum 第一级光谱，第一级谱fission 裂变fission reactor 裂变反应堆fixed point 定点fixed pulley 定滑轮fixed resistor 定值电阻器flat coil 扁平线圈flat solenoid 扁平螺线管flat-bottomed flask 平底烧瓶Fleming's left hand rule 弗林明左手定则Fleming's right hand rule 弗林明右手定则floating body 浮体fluid 流体fluid dynamics 流体动力学fluorescence 荧光fluorescent screen 荧光屏，荧光幕flux 通量flux density 通量密度fly-back 回扫flywheel 飞轮focal length 焦距focal plane 焦平面focus 焦点，聚焦，对焦focus control 聚焦控制follower circuit 跟随电路foot pump 脚踏泵force 力force constant 力常数，力常量force polygon 力多边形force resolution 力的分解force triangle 力三角形force-extension curve 施力—伸长关系曲线 forced oscillation 受迫振荡former 框forward biased 正向偏压forward current 正向电流fossil fuel 化石燃料Foucault's rotating mirror method 傅科旋转镜法frame of reference 参考坐标系，参考系Franck-Hertz experiment 弗兰克—赫兹实验Fraunhofer diffraction 夫琅和费衍射，夫琅和费绕射Fraunhofer lines 夫琅和费谱线 free electron 自由电子free fall 自由下坠，自由下落free falling body 自由落体free oscillation 自由振荡free path 自由程free space 自由空间freeze 凝固freezing point 凝固点freon 氟利昂，二氯二氟甲烷frequency 频率frequency modulation 调频，频率调制frequency response 频率响应Fresnel diffraction 菲涅耳衍射，菲涅耳绕射Fresnel's biprism 菲涅耳双棱镜friction 摩擦，摩擦力friction compensated 补偿摩擦作用frictionless motion 无摩擦运动fringe 条纹fringe pattern 条纹图形fuel rod 燃料棒fulcrum 支点full adder 全加法器full-scale deflection 满标偏转full-wave rectification 全波整流full-wave rectifier 全波整流器fundamental frequency 基频fundamental mode of vibration 基谐振动模式fundamental note 基音fundamental quantity 基本量fundamental unit 基本单位fuse 保险丝fuse rating 保险丝额定值fusion 熔解，聚变fusion point 熔点fusion reactor 聚变反应堆GG - clamp G-形钳gain 增益gain control 增益控制galaxy 星系Galilean telescope 伽利略望远镜Galileo's thought experiment 伽利略假想实验galvanometer 电流计，检流计gamma radiation 伽玛辐射gamma ray 伽玛射线 gap 隙gas 气，气体gas pressure 气体强压，气压gaseous phase 气相gaseous state 气态gauge 规，计Gauss theorem 高斯定理Geiger counter 盖革计数器Geiger-Marsden scattering experiment 盖革—马斯登散射实验Geiger-Muller counter 盖革—弥勒计数器Geiger-Muller tube 盖革—弥勒管general gas equation 普适气体方程general gas law 普适气体定律generator 发电机genetic effect 遗传效应geometrical optics 几何光学germanium 锗ghost effect 迭影效应glancing angle 掠射角glass fibre 玻璃纤维glycerine 甘油gold foil 金箔fold leaf electroscope 金箔验电器gradient 斜率，梯度graduated cylinder 量筒Graham's law of diffusion 格拉哈姆散定律grain 粒，晶粒gramophone record 唱片，唱碟graph 图，线图，图表graphical method 图解法grating 光栅grating spectrometer 光栅光谱仪，光栅分光计gravitational acceleration 重力加速度gravitational attraction 引力，重力gravitational constant 引力常数，引力常量gravitational field 引力场，重力场gravitational force 引力，重力gravitational mass 引力质量gravitational potential 引力势，重力势gravitational potential difference 引力势差，重力势差gravitational potential energy 引力势能，重力势能gravity 重力grazing incidence 掠入射，切入射greenhouse effect 温室效应grid 栅极grid control 栅极控制grid system 电力网groove 纹道，针槽，开槽ground 接地ground state 基态guinea and feather experiment 「硬币与羽毛」实验Hhair spring 游丝half adder 半加法器half-life 半衰期half-silvered mirror 半镀银镜half-wave rectification 半波整流half-wave rectifier 半波整流器Hall effect 霍耳效应Hall probe 霍耳探测器Hall voltage 霍耳电压hand stroboscope 手动式频闪观测器harmonic 谐音harmonic motion 谐运动harmonic oscillation 谐振荡head-on collision 对正碰撞，正碰heat 热，热量，加热，热学heat absorbent 吸热剂heat absorber 吸热器heat absorption 吸热，热吸收heat capacity 热容量heat conduction 热传导heat exchange 热交换heat flow 热流heat gain 热增益，得热heat insulation 热绝缘，隔热heat loss 热损耗，失热heat proof 耐热的，隔热的heat pump 热泵heat radiation 热辐射heat reservoir 热库，储热器heat sink 热壑heat transfer 热传递，热转移heater 发热器，加热器heating effect 热效应heating element 发热组件Helmholtz coils 亥姆霍兹线圈henry 亨利，亨hertz 赫兹，赫high dispersion prism 高色散棱镜high tension 高电压hole 空穴，空子hollow plastic lens 空心塑料透镜hollow plastic prism 空心塑料棱镜hologram 全息图holography 全息术，全息学Hooke's law 虎克定律horizontal 水平horizontal component 水平分量horizontal deflection 水平偏转horseshoe magnet 蹄形磁铁hot cathode 热阴极hour 小时Huygens' principle 惠更斯原理hydraulic press 水压机hydroelectric power 水力发电hydrogen bomb 氢弹hygrometer 湿度计hyperbolic orbit 双曲线轨道hypodermic needle 皮下注射针头hypodermic syringe 皮下注射针筒hypothesis 假说，假设hysteresis 滞后现象Iideal gas 理想气体ideal gas equation 理想气体方程ideal gas temperature scale 理想气体温标ideal machine 理想机械illuminate 照明，照亮image 像image distance 像距immerse 浸没immersion heater 浸没式电热器impact 碰撞impedance 阻抗impulse 冲量impurity 杂质in focus 焦点对准in parallel 并联in phase 同相in series 串联incident ray 入射线 incident wavefront 入射波阵面，入射波前inclined plane 斜面incoherent 不相干的incompressible fluid 非压缩性流体indicator 指示器indirectly heated cathode 旁热式阴极induced charge 感生电荷induced current 感生电流induced e.m.f. 感生电动势induced voltage 感生电压 inducing charge 施感电荷inducing current 施感电流inductance 电感inductance capacitance coupled circuit 感容耦合电路inductance coil 电感线圈induction 感应induction heating 感应生热inductive circuit 电感电路inductive component 电感性分量inductive reactance 感抗inductor 电感器，感应器inelastic collision 非弹性碰撞inert gas 惰性气体inertia 惯性，惯量inertia balance 惯性秤inertial frame 惯性坐标系，惯性系inertial mass 惯性质量infra-red detector 红外线探测器infra-red radiation 红外辐射infra-red ray 红外线 initial state 初态initial velocity 初速度input 输入input bias current 输入偏压电流input characteristic 输入特性input current 输入电流input offset current 输入补偿电流input power 输入功率input resistance 输入电阻input voltage 输入电压input-output voltage characteristic 输入—输出电压特性instantaneous acceleration 瞬时加速度instantaneous angular velocity 瞬时角速度instantaneous current 瞬时电流instantaneous power 瞬时功率instantaneous speed 瞬时速率instantaneous velocity 瞬时速度instantaneous voltage 瞬时电压insulation 绝缘insulator 绝缘体integrated circuit 集成电路intensity 强度intensity control 强度控制intensity of current 电流强度interaction 相互作用interatomic force 原子间力interatomic potential 原子间势，原子间位interatomic separation 原子间距intercept 截距，截段interconversion 互换interference 干涉interference pattern 干涉图形internal energy 内能internal force 内力internal resistance 内电阻internal work 内功international system of units 国际单位制，公制，十进制interval 间隔intrinsic semiconductor 纯半导体，本征半导体inverse-square law 平方反比定律inverted 倒立的inverter 反相器，倒换器inverting input 反相输入ion 离子ion-pair 离子偶，离子对ionic bond 离子键ionic structure 离子结构ionization 电离作用ionization chamber 电离室ionization current 电离电流ionization energy 电离能ionization potential 电离电势，电离电位ionization voltage 电离电压ionize 电离ionized atom 离子ionized layer 电离层ionizing power 致电离能力，致电离本领ionizing radiation 致电离辐射ionosphere 电离层iris 虹膜，可变光阑iron core 铁心iron filings 铁粉irreversible process 不可逆过程isobar 等压线，同质异序素isobaric expansion 等压膨胀isobaric process 等压过程isochronous oscillation 等时振荡isotherm 等温线 isothermal process 等温过程isotope 同位素isovolumetric process 等容过程JJaegers method 耶格法jet propulsion 喷气推进jockey 滑动触头joule 焦耳joulemeter 焦耳计junction 连接，接头junction diode 面结型二极管junction transistor 面结型晶体管KKaleidoscope 万花筒Kelvin 开尔文，开Kelvin temperature scale 开氏温标Kepler's law 开普勒定律key 电键kilogram 千克kilowatt 千瓦特，千瓦kilowatt-hour 千瓦小时，千瓦时kilowatt-hour meter 电表，千瓦时计kinematics 运动学kinetic energy 动能kinetic friction 动摩擦kinetic theory 分子运动论kinetic theory model 分子运动模型kinetic theory of gases 气体分子运动论Kirchhoff's law 基尔霍夫定律kit 套件knife-edge 刃形支承，刀刃，刀边kryton 氪Kundt's tube 孔脱管Llagging 保温套laminar flow 层流laminated 分层的，迭片的laser 激光，激光器laser beam 激光束laser material 激光材料latch 闩锁latent heat 潜热lateral 横向，侧向，旁向lateral inversion 横向倒置lateral magnification 横向放大，横向放大率lateral search coil 横向探察线圈lattice 点阵，晶格lattice spacing 点阵间隔，点阵间距law 定律law of conservation of momentum 动量守恒定律law of reflection 反射定律law of refraction 折射定律lead 导线，铅lead-acid accumulator 铅酸蓄电池leakage current 漏泄电流least distance of distinct vision 最小明视距离Leclanche cell 勒克朗谢电池length 长度lens 透镜，晶体，晶状体lens formula 透镜公式lens holder 透镜座。
基于传递函数法的材料吸声系数测试
一、概述随着工业化和城市化的不断发展，环境噪声污染问题日益突出，对建筑、交通工具等各种场所的噪声控制要求也日益严格。
材料吸声是一种重要的噪声控制方法，它能够有效减少建筑、车辆等设施中的噪声污染，改善人们的生活环境。
材料吸声系数是评价材料吸声性能的重要指标，准确测定材料吸声系数对于评估材料吸声性能、设计吸声结构具有重要意义。
二、传递函数法测定材料吸声系数的原理传递函数法是一种常用的测定材料吸声系数的方法。
其基本原理是利用声学传递函数，通过测量样品前后的声压级差，计算得到材料的吸声系数。
具体步骤如下：1. 准备测试设备：传递函数法需要使用声学传递函数测试系统，包括声源、声学吸声材料、声学传感器等设备。
2. 测定传递函数：在实验室中设置好测试设备，采用标准的声学传递函数测试方法，测定样品前后的声压级差。
3. 计算吸声系数：利用传递函数法得到的声压级差数据，结合已知的声学参数，通过计算得到材料的吸声系数。
三、传递函数法测定材料吸声系数的优势传递函数法测定材料吸声系数具有以下优势：1. 高精度：传递函数法采用先进的声学传递函数测量系统，能够实现对材料吸声系数的高精度测定。
2. 客观性：传递函数法是一种客观的测定方法，不受测试人员主观因素的影响，可以保证结果的客观性和可靠性。
3. 适用性广：传递函数法适用于各种类型的吸声材料，能够满足不同场合的吸声性能评价需求。
四、传递函数法测定材料吸声系数的应用传递函数法测定材料吸声系数已经广泛应用于建筑、汽车、航空航天等领域。
在建筑行业，传递函数法能够帮助评估吸声材料的性能，指导建筑吸声结构的设计和施工。
在汽车制造领域，传递函数法能够帮助汽车制造商评估车内吸声材料的性能，改善车内空间的声学环境。
在航空航天领域，传递函数法则能够帮助航空航天制造商评估飞机内外的吸声材料的性能，提高飞机的安静性。
五、结论传递函数法是一种重要的测定材料吸声系数的方法，具有高精度、客观性和适用性广的优势，已经得到广泛应用。
ECE R117 第1版
Tyres designed for competitions;
Tyres intended to be fitted to road vehicles of categories other than M, N and O;
Tyres fitted with additional devices to improve traction properties (e.g. studded tyres);
E/ECE/324 E/ECE/TRANS/505 Regulation No. 117 page 4
} Rev.2/Add.116/Rev.1
CONTENTS (continued)
Annex 2 - Arrangement of approval marks
Annex 2 - Appendix 1 - Approval according to Regulation No. 117 coincident with approval to Regulations Nos. 30 or 54
Agreement Concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts, done at Geneva on 20 March 1958.
8. Conformity of production .......................................................................................... 14
轻木木材吸声性能的研究
轻木木材吸声性能的研究 余 珊 王军锋 陈 悦 栾 洁摘要： 以世界上密度最小的轻木为研究对象，采用基于传递函数法理论的阻抗管研究轻木木材吸声性能与纹理方向、材料厚度、含水率、背后空气层厚度的关系。
结果表明：轻木木材的横切面吸声性能最好；在一定范围内增加材料的厚度，吸声性能增大；纤维饱和点以下时轻木木材的吸声性能远大于纤维饱和点以上；增加材料背后空气层厚度，吸收峰往低频方向移动。
关键词： 轻木； 阻抗管； 吸声性能中图分类号：S781.38 文献标识码：A 文章编号：1001-5299 （2018） 08-0033-03DOI:10.19531/j.issn1001-5299.201808008Research on the Sound Absorption Properties of Balsa WoodYU Shan1 WANG Jun-feng2 CHEN Yue1 LUAN-Jie2 （1. Planning & Design Institute of Forest Products Industry, SFA, Beijing 100010, China2.GuangXi Forestry Research Institute, Nanning 530002, China） Abstract: Taking balsa wood as experimental material ,the relations between balsa wood's sound-absorbing properties and texture, thickness , the moisture content, air cavity depth behind the material were investigated by using impedance tube method. The results show that the sound absorption performance on the cross-section in grain direction was the best. The sound absorption coefficient increased with increasing the thickness of the balsa wood. The wood's sound-absorbing properties that its moisture content was under fiber saturation point, was higher than that its moisture content was above fiber saturation point. As the thickness of the tested wood increased the peak of sound absorption coefficient moved toward the low-frequency direction.Key words: Balsa wood; Impedance tube; Sound absorption performance木材具有重量轻、强重比高、弹性好、耐冲击、纹理美观，易加工等优点[1]，其主要由纤维素、半纤维素和木质素构成，是一种毛细管-多孔性-胶体材料。
福师1203考试批次《现代语言学》复习题及参考答案
福师1203考试批次《现代语言学》复习题及参考答案一本课程复习题所提供的答案仅供学员在复习过程中参考之用，有问题请到课程论坛提问如学员使用其他版本教材，请参考相关知识点1.Sometimes bound morphemes can be used by themselves.2.There is a three-word sentence stage in first language acquisition.3. A simple sentence consists of a single clause which contains asubject and a predicate and stands alone as its own sentence. 4. A locutionary act is the act of conveying literal meaning by meansof syntax, lexicon, and phonology.nguage is entirely arbitrary.6.The naming theory of meaning was proposed by the ancient Greekscholar Plato.pounding is the addition of affixes to stems to form new words.8.All utterances take the form of sentences.9.Suffixes modify the meaning of the original word and in many caseschange its part of speech.10.The most basic element of meaning is traditionally called morpheme. II. Decide which one of the four choices best completes the statement.1.The pharynx refers to the space of cavity between the larynx and theend of ____.A. tongueB. hard palateC. soft palateD. vocal cords2.Morphemes that represent “tense”, “number”, “gender”,“case” and so forth are called ____ morphemes.A. inflectionalB. boundC. freeD. derivational3. The fact that ability to speak a language is transmitted from generation to generation by a process of learning, and not genetically is usually referred to as ____.A. performanceB. language acquisitionC. cultural transmissionD. competence4. The sound [s] and [z] are the results of air escaping under frication between tongue and ____ before passing through the teeth.A. hard palateB. uvulaC. alveolar ridgeD. soft palate5.____ deals with language application to other fields, particularlyeducation.A. Linguistic geographyB. Applied linguisticsC. SociolinguisticsD. Comparative linguistics6. Vowels that are produced between the positions for a front and back vowel are called ____ vowels.A. openB. closeC. frontD. central7、______ is defined as a conscious process of accumulating knowledge of a second language usually obtained in school settings.A. CompetenceB. PerformanceC. LearningD. Acquisition8、______ act theory is an important theory in the pragmaticstudy of language.A. SpeakingB. SpeechC. SoundD. Spoken9. A ______ analysis of an utterance will reveal what thespeaker intends to do with it.A. semanticB. syntacticC. pragmaticD. grammatical10.The most basic element of meaning is traditionally callen______A. morphemeB. syntacticC. pragmaticD. grammaticalIII. Dissect the following words into morphemes. (2*5=10)1. though _______________ _______考核知识点：morpheme，参见P19-222. speeches _________________ _____ 考核知识点：morpheme，参见P19-223. geography ___________ ___________ 考核知识点：morpheme，参见P19-224、morpheme___________ ___________ 考核知识点：morpheme，参见P19-225、syntactic___________ ___________ 考核知识点：morpheme，参见P19-22IV. Define the following terms. (5*6=30)1. the telegraphic stage考核知识点：language acquisition，参见P482. language考核知识点：language ，参见P33. discreteness考核知识点：discreteness参见P94. vowel考核知识点：vowel，参见P145. internal structure考核知识点：internal structure，参见P22V. Answer the following questions. (15*2=30)1. Why do we say language is arbitrary?考核知识点：arbitrary，参见P5参考答案要点：Arbitrariness in narrow sense refers to the lack of physical，logical or natural connection(i．e．the inexplicability of the relationship)between individual linguistic symbols and the meanings they symbolize．We know people use linguistic symbols which are originally meaningless to refer to something meaningful．There is no physical，’logical or natural connection between the symbolic signs used in language and the meaning they stand for．It is inexplicable．Wecan’t explain why the English people use‘'water'’to refer to the stuff in this bottle．Similarly,we can’t explain why the Chinese people use“水”to refer to the stuff．So language is arbitrary in nature．2. What’s the difference between langue and parole?考核知识点：langue and parole，参见P3-10参考答案要点：Language is full ofvarieties：no two speakers speak in an identical manner；no two speakers have an identical learning experience．Language consists in its varieties，that is to say,language is realized through its varieties(cp．the relation．between fruit and apple，between phoneme and allophones and phones and between langue and parole．福师1203考试批次《现代语言学》复习题及参考答案二本课程复习题所提供的答案仅供学员在复习过程中参考之用，有问题请到课程论坛提问如学员使用其他版本教材，请参考相关知识点I. Decide whether each statement is true (T) or false (F). (15 points,1.5 points for each)1、Linguistics is generally defined as the scientific study of language..2、Language is not only linearly-structured.3、Linguistic performance is essentially a social phenomenon and alsoa context-dependent behavior.4、General linguistics studies the basic concepts, theories,5、descriptions, models and methods applicable are not in any linguistic study.6、Some languages are not superior to other languages.7、Compounding is the addition of affixes to stems to form new words.8、 Not all utterances take the form of sentences.9、Morphemes modify the meaning of the original word and in many cases change its part of speech.10、The most basic element of meaning is traditionally called morphe. 参考答案：1-5 F T F T F 6-10 T F T T FII. Choose the ONE choice that best completes each statement. (20 points,2 points for each)1.Whcih of the following best states the behaviorist view of childlanguage acquisition?_______.A. Language acquisition is a process of habit formationB. Language acquisition is the species-specific property of humanbeingsC. Children are born with an innate ability to acquire languageD. Humans are equipped with the neural prerequisites for language and language use参考答案B2.The pair of words "lend"and "borrow"are ___.A.gradable oppositesB.relational oppositesC.co-hyponymsD.synonyms参考答案B3. The discovery of Indo-European language family began with the workof the British scholar .A.Jacob GrimmB.Rasmus RaskC.Franz BoppD.Sir William Jones参考答案D4. A linguist regards the changes in language and language use as __.A.unusualB.something to be fearedC.abnormalD.natural参考答案D5. __produce fast and fluent speech with good intonation andpronunciation but the content of their speech ranges from mildly inappropriate to complete nonsense,often as unintelligible.A.Broca"s aphasicB.The linguistic deprivationC.The damage on the angular gyrusD.Wernicke"s aphasic参考答案D6.Some Southern learners of English in China tend to say "night" as"light".This shows: .A.They cannot pronounce/n/B. Interlangue interference because there is notthe sound /n/in theirmother tongueC.The teachers do not have a good teaching methodD.They do not like to pronounce nasal sounds参考答案B7.. A word with several meanings is called __word.A.a polysemousB.a synonymousC.an abnormalD.a multiple参考答案A8.. The function of the sentence "A nice day, isn"t it?"is __.rmativeB.phaticC.directiveD.performative参考答案B9. The most recognizable differences between American English andBritish English are in __ and vocabulary.ageB.grammarC.pronunciationD.structure 参考答案C10. __deals with the way in which a language varies through geographicalspace.A.Linguistic geographyB.LexicologyC.LexicographyD.Sociolinguistics参考答案AIII. Define each of the following terms. (30 points, 6 points for each) 1. phonetics考核知识点：phonetics，参见P122. phoneme考核知识点：phoneme，参见P163. stress考核知识点：stress，参见P174.reference考核知识点：reference，参见P355. idiolect考核知识点：idiolect，参见P41Answer the following questions. (35 points)1. How, in your opinion, does pragmatics differ from semantics?考核知识点：pragmatics and semantics，参见P28-35参考答案要点：Pragmatics is the study of the meaning which is not included in semantics and whose interpretation is dependent on its social contexts．Semantics is the science of meaning．Semantics is concemed t11 encoding and decoding of meaning，(finding out how people encode their meaning and how people try to interpret their meaning)，identifying and classifying meanings，lexical meaning，sentential meaning，and utterance2. What’s the difference between sense and reference?考核知识点：sense and reference，参见P35参考答案要点：There are two different meanings of meaning：sense(the meaning that relates linguistic forms with what is in the non．1inguisticworld)and reference(the meaning that lies in the relation or contrasts among linguistic forms themselves，i．e．how the meanings are divided by the different linguistic forms／how different linguistic forms may be used to express meanings)．3. Explain language production with some examples.考核知识点：language production，参见P51参考答案要点：Language production is more difficult to study than language comprehension for the following reasons：the way thoughts are turned into speech(We don’t know how thoughts are turned intospeech．)；indirect approach through analyzing errors in speech production(We can only use this indirect approach to infer from these errors how we produce speech．)Following Carroll’s model of speech production,there are four stages：construction of thought to be expressed(You must have something in your mind to be expressed)，formation ofthought into linguistic forms(When you have some thought,you should turn it into linguistic forms)，construction of a motor command for the utterance(You need to prepare the command for the speech organs to speak)，execution ofthat motor command(You’re actually saying what you want to say)．福师1203考试批次《现代语言学》复习题及参考答案三本课程复习题所提供的答案仅供学员在复习过程中参考之用，有问题请到课程论坛提问如学员使用其他版本教材，请参考相关知识点I. Decide whether each statement is true (T) or false (F). (15 points,1.5 points for each)11.Sometimes bound morphemes can be used by themselves.12.There is a three-word sentence stage in first language acquisition.13.A simple sentence consists of a single clause which contains asubject and a predicate and stands alone as its own sentence. 14.A locutionary act is the act of conveying literal meaning by meansof syntax, lexicon, and phonology.nguage is entirely arbitrary.16.Articulatory phonetics that studies speech sounds from a physicalpoint of view, focusing on their physical properties intransmission.17.In speech sound production, lower part of the oral cavity arerelatively stable and function as a foil to the upper part in itsarticulatory movements.18.Consonants are sounds made by a closure or narrowing somewhere inthe vocal tract.19.Stress may play different functions in different languages.20.Affixation changes the grammatical class of the word.参考答案1-5 F T F T F 6-10 F F T T FII. Choose the ONE choice that best completes each statement. (20 points, 2 points for each)3.The pharynx refers to the space of cavity between the larynx and theend of ______.A. tongueB. hard palateC. soft palateD. vocal cords4.Morphemes that represent “tense”, “number”, “gender”,“case” and so forth are called ______ morphemes.A. inflectionalB. boundC. freeD. derivational3. The fact that ability to speak a language is transmitted fromgeneration to generation by a process of learning, and not geneticallyis usually referred to as ______.A. performanceB. language acquisitionC. cultural transmissionD. competence4. The sound [s] and [z] are the results of air escaping under fricationbetween tongue and ______ before passing through the teeth.A. hard palateB. uvulaC. alveolar ridgeD. soft palate6.______ deals with language application to other fields, particularlyeducation.A. Linguistic geographyB. Applied linguisticsC. SociolinguisticsD. Comparative linguistics6. Language has that distinguish it from other semiotic systemsused by humans and animals.A. functionB. design featuresC. importanceD. performance7. the main source of energy for speaking, initiating the airflowfor speech, hence pulmonic airstream mechanism.A. MouthB. HeartC. NoseD. Lung8. The phones that can be grouped together as variants of one phonemehave to be similarA. phoneticallyB. phonologicallyC. soundD. seem9. morpheme is a morpheme that contributes to the lexical meaningof the word.A. FunctionalB. LexicalC. GrammaticalD. Performative10. According to , language determines the framework of speaker’sperception and thought.A. Sapir-Whorf HypothesisB. Positivist theoryC. Use theoryD. Speech Acts theory 参考答案1-5 C A D A B 6-10 B D AB AIII. Define each of the following terms. (30 points, 6 points for each) 1. pragmatics考核知识点：pragmatics，参见P352. semantics考核知识点：semantics，参见P283. phonology考核知识点：phonology，参见P154. linguistics考核知识点：linguistics，参见P105. syntax考核知识点：syntax，参见P22Answer the following questions. (35 points)1. What is psycholinguistics?考核知识点：psycholinguistics，参见P48参考答案要点：Psycholinguistics is the study of the relation between language and mind，especially language acquisition and learning，and language comprehension and production．2. What’s the difference between free morpheme and bound morpheme? 考核知识点：free morpheme and bound morpheme，参见P20参考答案要点：Morpheme may also be classified according to their role in word formation．Inflectional morpheme is a bound morpheme that shows the inflectional changes of the wordand that expresses a certain grammatical meaning．Most of inflectional morphemes in English arerealized through their allomorphs，e．g．{past tense}-->一ed,一d，…An inflectional morpheme doesnot change the grammatical class ofthe word，e．g．{change)change is a verb，and{change)+{pasttense)is still a verb．Derivational morpheme is a morpheme that is added to a word to form a new word．Derivational morpheme may be a bound morpheme such as affixes，but it may also be a freemorpheme such as those used to form a compound．There are six key terms used in derivational3. Explain pidgin and creole with some examples.考核知识点：pidgin and creole，参见P43参考答案要点：Pidgin refers to a kind of lingua franca which is also known as“marginal language”．It has areduced grammatical structure，lexicon and stylistic range and has no native speakers．Theformation of a pidgin usually involves two or more speech communities and requires considerable motivation on the part of the speaker．Pidgin usually flourishes in areas of economic development and of substantial trading among different speech communities．Pidgin English used in trading among the English and the Chinese in Shanghai in the old days．Pidgin English used in Asia in trading includes elements from Malay,Chinese and精品文档。
2022年9月英语六级真题及参考答案
2022年9月英语六级真题及参考答案英语六级试卷采用多题多卷的形式，大家核对答案时,找出具体选项，忽略套数。
无忧考网搜集整理了各个版本，仅供大家参考。
【听力】Conversation 1M: Welcome to Money Matters - a weekly program that helps you manage your money. Tonight, I'll be talking to Mary Johnson about budgeting.W: Hello, everyone.M: There's a magic about money, when it's not planned for, tracked and kept the record of, it literally disappears.What are some of the steps we can take to prevent this from happening?W: Well, it's all about keeping track of your money.If you don't do that, you'll never be able to set any goals for your budget or have the discipline to stick to them.M: That's easier said than done. I read recently that only 41% of Americans adhere to a budget.W: Yes, but knowing what you earn and what you spend can give you reassurance that you won't get into debt in the first place. You can do this by adding up all of your sources of income you have, and writing them all down on a piece of paper. On the same page, write down all of your monthly expenses.M: I'm always amazed at how much my expenses add up.But designating each item asan income or an expense really helps me have a much better sense of all my spending. W: Right. Most people have no idea how much they spend each day, let alone each week or month, no matter how careful they are. Next, subtract your monthly expenses from income. If the result is positive, you are living within your means. If the result is a negative number, you're going to have to cut back on your spending.M: I'm usually a negative number. I just can't resist the allure of all those prestigious goods.W: Well, it's not a catastrophe, but you do have to make some changes. Try cutting back on those non-essential items, sell some stuff in your attic or shop online to avoid unnecessary temptations like chocolate. Failing that you can always find yourself a part-time job.Q1: What does the man say about the weekly program?Q2: What did the man read recently?Q3: What does the woman suggest the man do first to avoid getting into debt?Q4: What does the woman say about online shopping?Conversation 2M: Hi there. I've come to see the flat. My name is Mark Adams. We spoke on the phone on Wednesday.W: Hi Mark. Come on up. I'll buzz you in green door, on the second floor on the right side. Nice to meet you. I spoke to all your references and they all checked out Okay.So let me show you around the place actually belongs to my mother, but her health isn't great. So we finally managed to persuade her to move in with us and rent this old place out.M：It's a great size, plenty of space, very versatile. I think it's a winner for us.W: Yes. All the appliances are brand new. There's a washing machine and a tumble dryer in the utility room next to the kitchen.M: Lots of closet space two, which is fabulous. My wife has a ridiculous number of shoes. Now, the big question What about noise and the neighbors?W: Well, all the neighbors are elderly, so no noisy kids and the back of the house overlooks a clear and peaceful pond. So it's perfect. If tranquility is what you are looking for.M: That's good news. We've been living in a less than glamorous part of Aberdeen, constantly harassed day and night by noisy neighbors. Getting to work was a nightmare too. As we only have one car. And my wife has to use it as she works nights at the hospital.W: Well, if you like the place it's yours. As soon as I get a contract drawn up with the solicitor, the first month's rent and a deposit are mandatory on signing the contract, then we can work out when is the best day for you to pay rent each month? M: We'll be incredibly happy to be your new tenants. Thank you so much. My wife will be thrilled to get out of the shabby place we are now in and start filling those wardrobes with all those shoes.Q5: What does the woman say about the flat question six?Q6: What is the man's chief consideration in looking for a flat?Q7: What does the man have to do on signing the contract?Q8: Why does the man say his wife will feel very excited if they move into the flat?Passage 1A new study has found a positive correlation between how much television children watch and their parents stress levels. Why? Because the more television kids watch, the more they're exposed to advertising .The more advertising they see, the more likely they are to insist on purchasing items when they go with their parents to the store.This could generate conflict if the parents refuse. All that researchers say can contribute to parents overall stress levels. What's the solution ? Perhaps the most obvious is curtailing screen time.Commercial content is there for a reason :to elicit purchasing behavior, so parents might want to shut off the TV. Researchers can see that this is easier said than done. So they suggest another option. Parents can change how they talk to their kids about purchases. The researchers suggest that parents seek input from their children on family purchasing decisions.They shouldn't try to control all purchases. Instead, parents might tell their children things like: I will listen to your advice on certain products or brands. This type of communication, the researchers assert, can lead to children, making fewer purchasing demands- that means less parent stress. However,the protective effect of this kind of communication diminishes with greater exposure to television. This is because advertising aimed at children is especially persuasive. Advertisers use an assortment of tactics, such as bright colors, happy music and celebrity endorsements to appeal to children. Plus children don't have the cognitive ability to fully understand advertising's intent that makes them particularly vulnerable to advertisements.Q9: What has the new study found about children watching television?Q10:What are parents advised to do to reduce the impact of TV commercials?Q11: What makes children particularly vulnerable to TV commercials?Passage 2Everyone is supposed to cheer for good guys. And we should only punish the bad guys, but that's not what we always do. Most of the time we do indeed reward good people. We also often punish people who harm others or who aren't good team players, but sometimes the good guys also get punished or criticized specifically because they are so good. This seems baffling because it's detrimental to group cooperation. However, the phenomenon has been discovered in multiple fields and it has been found in every society. Why does this happen? Research suggests a simple reason when one person looks really good, others look bad by comparison. Those others then have an incentive in stopping that person from looking good, especially if they can't or won't compete. After all, we're all judged in comparison with others. When facedwith someone better, what can a normal person do? One option is to actively compete.A second option is to bring that person down that is to suppress their cooperation or work ethic, and first selfish motives for their actions or imply real or imagined hypocrisy. Other tactics include attacking them on unrelated dimensions or punishing them outright. Why does this matter? Critics often attack the motives of people who protect the environment, donate money or work too hard. Such good deeds are dismissed as naive or hypocritical by those who do not perform those deeds. This criticism may ultimately discourage people from doing good deeds.so it's important to recognize these attacks for what they are.Q12: What baffling phenomenon is discussed in the passage?Q13: How are we all judged according to the passage?Q14: What can a normal person do when faced with people who perform better?Q15: what may discourage people from performing good deeds?Lecture 1 雪萱In America, most researchers can see that boys and girls are brought up in different ways, taught different skills and rewarded for different acts. Women, it is agreed excel at certain tasks, men at others. There is little argument that some personality traits appear more dominant in one sex than in the other.All of this, not withstanding, gender differences are very much in the media these days. Since the rise of the women's movement, gender role behavior has come under closer scrutiny. How has this affected friendship? How do the sexes differ in theirfriendship relations? Most preteen children have a best friend who is usually some one of the same sex and similar age.Both sexes share an essentially positive recollection of these childhood friendships, they do not differ in this respect. However, the type of play engaged in during these early friendships is telling of the difference to come. Boys tend to form playgroups that are competitive in nature. Girls groups more frequently revolve around cooperative enterprises. Thus at an early age, boys become concerned with trying hard and winning, while girls by contrast play house and school, engaging in roles that require complimentary support. Speaking of their childhood, men recall being highly responsive to and aware of the gender role opinions of other boys. Girls in preteen years appear to be less susceptible to gender role pressure. It is not until the dating years that women report being concerned with feminine behavior. Males for the most part are responsive to the suggestion that their behavior is unmanly at almost any age. These early attitudes reinforced by social conditioning continue to play an active part in the friendships of both sexes during adolescence. This is a period when the majority of males, once again, report a close Alliance with same sex friends.Now, however, with heightened intensity, considerable energy is devoted to competing for position and a definite undercurrent of competition permeates the relationship. Although in dissimilar fashion, females share equally fragile relationships at this age. For them, the bond of loyalty extends only to the line of romantic involvement.This is most apt to be the case in late adolescence when dating and relationships with boys take sharp precedence over sisterhood. Actually dating dilutes the intensity of samesex friendships for men also. For the majority of us, the moment we begin to date seriously, there's a competition between romance and friendship.Q16: What does the speaker say about most preteen children?Q17: What do most males devote much of their energy to during adolescence?Q18: What do children do when they reach late adolescence?Lecture 2Good afternoon. In today's lecture, we'll be talking about how and when to disclose a disability when applying for a job. On average, about 20% of the population has some form of disability. Most countries these days have equal opportunity and non-discrimination laws, yet disabled people often find it hard to decide when, how, and if at all to raise their disability problem with a potential employer. There is uncertainty about how a recruiter will perceive their disability as such many candidates fear they wouldn't be considered for a position as a result of disclosing this personal information. And research has validated this as a genuine concern for many job applicants. It’s a natural reaction, but it shouldn't be a reason to stay quiet. People need to remember that they are applying for a position they have the skills and experience to.Discussing a disability with a potential employer may help them make reasonable workplace adjustments in their favor. It's most appropriate to discuss a disabilitywhen they reply to confirm an interview, this information needed to be put up front in their cover letter or resume. because it's probably not relevant to the position itself. Candidates with disabilities should feel they have the power to make their own decisions around sharing this information free from prejudice. If they find an organization that doesn't celebrate diversity and inclusion, it could say a lot about the company's culture, perhaps the organization isn't the right fit. It's important for them to. remember That they are seeking a manager, an employer that's going to be supportive and continue to give them a great employment experience. Companies sometimes offer candidates the chance to disclose disabilities on their application form, but people shouldn't feel restricted by this method or timing. People should avoid sharing the name of their disability or condition. There is always the risk that the recruiter will research inform that is inaccurate or irrelevant. If people don't think their disability will impact their ability to perform in the advertised position, then it's entirely their entitlement to choose when and whether to share this information.Q19: Why do disabled job applicants feel reluctant to disclose their disability information?Q20: When does the speaker suggest applicants reveal their disability information? Q21: What are people advised to do when filling out their job application form?Lecture 3Smartphones Distract attention and reduce learning because of their potential to offer activities more inviting than study.But what about background sound alone?A group of American researchers compared students' comprehension of verbal material when reading in the presence of background speech, instrumental music or general noise.General noise is neutral such as that from the sound of an air conditioner or fan. Student scores were most depressed in the presence of background speech. Comprehension was slightly better with the presence of music than with speech. However, when they were asked to identify melodies rather than understand text background music interfered more. When the background speech was in a language unfamiliar to participants, there was little, if any hindrance of reading comprehension.British researchers compared the effects of background speech, vocal music, instrumental music, general background noise and silence on short term memory. Background speech had the biggest negative effect. Vocal music was slightly more disruptive than instrumental.In general background noise and silence were least disrupt.It seems the degree of interference from background noise depends on the overlap between the processing required on the task and the processing required to screen out the background noise.The studies suggest that when people read and when they try to remember any verbal material, background speech will inhibit their ability.Instrumental music will have at worst a slight effect.When students write essays, however,other research has found it is best to reduce all background noise as much as possible.Not everyone reacts in the same way to distractions.Other studies suggest some aspects of personality may make a difference.The researchers subjected shy, quiet people and confident, outgoing ones to high arousal or low arousal background music, general noise or silence while asking them to remember words.Everyone performed best in the silent condition, but less sociable people were more negatively affected by each of the distractions.So when children are reading and trying to incorporate new material, parents could consider allowing some background music, particularly if it is instrumental and their child is the outgoing type.Q22: What did some American researchers find about students reading comprehension in the presence of background noise?Q23: What do we learn from the British researchers about the degree of interference from background noise?Q24: What is best for students to do when writing essays according to some research?Q25: How do people of different personalities react to distractions according to other studies?听力参考答案1.C) It helps people with budgeting.2.D) Most Americans do not stick to a budget.3.A) Keep track of his money.4.B) It helps avoid unnecessary spending.5.C) It belongs to her mother.6.B) Tranquility.7.B) Pay the first month's rent and a deposit.8.D) She will have plenty of space for her shoes.9. D) The more television they watch, the greater their parents' stress.10. C) Involve children in making purchasing decisions.11. A) Their limited cognitive ability.12）D Good guys may get unfair treatment13) C In comparsion with others14) B Compete with them actively15) A Being dismissed as hypocritical16.D) They make friends with peers of the same sax.17. A) Competing for position.18. A) They prioritize romance over friendship.19. B) They are worried about being turned down.20. C) When confirming an interview.21. D) Avoid mentioning the name of their disability.22.B) It was the poorest when there was background speech.23.C) It depends on the overlap in processing different kinds of information.24.A) Keep everything as quiet as possible.25. B) Shy quiet people were most adversely impacted.【阅读】词汇理解（1）文章开头开头：The now extinct passenger pigeon has the dubious honor of being the last species anyone ever expected to disappear.（2）答案【答案速查】26-30 LAIMO 31-35 BCHND26. L) estimates27. A) vulnerable28. I) hatched29. M) edible30. O) delicacy31. B) unprecedented32. C) tracts33. H) infinite34. N) depleted35. D) specimen长篇阅读（1）文章标题标题：Is computer coding a foreign language?（2）答案速查36-40 LEKGD 41-45 HBJCM（3）题干、答案和定位处36. Employers attach more importance to applicants' computer skills than their language competence.36. L 【定位】Even with the benefits and skill sets languages provide, recruiters and employers value computer skills more.37. One U.S. state senator proposed that high school students be allowed to study either foreign language or computer coding.37. E【定位】“I think the opportunity to give people a choice is important," says Florida state Senator Jeremy Ring.might as well do computer coding."38. Learning languages broadens students' international perspective and nurtures mutual respect among peoples, according to a high school language teacher.38. K【定位】 We need to find a way to put ourselves at the global table and to treat each other with mutual respect.39. One U.S. state will see to it that programming classes are taught by quality teachers.39. G 【定位】 Instead, the state will provide support for higher quality teachers for programming classes.40. Statistics show while computer-related jobs have been on the rise, foreign languages have become less appealing to American students since mid-1990s.40. D 【定位】Foreign language interest, on the other hand, is declining for the first time since 1995.41. All school subjects are said to be essential to students' well-rounded development.41. H 【定位】…because every subject, whether art, math or language. is a significant contribution to a well-rounded existence.42. There is consensus among most educators that coding should be taught in schools but should not replace foreign language.42. B【定位】Coding should be added to curriculums, but not at the expense of foreign language classes.43. One study showed that foreign language learning improved students' academic performance.43. J【定位】Studies show that bilingualism (双语) correlates with cognitive development, intelligence, memory and problem solving abilities, according to the American Cou44. Being short of funding and qualified teachers, schools lag behind the fast developing computer science field.44. C 【定位】The computer science field is growing faster than schools can keep up because of budget constraints and a lack of skills training for teachers. 45. A distinguished high school language teacher also believes it is advisable to start learning a foreign language at an earlier age.45. M 【定位】I just think it's something you have to start early and not just have something that you do for a couple of years in high school," he says.Passage One（1）文章开头The U.S. and China don’t agree on much these days.（2）答案【答案速查】 46-50 DCABC（3）答案选项内容：46. D) How to stop tech companies from gaining monopoly.47. C) All companies must be regulated by the government.48. A) They can no longer do business independent of tech giants.49. B) They have considered regulatory action to promote fair competition.50. C) They are becoming untrustworthy.Passage Two文章开头：Born from the accessibility of mass air travel, modern答案速查：51-55 DBDAC51. What is the popular assumption about international tourism?D) It contributes to the economy of destination countries and regions.52. What do we learn from some studies about uncontrolled tourism development?B) It incurs local residents' antagonism to tourists.53. Why does the author say local residents of popular destinations often feel frustrated?D)They do not think they benefit as much as they deserve.54. How does the author say local residents in destination communities respond to tourism activity?A)They endeavor to adapt to it.55. What can tourists do to exert more positive impacts on the tourist destinations?C)Use the services provided by local businesses.【翻译】春联贴春联(Spring Festival couplets)是中国人欢度春节的一个重要习俗。
高二英语询问研究单选题50题
高二英语询问研究单选题50题1. In a research about the eating habits of high school students, the first step is to clearly define _____.A. what the research aims to achieveB. how to collect dataC. who will participate in the researchD. where to conduct the research答案：C。
解析：这道题考查研究的相关要素。
选项A是研究目的，虽然在研究中很重要，但第一步是确定研究对象，所以A错误。
选项B是关于数据收集的方式，这不是研究开始的第一步，B错误。
选项C，在研究高中生饮食习惯时，首先要确定谁来参与研究，也就是研究对象，C正确。
选项D是研究地点，这也不是研究开始首先要确定的内容，D错误。
2. A research on the influence of mobile phones on teenagers' study, we need to consider _____ as a key factor in the early stage.A. the types of mobile phonesB. the age range of teenagersC. the cost of mobile phonesD. the brand of mobile phones答案：B。
解析：对于研究手机对青少年学习的影响，在早期阶段关键因素是确定青少年的年龄范围，因为不同年龄段可能受影响的程度不同。
选项A手机类型不是早期关键因素，A错误。
选项C手机成本与对学习的影响关联不大，C错误。
选项D手机品牌也不是研究早期要考虑的关键，D错误。
3. When conducting a research on the effectiveness of a new teaching method, the researchers should first focus on _____.A. the popularity of the old teaching methodB. the characteristics of the students who will be taughtC. the cost of implementing the new teaching methodD. the time needed to complete the research答案：B。
专八英语阅读
英语专业八级考试TEM-8阅读理解练习册（1）(英语专业2012级)UNIT 1Text AEvery minute of every day, what ecologist生态学家James Carlton calls a global ―conveyor belt‖, redistributes ocean organisms生物.It’s planetwide biological disruption生物的破坏that scientists have barely begun to understand.Dr. Carlton —an oceanographer at Williams College in Williamstown,Mass.—explains that, at any given moment, ―There are several thousand marine species traveling… in the ballast water of ships.‖ These creatures move from coastal waters where they fit into the local web of life to places where some of them could tear that web apart. This is the larger dimension of the infamous无耻的，邪恶的invasion of fish-destroying, pipe-clogging zebra mussels有斑马纹的贻贝.Such voracious贪婪的invaders at least make their presence known. What concerns Carlton and his fellow marine ecologists is the lack of knowledge about the hundreds of alien invaders that quietly enter coastal waters around the world every day. Many of them probably just die out. Some benignly亲切地，仁慈地—or even beneficially — join the local scene. But some will make trouble.In one sense, this is an old story. Organisms have ridden ships for centuries. They have clung to hulls and come along with cargo. What’s new is the scale and speed of the migrations made possible by the massive volume of ship-ballast water压载水— taken in to provide ship stability—continuously moving around the world…Ships load up with ballast water and its inhabitants in coastal waters of one port and dump the ballast in another port that may be thousands of kilometers away. A single load can run to hundreds of gallons. Some larger ships take on as much as 40 million gallons. The creatures that come along tend to be in their larva free-floating stage. When discharged排出in alien waters they can mature into crabs, jellyfish水母, slugs鼻涕虫，蛞蝓, and many other forms.Since the problem involves coastal species, simply banning ballast dumps in coastal waters would, in theory, solve it. Coastal organisms in ballast water that is flushed into midocean would not survive. Such a ban has worked for North American Inland Waterway. But it would be hard to enforce it worldwide. Heating ballast water or straining it should also halt the species spread. But before any such worldwide regulations were imposed, scientists would need a clearer view of what is going on.The continuous shuffling洗牌of marine organisms has changed the biology of the sea on a global scale. It can have devastating effects as in the case of the American comb jellyfish that recently invaded the Black Sea. It has destroyed that sea’s anchovy鳀鱼fishery by eating anchovy eggs. It may soon spread to western and northern European waters.The maritime nations that created the biological ―conveyor belt‖ should support a coordinated international effort to find out what is going on and what should be done about it. (456 words)1.According to Dr. Carlton, ocean organism‟s are_______.A.being moved to new environmentsB.destroying the planetC.succumbing to the zebra musselD.developing alien characteristics2.Oceanographers海洋学家are concerned because_________.A.their knowledge of this phenomenon is limitedB.they believe the oceans are dyingC.they fear an invasion from outer-spaceD.they have identified thousands of alien webs3.According to marine ecologists, transplanted marinespecies____________.A.may upset the ecosystems of coastal watersB.are all compatible with one anotherC.can only survive in their home watersD.sometimes disrupt shipping lanes4.The identified cause of the problem is_______.A.the rapidity with which larvae matureB. a common practice of the shipping industryC. a centuries old speciesD.the world wide movement of ocean currents5.The article suggests that a solution to the problem__________.A.is unlikely to be identifiedB.must precede further researchC.is hypothetically假设地，假想地easyD.will limit global shippingText BNew …Endangered‟ List Targets Many US RiversIt is hard to think of a major natural resource or pollution issue in North America today that does not affect rivers.Farm chemical runoff残渣, industrial waste, urban storm sewers, sewage treatment, mining, logging, grazing放牧,military bases, residential and business development, hydropower水力发电,loss of wetlands. The list goes on.Legislation like the Clean Water Act and Wild and Scenic Rivers Act have provided some protection, but threats continue.The Environmental Protection Agency (EPA) reported yesterday that an assessment of 642,000 miles of rivers and streams showed 34 percent in less than good condition. In a major study of the Clean Water Act, the Natural Resources Defense Council last fall reported that poison runoff impairs损害more than 125,000 miles of rivers.More recently, the NRDC and Izaak Walton League warned that pollution and loss of wetlands—made worse by last year’s flooding—is degrading恶化the Mississippi River ecosystem.On Tuesday, the conservation group保护组织American Rivers issued its annual list of 10 ―endangered‖ and 20 ―threatened‖ rivers in 32 states, the District of Colombia, and Canada.At the top of the list is the Clarks Fork of the Yellowstone River, whereCanadian mining firms plan to build a 74-acre英亩reservoir水库，蓄水池as part of a gold mine less than three miles from Yellowstone National Park. The reservoir would hold the runoff from the sulfuric acid 硫酸used to extract gold from crushed rock.―In the event this tailings pond failed, the impact to th e greater Yellowstone ecosystem would be cataclysmic大变动的，灾难性的and the damage irreversible不可逆转的.‖ Sen. Max Baucus of Montana, chairman of the Environment and Public Works Committee, wrote to Noranda Minerals Inc., an owner of the ― New World Mine‖.Last fall, an EPA official expressed concern about the mine and its potential impact, especially the plastic-lined storage reservoir. ― I am unaware of any studies evaluating how a tailings pond尾矿池，残渣池could be maintained to ensure its structural integrity forev er,‖ said Stephen Hoffman, chief of the EPA’s Mining Waste Section. ―It is my opinion that underwater disposal of tailings at New World may present a potentially significant threat to human health and the environment.‖The results of an environmental-impact statement, now being drafted by the Forest Service and Montana Department of State Lands, could determine the mine’s future…In its recent proposal to reauthorize the Clean Water Act, the Clinton administration noted ―dramatically improved water quality since 1972,‖ when the act was passed. But it also reported that 30 percent of riverscontinue to be degraded, mainly by silt泥沙and nutrients from farm and urban runoff, combined sewer overflows, and municipal sewage城市污水. Bottom sediments沉积物are contaminated污染in more than 1,000 waterways, the administration reported in releasing its proposal in January. Between 60 and 80 percent of riparian corridors (riverbank lands) have been degraded.As with endangered species and their habitats in forests and deserts, the complexity of ecosystems is seen in rivers and the effects of development----beyond the obvious threats of industrial pollution, municipal waste, and in-stream diversions改道to slake消除the thirst of new communities in dry regions like the Southwes t…While there are many political hurdles障碍ahead, reauthorization of the Clean Water Act this year holds promise for US rivers. Rep. Norm Mineta of California, who chairs the House Committee overseeing the bill, calls it ―probably the most important env ironmental legislation this Congress will enact.‖ (553 words)6.According to the passage, the Clean Water Act______.A.has been ineffectiveB.will definitely be renewedC.has never been evaluatedD.was enacted some 30 years ago7.“Endangered” rivers are _________.A.catalogued annuallyB.less polluted than ―threatened rivers‖C.caused by floodingD.adjacent to large cities8.The “cataclysmic” event referred to in paragraph eight would be__________.A. fortuitous偶然的，意外的B. adventitious外加的，偶然的C. catastrophicD. precarious不稳定的，危险的9. The owners of the New World Mine appear to be______.A. ecologically aware of the impact of miningB. determined to construct a safe tailings pondC. indifferent to the concerns voiced by the EPAD. willing to relocate operations10. The passage conveys the impression that_______.A. Canadians are disinterested in natural resourcesB. private and public environmental groups aboundC. river banks are erodingD. the majority of US rivers are in poor conditionText CA classic series of experiments to determine the effects ofoverpopulation on communities of rats was reported in February of 1962 in an article in Scientific American. The experiments were conducted by a psychologist, John B. Calhoun and his associates. In each of these experiments, an equal number of male and female adult rats were placed in an enclosure and given an adequate supply of food, water, and other necessities. The rat populations were allowed to increase. Calhoun knew from experience approximately how many rats could live in the enclosures without experiencing stress due to overcrowding. He allowed the population to increase to approximately twice this number. Then he stabilized the population by removing offspring that were not dependent on their mothers. He and his associates then carefully observed and recorded behavior in these overpopulated communities. At the end of their experiments, Calhoun and his associates were able to conclude that overcrowding causes a breakdown in the normal social relationships among rats, a kind of social disease. The rats in the experiments did not follow the same patterns of behavior as rats would in a community without overcrowding.The females in the rat population were the most seriously affected by the high population density: They showed deviant异常的maternal behavior; they did not behave as mother rats normally do. In fact, many of the pups幼兽，幼崽, as rat babies are called, died as a result of poor maternal care. For example, mothers sometimes abandoned their pups,and, without their mothers' care, the pups died. Under normal conditions, a mother rat would not leave her pups alone to die. However, the experiments verified that in overpopulated communities, mother rats do not behave normally. Their behavior may be considered pathologically 病理上，病理学地diseased.The dominant males in the rat population were the least affected by overpopulation. Each of these strong males claimed an area of the enclosure as his own. Therefore, these individuals did not experience the overcrowding in the same way as the other rats did. The fact that the dominant males had adequate space in which to live may explain why they were not as seriously affected by overpopulation as the other rats. However, dominant males did behave pathologically at times. Their antisocial behavior consisted of attacks on weaker male,female, and immature rats. This deviant behavior showed that even though the dominant males had enough living space, they too were affected by the general overcrowding in the enclosure.Non-dominant males in the experimental rat communities also exhibited deviant social behavior. Some withdrew completely; they moved very little and ate and drank at times when the other rats were sleeping in order to avoid contact with them. Other non-dominant males were hyperactive; they were much more active than is normal, chasing other rats and fighting each other. This segment of the rat population, likeall the other parts, was affected by the overpopulation.The behavior of the non-dominant males and of the other components of the rat population has parallels in human behavior. People in densely populated areas exhibit deviant behavior similar to that of the rats in Calhoun's experiments. In large urban areas such as New York City, London, Mexican City, and Cairo, there are abandoned children. There are cruel, powerful individuals, both men and women. There are also people who withdraw and people who become hyperactive. The quantity of other forms of social pathology such as murder, rape, and robbery also frequently occur in densely populated human communities. Is the principal cause of these disorders overpopulation? Calhoun’s experiments suggest that it might be. In any case, social scientists and city planners have been influenced by the results of this series of experiments.11. Paragraph l is organized according to__________.A. reasonsB. descriptionC. examplesD. definition12．Calhoun stabilized the rat population_________.A. when it was double the number that could live in the enclosure without stressB. by removing young ratsC. at a constant number of adult rats in the enclosureD. all of the above are correct13.W hich of the following inferences CANNOT be made from theinformation inPara. 1?A. Calhoun's experiment is still considered important today.B. Overpopulation causes pathological behavior in rat populations.C. Stress does not occur in rat communities unless there is overcrowding.D. Calhoun had experimented with rats before.14. Which of the following behavior didn‟t happen in this experiment?A. All the male rats exhibited pathological behavior.B. Mother rats abandoned their pups.C. Female rats showed deviant maternal behavior.D. Mother rats left their rat babies alone.15. The main idea of the paragraph three is that __________.A. dominant males had adequate living spaceB. dominant males were not as seriously affected by overcrowding as the otherratsC. dominant males attacked weaker ratsD. the strongest males are always able to adapt to bad conditionsText DThe first mention of slavery in the statutes法令，法规of the English colonies of North America does not occur until after 1660—some forty years after the importation of the first Black people. Lest we think that existed in fact before it did in law, Oscar and Mary Handlin assure us, that the status of B lack people down to the 1660’s was that of servants. A critique批判of the Handlins’ interpretation of why legal slavery did not appear until the 1660’s suggests that assumptions about the relation between slavery and racial prejudice should be reexamined, and that explanation for the different treatment of Black slaves in North and South America should be expanded.The Handlins explain the appearance of legal slavery by arguing that, during the 1660’s, the position of white servants was improving relative to that of black servants. Thus, the Handlins contend, Black and White servants, heretofore treated alike, each attained a different status. There are, however, important objections to this argument. First, the Handlins cannot adequately demonstrate that t he White servant’s position was improving, during and after the 1660’s; several acts of the Maryland and Virginia legislatures indicate otherwise. Another flaw in the Handlins’ interpretation is their assumption that prior to the establishment of legal slavery there was no discrimination against Black people. It is true that before the 1660’s Black people were rarely called slaves. But this shouldnot overshadow evidence from the 1630’s on that points to racial discrimination without using the term slavery. Such discrimination sometimes stopped short of lifetime servitude or inherited status—the two attributes of true slavery—yet in other cases it included both. The Handlins’ argument excludes the real possibility that Black people in the English colonies were never treated as the equals of White people.The possibility has important ramifications后果，影响.If from the outset Black people were discriminated against, then legal slavery should be viewed as a reflection and an extension of racial prejudice rather than, as many historians including the Handlins have argued, the cause of prejudice. In addition, the existence of discrimination before the advent of legal slavery offers a further explanation for the harsher treatment of Black slaves in North than in South America. Freyre and Tannenbaum have rightly argued that the lack of certain traditions in North America—such as a Roman conception of slavery and a Roman Catholic emphasis on equality— explains why the treatment of Black slaves was more severe there than in the Spanish and Portuguese colonies of South America. But this cannot be the whole explanation since it is merely negative, based only on a lack of something. A more compelling令人信服的explanation is that the early and sometimes extreme racial discrimination in the English colonies helped determine the particular nature of the slavery that followed. (462 words)16. Which of the following is the most logical inference to be drawn from the passage about the effects of “several acts of the Maryland and Virginia legislatures” (Para.2) passed during and after the 1660‟s?A. The acts negatively affected the pre-1660’s position of Black as wellas of White servants.B. The acts had the effect of impairing rather than improving theposition of White servants relative to what it had been before the 1660’s.C. The acts had a different effect on the position of white servants thandid many of the acts passed during this time by the legislatures of other colonies.D. The acts, at the very least, caused the position of White servants toremain no better than it had been before the 1660’s.17. With which of the following statements regarding the status ofBlack people in the English colonies of North America before the 1660‟s would the author be LEAST likely to agree?A. Although black people were not legally considered to be slaves,they were often called slaves.B. Although subject to some discrimination, black people had a higherlegal status than they did after the 1660’s.C. Although sometimes subject to lifetime servitude, black peoplewere not legally considered to be slaves.D. Although often not treated the same as White people, black people,like many white people, possessed the legal status of servants.18. According to the passage, the Handlins have argued which of thefollowing about the relationship between racial prejudice and the institution of legal slavery in the English colonies of North America?A. Racial prejudice and the institution of slavery arose simultaneously.B. Racial prejudice most often the form of the imposition of inheritedstatus, one of the attributes of slavery.C. The source of racial prejudice was the institution of slavery.D. Because of the influence of the Roman Catholic Church, racialprejudice sometimes did not result in slavery.19. The passage suggests that the existence of a Roman conception ofslavery in Spanish and Portuguese colonies had the effect of _________.A. extending rather than causing racial prejudice in these coloniesB. hastening the legalization of slavery in these colonies.C. mitigating some of the conditions of slavery for black people in these coloniesD. delaying the introduction of slavery into the English colonies20. The author considers the explanation put forward by Freyre andTannenbaum for the treatment accorded B lack slaves in the English colonies of North America to be _____________.A. ambitious but misguidedB. valid有根据的but limitedC. popular but suspectD. anachronistic过时的，时代错误的and controversialUNIT 2Text AThe sea lay like an unbroken mirror all around the pine-girt, lonely shores of Orr’s Island. Tall, kingly spruce s wore their regal王室的crowns of cones high in air, sparkling with diamonds of clear exuded gum流出的树胶; vast old hemlocks铁杉of primeval原始的growth stood darkling in their forest shadows, their branches hung with long hoary moss久远的青苔;while feathery larches羽毛般的落叶松,turned to brilliant gold by autumn frosts, lighted up the darker shadows of the evergreens. It was one of those hazy朦胧的, calm, dissolving days of Indian summer, when everything is so quiet that the fainest kiss of the wave on the beach can be heard, and white clouds seem to faint into the blue of the sky, and soft swathing一长条bands of violet vapor make all earth look dreamy, and give to the sharp, clear-cut outlines of the northern landscape all those mysteries of light and shade which impart such tenderness to Italian scenery.The funeral was over,--- the tread鞋底的花纹/ 踏of many feet, bearing the heavy burden of two broken lives, had been to the lonely graveyard, and had come back again,--- each footstep lighter and more unconstrained不受拘束的as each one went his way from the great old tragedy of Death to the common cheerful of Life.The solemn black clock stood swaying with its eternal ―tick-tock, tick-tock,‖ in the kitchen of the brown house on Orr’s Island. There was there that sense of a stillness that can be felt,---such as settles down on a dwelling住处when any of its inmates have passed through its doors for the last time, to go whence they shall not return. The best room was shut up and darkened, with only so much light as could fall through a little heart-shaped hole in the window-shutter,---for except on solemn visits, or prayer-meetings or weddings, or funerals, that room formed no part of the daily family scenery.The kitchen was clean and ample, hearth灶台, and oven on one side, and rows of old-fashioned splint-bottomed chairs against the wall. A table scoured to snowy whiteness, and a little work-stand whereon lay the Bible, the Missionary Herald, and the Weekly Christian Mirror, before named, formed the principal furniture. One feature, however, must not be forgotten, ---a great sea-chest水手用的储物箱,which had been the companion of Zephaniah through all the countries of the earth. Old, and battered破旧的，磨损的, and unsightly难看的it looked, yet report said that there was good store within which men for the most part respect more than anything else; and, indeed it proved often when a deed of grace was to be done--- when a woman was suddenly made a widow in a coast gale大风，狂风, or a fishing-smack小渔船was run down in the fogs off the banks, leaving in some neighboring cottage a family of orphans,---in all such cases, the opening of this sea-chest was an event of good omen 预兆to the bereaved丧亲者;for Zephaniah had a large heart and a large hand, and was apt有…的倾向to take it out full of silver dollars when once it went in. So the ark of the covenant约柜could not have been looked on with more reverence崇敬than the neighbours usually showed to Captain Pennel’s sea-chest.1. The author describes Orr‟s Island in a(n)______way.A.emotionally appealing, imaginativeB.rational, logically preciseC.factually detailed, objectiveD.vague, uncertain2.According to the passage, the “best room”_____.A.has its many windows boarded upB.has had the furniture removedC.is used only on formal and ceremonious occasionsD.is the busiest room in the house3.From the description of the kitchen we can infer that thehouse belongs to people who_____.A.never have guestsB.like modern appliancesC.are probably religiousD.dislike housework4.The passage implies that_______.A.few people attended the funeralB.fishing is a secure vocationC.the island is densely populatedD.the house belonged to the deceased5.From the description of Zephaniah we can see thathe_________.A.was physically a very big manB.preferred the lonely life of a sailorC.always stayed at homeD.was frugal and saved a lotText BBasic to any understanding of Canada in the 20 years after the Second World War is the country' s impressive population growth. For every three Canadians in 1945, there were over five in 1966. In September 1966 Canada's population passed the 20 million mark. Most of this surging growth came from natural increase. The depression of the 1930s and the war had held back marriages, and the catching-up process began after 1945. The baby boom continued through the decade of the 1950s, producing a population increase of nearly fifteen percent in the five years from 1951 to 1956. This rate of increase had been exceeded only once before in Canada's history, in the decade before 1911 when the prairies were being settled. Undoubtedly, the good economic conditions of the 1950s supported a growth in the population, but the expansion also derived from a trend toward earlier marriages and an increase in the average size of families; In 1957 the Canadian birth rate stood at 28 per thousand, one of the highest in the world. After the peak year of 1957, thebirth rate in Canada began to decline. It continued falling until in 1966 it stood at the lowest level in 25 years. Partly this decline reflected the low level of births during the depression and the war, but it was also caused by changes in Canadian society. Young people were staying at school longer, more women were working; young married couples were buying automobiles or houses before starting families; rising living standards were cutting down the size of families. It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through theWestern world since the time of the Industrial Revolution. Although the growth in Canada’s population had slowed down by 1966 (the cent), another increase in the first half of the 1960s was only nine percent), another large population wave was coming over the horizon. It would be composed of the children of the children who were born during the period of the high birth rate prior to 1957.6. What does the passage mainly discuss?A. Educational changes in Canadian society.B. Canada during the Second World War.C. Population trends in postwar Canada.D. Standards of living in Canada.7. According to the passage, when did Canada's baby boom begin?A. In the decade after 1911.B. After 1945.C. During the depression of the 1930s.D. In 1966.8. The author suggests that in Canada during the 1950s____________.A. the urban population decreased rapidlyB. fewer people marriedC. economic conditions were poorD. the birth rate was very high9. When was the birth rate in Canada at its lowest postwar level?A. 1966.B. 1957.C. 1956.D. 1951.10. The author mentions all of the following as causes of declines inpopulation growth after 1957 EXCEPT_________________.A. people being better educatedB. people getting married earlierC. better standards of livingD. couples buying houses11.I t can be inferred from the passage that before the IndustrialRevolution_______________.A. families were largerB. population statistics were unreliableC. the population grew steadilyD. economic conditions were badText CI was just a boy when my father brought me to Harlem for the first time, almost 50 years ago. We stayed at the hotel Theresa, a grand brick structure at 125th Street and Seventh avenue. Once, in the hotel restaurant, my father pointed out Joe Louis. He even got Mr. Brown, the hotel manager, to introduce me to him, a bit punchy强力的but still champ焦急as fast as I was concerned.Much has changed since then. Business and real estate are booming. Some say a new renaissance is under way. Others decry责难what they see as outside forces running roughshod肆意践踏over the old Harlem. New York meant Harlem to me, and as a young man I visited it whenever I could. But many of my old haunts are gone. The Theresa shut down in 1966. National chains that once ignored Harlem now anticipate yuppie money and want pieces of this prime Manhattan real estate. So here I am on a hot August afternoon, sitting in a Starbucks that two years ago opened a block away from the Theresa, snatching抓取，攫取at memories between sips of high-priced coffee. I am about to open up a piece of the old Harlem---the New York Amsterdam News---when a tourist。
基于深度学习的声学场景分类与声音事件检测
摘要声学场景分类(Acoustic Scenes Classification,ASC)和声音事件检测(Sound Event Detection,SED)是多媒体分析与检索、音频监控、智能辅助驾驶等应用领域的关键技术，也是目前音频信号处理领域的研究热点之一。
本文以复杂音频作为分析对象，探讨基于深度学习的声学场景分类和声音事件检测方法。
本文主要工作及创新点如下：（1）提出了基于音频特征增强的声学场景分类方法。
本文主要探讨音频特征增强(Audio Feature Augmentation,AFA)对声学场景分类性能的影响。
具体包括：对两个通道音频数据的特征进行求均值和求差运算，得到两个通道特征的相同点和差异点；对音频数据均值的频谱做谐波冲击源分离(Harmonic Percussive Source Separation,HPSS)，得到增强的音频特征。
采用实验数据库DCASE2016和DCASE2017进行评测，基于音频特征增强的声学场景分类方法获得的准确率分别为85.8%和69.9%，均优于没有做数据增强的方法。
此外，与其它声学场景分类方法相比，本文方法性能更优。
（2）提出基于深度特征融合的道路异常声音事件检测方法。
首先，采用深度自编码网络(Deep Autoencoder Network,DAN)将梅尔频率倒谱系数(Mel Frequency Cepstral Coefficient,MFCC)，Bark滤波器组(Bark Filter Bank,BFB)和Gabor滤波器组(Gabor Filter Bank,GFB)三种浅层特征变换为深度特征，然后将上述深度特征的组合再次采用深度自编码网络进行变换得到融合的深度特征，最后将融合的深度特征输入长短时记忆网络(Long Short Term Memory Network,LSTMN)进行判决。
实验结果表明，融合的深度特征在没有添加噪声时所得到的异常声音事件检测准确率为92.15%，F值为91.32%，高于其他单一特征所得到的结果；在添加噪声后，当信噪比分别为20dB、10dB、0dB、-10 dB时，融合的深度特征的性能明显优于其他特征，具有较强的抗噪性。
外文文献翻译——顾客满意度(附原文)
外文文献翻译（附原文）译文一：韩国网上购物者满意度的决定因素摘要这篇文章的目的是确定可能导致韩国各地网上商场顾客满意的因素。
假设客户的积极认知互联网购物的有用性，安全，技术能力，客户支持和商场接口积极影响客户满意度。
这也是推测，满意的顾客成为忠实的客户。
调查结果证实，客户满意度对顾客的忠诚度有显著影响，这表明，当顾客满意服务时会显示出很高的忠诚度。
我们还发现，“网上客户有关安全风险的感知交易中，客户支持，网上购物和商场接口与客户满意度呈正相关。
概念模型网上购物者可以很容易的将一个商场内的商品通过价格或质量进行排序，并且可以在不同的商场之间比较相同的产品。
网上购物也可以节省时间和降低信息搜索成本。
因此，客户可能有一种感知，他们可以用更少的时间和精力得到更好的网上交易。
这个创新的系统特性已被定义为知觉有用性。
若干实证研究发现，客户感知的实用性在采用影响满意度的创新技术后得以实现。
因此，假设网上购物的知觉有用性与满意度成正相关（H1）。
网上客户首要关注的是涉及关于网上信用卡使用的明显的不安全感。
虽然认证系统有明显进步，但是顾客担心在网上传输信用卡号码这些敏感的信息是不会被轻易的解决的。
网上的隐私保护环境是另一个值得关注的问题。
研究表明，网上客户担心通过这些网上业务会造成身份盗窃或冒用他们的私人信息。
因此，据推测，网上购物的安全性对顾客满意度有积极地影响（H2）。
以往的研究表明，系统方面的技术，如网络速度，错误恢复能力和系统稳定性都是导致客户满意度的重要因素。
例如，Kim和Lim（2001）发现，网络速度与网上购物者的满意度有关。
Dellaert和卡恩（1999年）也报告说，当网络提供商没有进行很好的管理时网上冲浪速度慢会给评价网站内容带来负面影响。
丹尼尔和Aladwani的文件表明，系统错误的迅速准确的恢复能力以及网络速度是影响网上银行用户满意度的重要因素（H3）。
由于网上交易的非个人化性质客户查询产品和其他服务的迅速反应对客户满意度来说很重要。
机器翻译实例分析 ppt课件
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从简介中易发现自动从大量语料中学习并自动生成翻译结果，即翻译结 果是没有经过任何人工整理与编辑的；而Google 翻译通过在经过人工翻译的文档 中检测各种模式，进行合理的猜测，然后得出适当的翻译，针对某种特定语言可分 析的人工翻译文档越多于被动形式从句，谷 歌译will produc，那么 两个单词词典给出的涵义为：
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可见谷歌的翻译此处使倾向于‘惊艳’的理解，而当 我们单独用谷歌查询‘对翻译意思的理解。
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3.砖工艺的石钟乳体是伊斯兰风格最具特色的手法。彩色玻璃马赛克镶嵌，可 用于玄关或家中的隔断上。 B：Stalactite brick process is the way the Islamic style is the most characteristic.Color glass mosaic, can be used for the entrance or a partition. G：Brick craft stalactite body is the most unique Islamic style tactics. Stained glass mosaic can be used for entrance or home partition on.
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基于摩擦纳米发电机的柔性可穿戴多功能压力传感器
摘要随着社会的日益进步，医疗水平不断提高，互联网技术快速发展，健康和信息安全成为人们最为关注的焦点。
目前医疗资源的短缺和屡见不鲜的个人信息泄露事件，越来越成为人们的心头之患。
在健康方面，社会老龄化进一步加剧，各类慢性疾病的数量逐年增长，人们越来越意识到医院治疗已不能满足自身健康的需求，日常生活中更需要仪器设备实现自身健康状态长期持续的监测。
在信息安全方面，虽然人们采用密码、U盾及密保等方式保护个人信息，但个人信息依旧被窃取，泄漏在互联网等媒介之上。
如果日常生活中对人们的健康状态进行持续监测，并使用一种独一无二的身份识别方式，将大大减少各类慢性疾病的数量及个人信息泄露的问题。
目前部分可穿戴设备可用于人体生理信号的测量，实现对人体健康状态的检测。
每个人的生物特征是独一无二的，将生物特征用于身份识别，信息将很难被窃取。
但是目前存在的可穿戴设备无法实现健康状态监测和身份识别双重功能。
为此，本文做了以下研究：①本文研究了基于摩擦纳米发电机的柔性可穿戴多功能压力传感器。
该传感器以人耳鼓膜结构进行仿生，结合单电极式摩擦纳米发电机工作模式，采用PTFE 薄膜、Nylon薄膜、ITO薄膜以及PET衬底制作而成。
结合薄膜的振动特性从理论上分析了传感器的振动模态，采用单电极摩擦纳米发电机的工作原理分析传感器的电学输出特性，采用COMSOL Multiphysics对传感器的振动特性和开路电压进行了仿真，验证了设计的传感器具有较宽的工作频带范围，高低频特性较好。
②对传感器测得信号中的噪声进行了分析及处理。
对传感器输出信号中的工频干扰、肌电漂移、运动伪迹和基线漂移噪声进行处理。
采用模拟滤波和数字滤波相结合的方式，对传感器输出信号进行处理。
结合传感器输出信号频谱中信号频率分布，采用10Hz Butterworth低通滤波器和45Hz~1500Hz Butterworth带通滤波器对测量的信号进行了分解，分别得到脉搏波信号和喉咙声信号。