Model-Test-1知识讲解
新向标英语model test 1四级 -回复
尊敬的各位专家和同仁们,我想感谢您们能够抽出宝贵的时间来阅读并回复本文。
今天我将在此发表一篇新向标英语四级模拟试题,希望可以得到各位的批评和指导。
1. 阅读文章Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A), B), C) and D). For questions 8-10,plete the sentences with the information given in the passage.Questions 1-10The Internet and globalization have changed the way people interact and develop their relationships. In the past, people often relied on face-to-facemunication to foster relationships with others. However, in today’s society, many people have turned to the Internet to meet new friends,municate with others and m本人nt本人n their relationships.In a study conducted by the Pew Research Center, it was found that 35 of adults have used social media to meet new friendsand 57 have used it to make new business contacts. This change in the way people develop relationships has had both positive and negative effects.One positive effect of the Internet and globalization on relationships is that it has allowed people to connect with others from all over the world. It is now possible for people to form friendships and business connections with individuals from different countries and cultures. This has not only broadened people’s social circles, but also increased their awareness and understanding of the world.On the other hand, the Internet and globalization have also had some negative effects on relationships. For example, some people have be so engrossed in their online relationships that they have neglected their offline relationships. Additionally, the Internet has made it easier for people to engage in dishonest behavior, such as lying about their identity and intentions.In conclusion, the Internet and globalization have brought about significant changes in the way people develop their relationships. While it has made it easier for people to connect with others from around the world, it has also brought aboutsome negative consequences.2. 听力部分Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 11-15, mark A) if the statement is true, mark B) if the statement is false, and mark C) if the statement has no information.Questions 11-1511. The Internet has changed the way people interact and develop their relationships.12. According to the study conducted by the Pew Research Center, 57 of adults have used social media to meet new friends.13. One positive effect of the Internet and globalization is that it has allowed people to form friendships with individuals from different countries.14. The Internet has made it easier for people to engage in dishonest behavior, such as lying about their identity and intentions.15. The Internet has not brought about any negative consequences in the way people develop relationships.3. 翻译部分Directions: For this part, you are allowed 30 minutes to translate a passage from Chinese into English. You should write your answer on Answer Sheet 2.Part A请按照以下要求,将第1到第5段译成英语。
高中英语 知识点大全54 exam exmination test quiz的区别
高中英语知识点大全(54):exam / exmination / test / quiz的区别1、exam / exmination / test / quizexamination通常只指正式的“考试”,如期末考试、入学考试等。
exam 是examination的缩写,常用于口语,多为学生使用。
test为“小考”成“考查”;quiz 为“测验”,特指事先无准备,随时进行的测验,也可指(广播节目中的)一般知识测验、问答比赛、猜谜等。
例如:He did very well in the entrance examination. 他在入学考试中成绩很好。
There’s going to be a physics test this afternoon.今天下午将进行物理考试。
The teacher gave us a five-minute quiz.老师对我们进行了一次五分钟的小测验。
2、example / pattern / modelpattern “型、式样、图样”可指供模仿的某物原型或精心设计出的图样或模型,也可指榜样。
如:Can you use the sentence pattern?他会用这个句型吗?She is a pattern for us.她是我们学习的典范。
model “模型、模范”,指供模仿或值得信效的人或物。
如:Have you seen his model ship?你看见过他的船模吗?example“例子、榜样”,主要指人及其行为和活动被他人信效。
如:Example is better than precept.身教重于言教。
3、expect/ wait二者均有“等待”之意,但有不同。
expect侧重心理状态,因而可译为“期待,期盼”,是及物动词;而wait指行动,有“不干别的事专门等”之意,是不及物动词。
对比:They are busy with prepartions, expecting the foreign guests.他们忙着准准备,期待着外宾的到来。
OOAD总结
第一章1、什么是分析与设计?1、分析强调对问题和需求的调查研究2、设计强调的是满足需求的概念上的解决方案2、什么是面向对象分析与设计?1、在面向对象分析过程中,强调的是在问题领域内发现和描述对象(或概念)2、在面对对象设计过程中,强调的是定义软件对象以及它们如何协作以实现需求。
3、简单示例:1、定义用例(use case)需求分析可能包括人们如何使用应用的情节或场景,这些情节或场景可以被编写成用例。
2、定义领域模型(domain model)面向对象分析的结果可以表示为领域模型,在领域模型中展示重要的领域概念或对象。
需要注意的是,领域模型并不是对软件对象的描述,它使真实世界领域中的概念和想象可视化。
(也被称为概念领域模型—conceptual object model)3、定义交互图关注的是软件对象的定义—它们的职责和协作。
顺序图(sequence diagram)是描述协作的常见方法。
它展示对象之间的信息流,和由消息引起的方法调用。
4、定义设计类图除了在交互图中显示对象协作的动态视图外,还可以用设计类图(design class diagram)来有效的表示类定义的静态视图。
这样可以描述类的属性和方法。
与领域模型表示的是真实世界的类,设计类图表示的是软件类要注意的是,尽管设计类图不同于领域模型,但是其中的某些类名和内容还是相似的。
第二章1、什么是UML?统一建模语言(UML)是描述、构造和文档化系统制品的可视化语言。
UML表示法的基础是UML元模型,它描述建模元素的语义,UML元模型对模型驱动架构(Model Driven Architecture, MDA)CASE工具供应商具有影响。
开发者并不需要对其进行学习。
2、三种UML应用方式1、UML作为草图—非正式的、不完整的图,借助可视化语言的功能,用于探讨问题或解决方案空间的负责部分。
2、UML作为蓝图—相对详细的设计图。
用于:①逆向工程;②代码生成。
Keys to Model test 1-20
Key to Model test 11. We all took it for granted that he would take part in the party, but he didn’t turn up till the end.2.Unfortunately, no one in the class can work out the difficult problem. It is a pity that no one in the class can work out the difficult problem3.Even a student of average intelligence can become a top student by working hard.4.You should/are supposed to give up some of your hobbies so that you can spend more time on your study.5.Have you caught a cold or something? You should have gone to the doctor earlier.Key to Model test 21.He took over the business from his father when he was 25, and it turned out that he was more successful than his father.2.It is well known that our problems are caused at least in part by failure to communicatewith each other.3.John declared that he would not get married until he found a satisfactory job.4.The police set out to look into the traffic accident and tried to find out who should be responsible for it.5.It was proposed that the meeting be put off till next week.Key to Model test 31.Once you have made a promise, you should stick to it, however difficult it may be.2.In spite of all the difficulties, we are determined to carry out the project as planned.3.Scientists should come up with new methods of increasing the world’s food supply so as to meet the needs of the ever-increasing population.4.Due to the injure on the left leg, John could barely walk without help.5.Young people under 18 are prohibited fromdrinking alcohol in some western countries.Key to Model test 41.What do you think s scientist must do in order to catch up with the latest development in his field?2.The second half of the game was by far more exciting than the first half.3.Judging from the response of the audience, his speech was quite a success.puters produced/turned out in this company are superior in quality to those in other companies.5.But for their generous help, I could not have completed the task within such a short time.Key to Model test 51.Faced with such a rival/an opponent, he stands little chance of winning/chances that he will win are rather slim.2.The majority of teachers objected to the proposal of selecting course online.3.As long as you can concentrate on your work, you are sure to succeed.4.He had some difficulty in adjusting himself to the new situation.5.The child was the only one that survived the air crash.Key to Model test 61.Contrary to our expectation, he chose to work instead of applying to that famous university.2.My uncle is fond of music, classic music in particular.3.They set up a school in honor of those who died in the war.4.The town looks totally different from what it was ten years ago.5.On hearing the news that she fired, she burst into tears.Key to Model test 71. I admit I should feel ashamed of what hashappened.2.He traveled day and night so that he couldget home as soon as possible.3.He would rather be punished than tell lies tothe teacher.4.He tricked the girl into marrying him bypretending that he was the son of a millionaire.5.Due to the financial and mental pressure,Peter finally broke down in health.Key to Model test 81.The small village was isolated from the outside world by the heavy snow.2.As far as color is concerned, I prefer the blue coat.3.In a way, I agree with your estimate of the situation.4.The pointed roof is typical of the houses in South China.5.Librated from the housework, many housewives have found a satisfactory joboutside home.Key to Model test91. I don’t see what’s the point of your doing so.2. These two articles are similar to each other in both content and style.3.The government (was) determined to take effective steps to beautify the city.4.If only you had informed me of his coming earlier!5.Now that you have chosen to live in the city, you should live with/put put with/endure/stand the hot weather here.Key to Model test 101.Neither my husband nor I know how to handle such a complicated problem.2.He was proud of the contribution his son had made to the country.3.He brushed aside/paid little attention to all our objections and insisted that the policy beput into practice.4.The police were determined to arrest the criminal wherever he might hide.5.Being short of experience, he always fell behind the others at the beginning.Key to Model test 111.Whether or not we may not go to the picnic depends, to a large extent, on the weather.2.You’d better book the room in advance lest on rooms be available when you arrive.3.The production in our factory this year is five times more than that if last year.4.No sooner had he arrived at the station than the train began to move.5.Undoubtedly he has no intention of going abroad, because he has made up his mind to devote himself to the educational cause of his motherland.Key to Model Test 121.Given enough financial and manpowersupport, we would be able to complete the task successfully.2.It is believed by some people that the more money one has, the happier he will be. But this is not always the case.3.It was his firm faith in victory that brought him through the disaster.4.At first he tried to deny his involvement in this robbery, but he confessed to the police in the end.5.He acted on the door’s suggestion and stopped smoking.Key to Model test 131.Consumers are always misled by advertisements and buy something more than necessary.2.Allen is a boy of few words, but when it comes to sports, he becomes very talkative.3.The atmosphere is composed of certain gases mixed together in definite proportions.4.By mistake the storekeeper gave a 50-yuannote instead of a 10-yuan note.5.Einstein is the only person I know who could come to terms with the world around him.Key to Model test 141.He promised he would live up to what his parents expected of him.2.A committed teacher is supposed to devote himself to his work.3.He is selfish. His unwillingness to help his friends is a good case in point.4.His silence made him somewhat out of place at such a happy party.5.In many big cities, cars have taken the place of/replaced bikes and become the major means of transportation.Key to Model test 151.It took my father about one year to get used to living in a large city.2.To our surprise, he was accused of/was charged with murder by the police.3.The way he talks often reminds me of his grandfather.4.Students regard her not only as a good teacher but as a good friend as well.5.The United Nation urges the government in different countries to settle problems in a peaceful way.Key to Model test 161.Mr. Johnson said he would like to talk it over with his wife before he could give me a reply.2.This school attaches much importance to the role outdoor activities play in the education of children.3.See to it that all the lights are turned off before you leave the classroom.4.On seeing his funny face we couldn’t help laughing.5.Obviously, I had little in common with him on this topic.Key to Model test 171.The two companies have come to an agreement after a long-time negotiation.2.Mum took advantage of the good weather and gave the house a thorough clean.3.Whatever you do, you must keep in mind the interests of the state.4.What really counts is not how many books you have read but what you have read.5.Many children in the mountainous areas have been deprived of the right of being educated because of poverty.Key to Model test 181.Several hours had passed before he convinced/persuaded the judge of his innocence.2.With the whole family living on his small income, he could not afford to send his daughter to the university.3.Sally cannot wait to tell her parents the news that he had been admitted to Peking University.4.When he was young, he showed interest in science and longed to become a scientist in the future.5.I believe that a happy marriage mainly lies in the mutual respect and loyalty between husband and wife.Key to Model test 191.Yesterday I ran across an old friend with whom I have lost contact for years in the bookstore.2.Considering he has only been learning English for one year, he does speak it very well.3.The professor never refers to any material while giving a lecture.4.He attributed/owed his success to his parents’support and his own diligence/hardwork.5.Don’t expect too much of him; he is a child after all.Key to Model test 201.As long as you return the book to me in three days, I can lend it to you.2.Your neglecting your duty resulted in/led to/brought about a serious consequence.3.Their miserable life constitutes a sharp contrast to that of the rich.4.I was on the point of giving up when a good idea occurred to me.5.Her father will never approve of her marriage to you.。
VECM案例分析知识讲解
VECM案例分析1 VECM模型的具体构建步骤VECM模型的具体运用主要包括以下几个步骤:1、序列的单位根检验与VAR模型不同,VECM模型是针对非平稳序列而言的。
因此在进行协整检验和运用VECM前需进行单位根检验。
2、协整检验协整检验关键是协整形式和滞后阶数的选择。
3、VECM模型的估计若存在协整关系,就可以建立相对应的VECM模型.进行估计了。
4、VECM模型的残差检验残差检验与VAR模型类似,包括残差的独立性检验。
5、VECM模型的应用VECM模型的应用与VAR模型类以包括预测、脉冲响应与方差分解。
VECM模型的应用举例4.4.1案例分析的背景中国人民银行长期以来坚持以CPI作为货币政策导向,并没有考虑资产价格这一目标。
但是随着中国经济市场化程度的不断深化,以股票市场为核心的资本市场的作用日益凸显。
货币政策是否对股票市场产生影响,以及股票市场是否在货币政策传导中充当了作用已成为学术界关注的焦点问题。
本例将对物价水平、货币政策、股票市场的相互关系进行分析。
4.4.2实验数据本实验选取了CPI、广义货币供应量(m)、Shiboi .上证A股指数(index)1996年12月至2010年11月月度数据进行分析。
4.4.3 VECM模型的构建1、数据处理由于CPI和上证A股指数都是相对数,为了减少基期的影响以及减少异方差性.对CPI和上证A股指数取对数。
观察广义货币供应量的图形,以及货币政策的特点,分析广义货币供应量(M)的可能季节性特征,这里采用X12进行分析。
在M 的窗口点击proc/seasonal adjustment/census X12...,分析结果如下:Sum of Squares Dgrs ・ ofFreedomMeanSquare F-ValueBetween months61.603911 5.6003513.023** Residual67.08721560.43005Total128.6910167**Seasonality present at the O.l per cent level・从而M存在季节性。
Model Test 1-6参考答案
Model Test 1参考答案Part ⅡReading Comprehension (Skimming and Scanning)1. D2. A3. C4. D5. D6. C7. C8. Richard I, Henry VIII and Queen Victoria9. there are few renowned British composers10. from a weekend to three or four weeksPart Ⅲ Listening Comprehension11.C12. A13.B 14.A15.D16.D17.C 18.B 19. A20. C21. B 22. D23. B24. A25. A26. C27. A28. A 29. B30. B31. C32. D 33. C34. B35. B36. situation37. opinions38. trial 39. methods 40. stages41. recognize42. broken43. define44. he must determine if the problem is with the gears, the brakes, or the frame45. Now the person must look for information that will make the problem clearer and lead to possible solutions46. After studying the problem, he should have several suggestions for a possible solutionPart IV Reading Comprehension47. C 48. D 49. B 50. C 51. A 52. B 53. D 54. B 55. B 56. D57. A 58. D 59. C 60. B 61. APart V Cloze62. 答案D 解析:上文提及上流社会,分为“上流中的上层,上流中的下层”,接着讲到上流中的上层包括哪些人。
Model-Test-1-答案
Model Test 1Section ADirections: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.注意:此部分试题请在答题卡 2上作答。
11 A) Catch a cold.B) Hurry to catch the bus.C) Sit next to the bus stop.D) Fix his torn sleeve.12A) Lily no longer lives in Boston.B) Lily doesn’t know how to economize.C) The woman called Lily in New York.D) The woman didn’t ever meet Lily.13A) Go to London.B) Spend the weekend at home.C) Go to Berlin.D) Visit her cousin.14A) To sell it to others.B) To make others interested in it.C) To throw it away.D) To ask Bill and Betty whether they want to have it.15A) The shopping list.B) Changing the curtains.C) What they need.D) Their economical condition.16A) Big parties are more impersonal than small ones.B) She prefers small parties.C) She likes big parties better.D) The party is too noisy.17A) Ann is serious about Bob.B) Bob is serious about Ann.C) Ann is not serious about Bob.D) Bob is not serious about Sally.18A) $20. B) $15. C) $24. D) $21.Questions 19 to 22 are based on the conversation you have just heard.19. A) It’s too noisy.B) It’s not convenient to the university.C) The heating system is defective.D) The owner is unpleasant.20. A) Tell the owner two months in advance that she is moving.B) Alerting the housing authorities to her problem.C) Move to another apartment in the same building.D) Leave the end of the month.21. A) Rent would be very expensive.B) Public transportation wouldn’t be available.C) Apartment complexes in Winsor are old.D) Apartments in Winsor tend to be noisy.22. A) There is nothing special.B) They are new and functional.C) The walls are thin and you can hear everything from the next door.D) It is very noisy around.Questions 23 to 25 are based on the conversation you have just heard.23. A) At Beijing City Tour Information Services.B) In Australia.C) At Beijing Hotel.D) In the Forbidden City.24. A) Tiananmen Square and the Palace Museum.B) The Summer Palace and the Yuanmin Garden.C) The Forbidden City and Chang’an Street.D) The Suburbs of Beijing.25. A) He can take No. 101 bus from the hotel.B) He can take a subway train.C) He can take the shuttle bus directly to the Summer Palace.D) All above are correct.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.注意:此部分试题请在答题卡2作答。
2、model的rules验证规则
2、model的rules验证规则model的rules验证规则是指在使用模型进行数据验证时所遵循的规则。
在开发过程中,数据验证是非常重要的一环,它可以确保输入的数据符合预期的格式和规范,提高系统的稳定性和安全性。
本文将介绍一些常见的model的rules验证规则,并详细解释其作用和使用方法。
1. 必填规则(required rule)必填规则是最基本的验证规则,它要求指定的字段不能为空。
当用户未填写必填字段时,系统会自动提示用户进行填写。
在使用框架自带的验证器时,可以通过在验证器规则中加入'required'来实现必填规则的验证。
2. 数据类型规则(data type rule)数据类型规则用于验证输入数据的类型是否正确。
例如,当我们需要验证一个字段是否为整数类型时,可以使用'int'规则来进行验证。
系统会自动检查输入的数据是否为整数类型,如果不是,则会给出相应的错误提示。
3. 字符长度规则(string length rule)字符长度规则用于限制输入字段的字符长度。
例如,我们可以使用'min:2|max:10'规则来验证某个字段的字符长度必须在2到10之间。
当用户输入的字符长度不符合要求时,系统会给出相应的错误提示。
4. 唯一性规则(unique rule)唯一性规则用于验证某个字段的值在数据库中是否唯一。
例如,我们可以使用'unique:users,email'规则来验证用户的邮箱是否已经存在于数据库中。
如果存在相同的邮箱,则系统会提示用户进行修改。
5. 正则表达式规则(regular expression rule)正则表达式规则用于验证输入数据是否符合指定的正则表达式格式。
例如,我们可以使用'regex:/^[a-zA-Z0-9]+$/'规则来验证某个字段是否只包含字母和数字。
如果输入的数据不符合正则表达式的格式要求,则系统会给出错误提示。
模型检测modelchecking学习
模型检测modelchecking学习一、基本概念模型检测(model checking)是一种很重要的自动验证技术。
它最早由Clarke和Emerson以及Quielle和Sifakis在1981年分别提出的,主要通过显式状态搜索或隐式不动点计算来验证有穷状态并发系统的模态/命题性质。
由于模型检测可以自动执行,并能在系统不满足性质时提供反例路径,因此在工业界比演绎证明更受推崇。
尽管限制在有穷系统上是一个缺点,但模型检查可以应用于许多非常重要的系统,如硬件控制器和通信协议都是有穷状态系统。
很多情况下,可以把模型检测和各种抽象与归纳原则结合起来验证非有穷状态系统(如实时系统)。
模型检测的基本思想是用状态迁移系统(S)表示系统的行为,用模态逻辑公式(F)描述系统的性质。
这样“系统是否具有所期望的性质”就转化为数学问题“状态迁移系统S是否是公式F的一个模型?”,用公式表示为S╞F。
对有穷状态系统,这个问题是可判定的,即可以用计算机程序在有限时间内自动确定。
模型检测已被应用于计算机硬件、通信协议、控制系统、安全认证协议等方面的分析与验证中,取得了令人瞩目的成功,并从学术界辐射到了产业界。
模型检测应用过程中,需要考虑增加效率和减少内存空间需求,此外,需要研究减少模型本身或验证性质的复杂性,主要方法有不同类型的抽象、程序切片、模型分解、验证性质的分解等。
1)抽象的基本方法是抽掉系统中的细节、用尽可能少的状态来刻画系统的动作过程。
2)程序切片的基本十法界将程序中不影响所要验证的性质的语句去年以减少模型的复杂性。
2)模型分解的方法是将一个模型分解成若干部分,或者分别验证,或者提供一个较好的组合方法以降低验证的复杂性。
同样,一个需要验证的性质也有可能分解成若干部分,然后分别验证。
二、模型检测的自动化工具1)SMV-美国CMU大学开发,用于检测一个有限状态系统是否满足CTL(computing tree logic,计算树逻辑)公式,以模块为单位,模块可以同步或异步组合。
Model test 1-参考答案
Model test 1
得分
评卷人
一、词汇题
1-5 bbbcb
6-10 bcddb
11-15 cdabc
16-20 abcdc
二、判断题
21-25. FFFFF26-30. FFFTT
三、完型填空题
31. I32. O33. J34. C35. L
36. N37. E38. F39. D40. K
四、阅读理解题
46-50.ABDCB51-55.BDDAA56-60.BCBCC61-65.ACBAB
5、阅读评论题
评分标准
分数
标准
18-20分
文章切题,内容充实,有独到之处;行文流畅,语言得体;篇幅适当;结构严谨;句子结构有变化,用词有变化.避免了单调和粗俗;无语法错误.
16-17分
基本切题;语体基本得当;篇幅适当;篇章结构进行了适当的计划或调整;只有少量语法错误;或拼ቤተ መጻሕፍቲ ባይዱ错误,不致阅读困难.
13-15分
基本切题,但内容有待充实;语体不当之处较少;篇幅适当;结构有待改善;常用结构中无语法错误,其他语法和词汇错误不致引起严重的阅读困难.
7-12分
大致切题,但有关内容欠缺或包含无关内容;缺乏语体意识;篇幅不够;篇章结构松散不当;各种语言错误导致严重阅读困难或误解.
0-6分
错误过多,无法阅读.
新能源汽车实训实验方案
目录第1章系统介绍及示意图 (1)1.1平台概述 (1)1.2产品外观 (1)1.3系统示意图 (2)1.4功能特点: (2)第2章教学实验与实训 (3)2.1实验项目概要 (3)第3章MotorTest软件介绍 (4)3.1配置操作说明 (4)3.1.2电机信息配置操作 (5)3.1.3PA数据采集配置操作 (5)3.2测试操作说明 (6)3.2.1自动测试操作说明 (6)3.2.2手动测试操作说明 (7)3.2.3耐久测试操作说明 (8)3.2.4Pid测试操作说明 (8)3.3数据查看操作说明 (9)3.4报表导出操作说明 (10)3.5路况模拟操作界面说明 (11)第1章系统介绍及示意图1.1 平台概述随着汽车工业的高速发展,能源短缺和环境污染问题也日益严重,新能源汽车由于能够实现超低排放甚至零排放的要求,得到了各个国家政府和企业的高度重视,并被视为调整交通能源使用结构和改善城市大气环境质量的有效途径之一。
而电动汽车作为新能源汽车的代表,由于其技术相对简单,只要有电力供应的地方都能够充电,从而受到广大汽车厂商和用户的广泛关注。
电力驱动及控制系统是电动汽车的核心,主要包括了:驱动电机,驱动器、动力电池。
动力电池、驱动电机及控制器的性能对整个电动汽车的性能起到至关重要的作用,如下图所示:图1.1新能源汽车的基本结构本新能源汽车教学平台系统采用了与实际电动汽车电力驱动及控制系统类似的组成部分,能够直观、真实地模拟电动汽车的实际组成结构和运行工况,并能够对整个系统进行测试分析,能够满足在新能源汽车领域教学和科研中的需求。
1.2 产品外观图1.2新能源汽车教学平台注:以上外观图为产品预计外观,交货产品会依据实际情况稍有改动,最终以实物为准。
1.3 系统示意图图1.3新能源汽车教学平台系统示意图1.4 功能特点:●完整的驱动模拟系统:包括驱动电机,电机驱动器以及负载,集成了高性能的扭矩和转速传感器;●基于CAN-bus的驱动控制系统,能够完成对驱动系统的控制和监测;●基于CANopen网络的驱动控制系统●可以集成基于CAN-bus总线的BMS系统;●集成高性能的电机与驱动器分析仪,可以对整个驱动系统的评估测试,满足新能源汽车教学平台在驱动系统教学和科研中的需要;1)驱动系统效率测试2)变频系统性能测试3)动力系统性能测试4)驱动运行工况测试●CAN总线通讯分析:平台集成了国际领先的CAN总线分析单元,可对电动汽车核心通讯网络CAN-BUS从协议层到应用层等多层次、全方位的测试分析;●提供有丰富的教学和开发资料,便于教学和科研应用。
专四真题华研外语Model test 1讲解
Everyone has done their best in the game, haven’t they?
3.陈述部分为There + be +主语时,问句部分用 动词+ there?形式。
There are two cakes on the plate,
bridge between life and death
• Still, others see the rainbow as a sign of good things to come.
Dictation The first step : Memorizing the main idea.(The first reading)
AC表示能力, D表示允许
3. My brother met her at the Grand Theater yesterday afternoon, so she ______your lecture.
A. mustn’t have attend B. needn’t have attend. C. shouldn’t have attend. D. couldn’t have attend.
sun
• Rainbow hold a an important place in the traditional stories and beliefs
• that make up many cultures • For example, some culture say the rainbow represents a
1. 陈述部分的主语为不定代词something, anything, nothing, everything时,问句部分的主语用it。
大学英语四级试卷-大学英语四级考试全真预测试卷一Model Test One
大学英语四级考试全真预测试卷一Model Test OnePart I Writing (30 minutes)Directions: For this part, you are allowed 30 minutes to write a composition one topic: City Problems. You should write at least 120 words following the outline given below in Chinese:1. 越来越多的人涌入大城市,有些问题随之产生2. 比较明显的大问题有……3. 我对这种现象的想法City ProblemsPart II Reading Comprehension (Skimming and Scanning) (15 minutes)Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1.For questions 1-7, markY (for YES) if the statement agrees with the information given in the passage;N (for NO) if the statement contradicts the information given in the passage;NG (for NOT GIVEN) if the information is not given in the passage.For questions 8-10, complete the sentences with the information given in the passage.Scientists Weigh Options for Rebuilding New OrleansAs experts ponder how best to rebuild the devastated (毁坏)city, one question is whether to wall off—or work with—the water.Even before the death toll from Hurricane Katrina is tallied, scientists are cautiously beginning to discuss the future of New Orleans. Few seem to doubt that this vital heart of U.S. commerce and culture will be restored, but exactly how to rebuild the city and its defenses to avoid a repeat catastrophe is an open question. Plans for improving its levees and restoring the barrier of wetlands around New Orleans have been on the table since 1998, but federal dollars needed to implement them never arrived. After the tragedy, that's bound to change, says John Day, an ecologist at Louisiana State University (LSU) in Baton Rouge. And if there is an upside to the disaster, he says, it's that 'now we've got a clean slate to start from."Many are looking for guidance to the Netherlands, a country that, just like bowl-shaped New Orleans, sits mostly below sea level, keeping the water at bay with a construction of amazing scale and complexity. Others, pointing to Venice's long-standing adaptations, say it's best to let water flow through the city, depositing sediment to offset geologic subsidence—a model that would require a radical rethinking of architecture. Another idea is to let nature help by restoring the wetland buffers between sea and city.But before the options can be weighed, several unknowns will have to be addressed. One is precisely how the current defenses failed. To answer that, LSU coastal scientists Paul Kemp and Hassan Mashriqui are picking their way through the destroyed city and surrounding region, reconstructing the size of water surges by measuring telltale marks left on the sides of buildings and highway structures. They are feeding these data into a simulation of the wind and water around New Orleans during its ordeal."We can't say for sure until this job is done," says Day, "but the emerging picture is exactly what we've predicted for years." Namely, several canals—including the MRGO, which was built to speed shipping in the 1960s—have the combined effect of funneling surges from the Gulf of Mexico right to the city's eastern levees and the lake system to the north. Those surges are to blame for the flooding. "One of the first things we'll see done is the complete backfilling of the MRGO canal," predicts Day, "which could take a couple of years."The levees, which have been provisionally repaired, will be shored up further in the months to come, although their long-term fate is unclear. Better levees would probably have prevented most of the flooding in the city center. To provide further protection, a mobile dam system, much like a storm surge barrier in the Netherlands, could be used to close off the mouth of Lake Pontchartrain. But most experts agree that these are short-term fixes.The basic problem for New Orleans and the Louisiana coastline is that the entire Mississippi River delta is subsiding and eroding, plunging the city deeper below sea level and removing a thick cushion of wetlands that once buffered the coastline from wind and waves. Part of the subsidence is geologic and unavoidable, but the rest stems from the levees that have hemmed in the Mississippi all the way to its mouth for nearly a century to prevent floods and facilitate shipping. As a result, river sediment is no longer spread across the delta but dumped into the Gulf of Mexico. Without a constant stream of fresh sediment, the barrier islands and marshes are disappearing rapidly, with a quarter, roughly the size of Rhode Island, already gone.After years of political wrangling, a broad group pulled together by the Louisiana government in 1998 proposed a massive $14 billion plan to save the Louisiana coasts, called Coast 2050 (now modified into a plan called the Louisiana Coastal Area project). Wetland restoration was a key component. "It's one of the best and cheapest hurricane defenses," says Day, who chaired its scientific advisory committee.Although the plan was never given more than token funding, a team led by Day has been conducting a pilot study since 2000, diverting part of the Mississippi into the wetlands downstream of the city. "The results are as good as we could have hoped," he says, with land levels rising at about 1 centimeter per year—enough to offset rising sea levels, says Day.Even if the wetlands were restored and new levees were built, the combination of geologic subsidence and rising sea levels will likely sink New Orleans another meter by 2100. The problem might be solved by another ambitious plan, says Roel Boumans, a coastal scientist at the University of Vermont in Burlington who did his ph.D. at LSU: shoring up the lowest land with a slurry of sediment piped in from the river. The majority of the buildings in the flooded areas will have to be razed anyway, he says, "so why not take this opportunity to fix the root of the problem?" The river could deposit enough sediment to raise the bottom of the New Orleans bowl to sea level "in 50 to 60 years," he estimates. In the meantime, people could live in these areas Venice-style, with buildings built on stilts. Boumans even takes it a step further: "You would have to raise everything about 30 centimeters once every 30 years, so why not make the job easier by making houses that can float."Whether that is technically or politically feasible—Day, for one, calls it "not likely" —remains to be seen, especially because until now, the poorest residents lived in the lowest parts of the city. Any decision on how best to protect the city in the future will be tied to how many people will live there, and where. "there may be a large contingent of residents and businesses who choose not to return," says Bill Good, an environmental scientist at LSU and manager of the Louisiana Geological Survey's Coastal Processes section. It is also not yet clear how decisions about the reconstruction will be made, says Good, "Since there is no precedent of comparable magnitude." Every level of government is sure to be involved, and "the process is likely to be ad hoc."Even with the inevitable mingling of science and politics, we still have "a unique chance to back out of some bad decisions," says Good, who grew up in New Orleans. "I hope that we don't let this once-in-history opportunity slip through our fingers in the rush to rebuild the city:"1. The passage gives a general description of the suggestions to reconstruct New Orleans after Hurricane Katrina.2. Two examples to deal with water are Netherlands and Venice.3. The canals have nothing to do with the flooding.4. The levees will be shored up further with clear long-term fate.5. The basic problem for New Orleans is the subsidence of Mississippi River delta.6. The key component of Coast 2050 is wetland restoration.7. The plan of Coast 2050 will get billions of federal funding.8. New Orleans will likely sink ________________ by 2100.9. Another ambitious plan is to shoring up the lowest land with a slurry of sediment ________________.10. How decisions about the reconstruction will be made is also ________________.Part III Listening Comprehension (35 minutes)Section ADirections: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked [A], [B], [C] and [D], and decide which is the best answer. Then mark the corresponding letter on Answer sheet 2 with a single line through the centre.11. [A] The man doesn't want to see Mr. Williams.[B] Mr. Jones is in an inferior position to Mr. Williams.[C] Mr. Jones used to be in charge.[D] Mr. Williams doesn't want to see the man.12. [A] They need to make more efforts. [C]The others have done the greater part of it.[B] She felt a bit annoyed. [D] They've finished more than half of it.13. [A] She felt very sorry. [C] She was in a hurry.[B] She felt a bit annoyed. [D] She was surprised.14. [A] The knife belongs to him. [C] The man once borrowed Bob's knife.[B] Bob should mind his own business. [D] Bob's knife isn't as good as that of the man.15. [A] He'll miss the meeting that afternoon. [C] He won't miss the meeting.[B] He can't have an appointment with the host. [D] He is a hardworking man.16. [A] Because she didn't fulfill her promise.[B] Because her mother would be very angry.[C] Because she can't finish the job ahead of schedule.[D]Because she would be the last to finish the job.17. [A] He always talks on the phone for that long if it's toll free.[B] They had so much free time to talk on the phone for that long.[C] They talked on the phone for too long.[D] He wants to know what they talked about.18. [A] At a restaurant. [C] In the office.[B] At the cinema. [D] At a department store.Questions 19 to 22 are based on the conversation you have just heard.19. [A] He is a teacher of English in Cambridge. [C] He is a consultant to a Scottish company.[B] He is a specialist in computer science. [D] He is a British tourist to China.20. [A] 22℃[C] 25℃[B] 23℃[D] 34℃21. [A] With an English family. [C] With a language teacher.[B] In a flat near the college. [D] In a student dormitory.22. [A] Certain things cannot be learned from books.[B] Foreign students had better live on campus.[C] Choice of where to live varies from person to person.[D] British families usually welcome foreign students.Questions 23 to 25 are based on the conversation you have just heard.23. [A] Ways to determine the age of a fossil. [C] A comparison of two shellfish fossils.[B] The identity of a fossil the woman found. [D] Plans for a field trip to look for fossils.24. [A] He has never seen a fossil that old. [C] It is probably a recent specimen.[B] It could be many millions of years old. [D] He will ask the lab how old it is.25. [A] Take it to class. [C] Take it to the lab.[B] Put it in her collection. [D] Leave it with her professor.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you mustchoose the best answer from the four choices marked [A], [B], [C] and [D]. Then mark the corresponding letter on Answer Sheet 2 with a single line through the center.Passage OneQuestions 26 to 28 are based on the passage you have just heard.26. [A] She didn't want to be a typist. [C] She was not enthusiastic about typing.[B] She was not energetic enough to do the job. [D] She never went to a university.27. [A] Because nobody wanted to hire her as a pilot.[B] Because she wanted to prove that a woman could fly an airplane.[C] Her parents didn't want to hire a pilot.[D] She did not have enough money to hire a pilot.28. [A] Vienna. [C] India.[B] Baghdad. [D] Australia.Passage TwoQuestions 29 to 32 are based on the passage you have just heard.29. [A] Reading magazine articles. [C] Writing research papers.[B] Reviewing book reports. [D] Selecting information sources.30. [A] Gathering non-relevant materials. [C] Sharing notes with someone else.[B] Stealing another person's ideas. [D] Handing in assignments late.31. [A] In the student's own words. [C] In short phrases.[B] In direct quotations. [D] In shorthand.32. [A] It should be assimilated thoroughly. [C] It should be paraphrased by the author.[B] It should be enclosed in quotation marks. [D] It should be authorized by the source. Passage ThreeQuestions 33 to 35 are based on the passage you have just heard.33. [A] Seasonal variations in nature.[B] How intelligence changes with the change of seasons.[C] How we can improve our intelligence.[D] Why summer is the best season for vacation.34. [A] Summer. [C] Fall.[B] Winter. [D] Spring.35. [A] All people are less intelligent in summer than in the other seasons of the year.[B] Heat has no effect on people's mental abilities.[C] People living near the equator are the most intelligent.[D] Both climate and temperature exert impact on people's intelligence.Section CDirections: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blank, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.Building after building under water. (36) ________ in shelters. Thousands of others unsure where to go. (37) ________ for help. Anarchy. Bodies in streets. This is what one of America's historic cities was (38) ________ to this week by a powerful storm, Katrina.Officials want everyone still left in New Orleans, Louisiana, to leave for now. The (39) ________ of New Orleans says thousands may be dead. (40) ________ Katrina also caused death and (41) ________ in parts of Mississippi and Alabama along the Gulf of Mexico. Federal officials reported Friday that more than one million five hundred thousand homes and businesses (42) ________ without electric power.New Orleans is famous for its wild Mardi Gras (43) ________ and night life in the French Quarter. (44)________________________. New Orleans has depended on levees, dams made of earth, to control floods from the Mississippi River and Lake Pontchartrain.Katrina struck on Monday. New Orleans avoided a direct hit. But two of the levees failed the next day. Most of the city was flooded. Helicopters dropped huge sandbags to fill the breaks. (45) ________________________.America faces one of the worst natural events in its history. President Bush says the recovery will take years.(46) ________________________. The Bush administration is expected to ask for more in the weeks to come.Part IV Reading Comprehension (Reading in Depth) (25 minutes)Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the center. You may not use any of the words in the bank more than once.Questions 47 to 56 are based on the following passage.Blue is the world's favorite color. It is also the color most often 47 with intellect and authority.Most uniforms are blue. In Greek and Roman mythology, blue is the color of sky gods. In the Old Testament, God is 48 by deep blue. Blue and turquoise (青绿色)are represented by the Islamic religion. It is the 49 color in the mosques of the world.Blue symbolizes truth, peace and cooperation. It is the color of the flag of the United Nations and of Europe. As the coolest color of the spectrum, it is the hue most likely to have a receding effect. As in the skies and water that 50 us, blue is seen as a peaceful and 51 color. Blue light has seen to 52 blood pressure by calming the nervous system hence relaxing the body and mind. Blue creates large airy spaces. It makes rooms bigger.The wrong shade of blue can be uncomfortable. It can also be cold and sterile(枯燥的)unless 53 with warmer colors.Light and soft blue makes us feel quiet and protected from the bustle(喧闹)and 54 of the day. Blue bedrooms are restful. Blue bath rooms are appropriately watery. Blue 55 depth with greens and reds. Dark blue represents the night making us calm. Its apparently calming effect makes it the perfect tone for the quieter 56 of your living space.[A] represented [I] activity[B] engage [J] zones[C] refreshing [K] foolish[D] surround [L] line[E] curved [M] acquires[F] dominant [N] associated[G]lower [O] rash[H] balancedSection BDirections: There are 2 passages in the section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked [A], [B], [C], and [D]. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the center.Passage OneQuestion 57 to 61 are based on the following passage.Most shoplifters (商店扒手)agree that the January sales offer wonderful opportunities for the hard-working thief. With the shops so crowded and the staff so busy, it does not require any extraordinary talent to help you to take one or two little things and escape unnoticed. It is known, in the business, as "hoisting".But the hoisting game is not what it used to be. Even at the height of the sales, shoplifters today never know if they are being watched by one of those evil little balls that hang from the ceilings of so many department stores above the most desirable goods.As if that was not trouble enough for them, they can now be filmed at work and obliged to attend a showingof their performance in court.Selfridges was the first big London store to install closed-circuit videotape equipment to watch its sales floors. In October last year the store won its first court case for shoplifting using a evidence a videotape clearly showing a couple stealing dresses. It was an important test case which encouraged other stores to install similar equipment.When the balls, called sputniks, first make an appearance in shops, it was widely believed that their only function was to frighten shoplifters. Their somewhat ridiculous appearances, the curious holes and red lights going on and off, certainly make the theory believable.It did not take long, however, for serious shoplifters to start showing suitable respect. Soon after the equipment was in operation at Selfridges, store detective Brian Chadwick was sitting in the control room watching a woman secretly putting bottles of perfume into her bag."As she turned to go," Chadwick recalled, "she suddenly looked up at the 'sputnik' and stopped. She could not possibly have seen that the camera was trained on her because it is completely hidden, but she must have had a feeling that I was looking at her.""For a moment she paused, but then she returned to counter and started putting everything back. When she had finished, she opened her bag towards the camera to show it was empty and hurried out of the store."57. January is a good month for shoplifters because ________.[A] they don't need to wait for staff to serve them[B] they don't need any previous experience as thieves[C] there are so many people in the store[D] January sales offer wonderful opportunities for them58. The sputniks hanging from the ceiling are intended ________.[A] to watch the most desirable goods [C] to frighten shoplifters by their appearance[B] to make films that can be used as evidence [D] to be used as evidence against shoplifters59. The case last October was important because ________ .[A] the store got the dresses back[B] the equipment was able to frighten shoplifters[C] other shops found out about the equipment[D] the kind of evidence supplied was accepted by court60. The woman stealing perfume ________.[A] guessed what the sputniks were for [C] could see the camera filming her[B] was frightened by its shape [D] knew that the detective had seen her61. The woman's action before leaving the store shows that she ________.[A] was sorry for what she had done[B] was afraid she would be arrested[C]decided she didn't want what she had picked up[D] wanted to prove she had not intended to steal anythingPassage TwoQuestions 62 to 66 are based in the following passage.The largest shark known to us, Megalodon, is extinct. Or is it? Carcharodon Megalodon, commonly known as Megalodon, is believed to have lived between 1 million and 5 million years ago and thought to have been 52 feet long. It is (or was) a shark that had a jaw 7 or more feet wide. Fairly recently, there has been some speculation about whether it is extinct or just out of reach. But few people believe that Megalodon has found a home deep in the ocean.There are many known "Living Fossils": Coelacanth, Sea Cucumbers, Sea Urchins, Lobsters, Sea Stars. The common ones like lobsters and sea urchins are not really looked on as anything amazing. They've been around for thousands of years or more, and are easily accessible to us. What if they weren't accessible and yet still existed? We would label them extinct. The discovery of a live Coelacanth, a fish long believed extinct, challenged some scientists' long-held beliefs on extinction. There have been recent discoveries of incredibly large squid, anddeep-sea fish never before seen by scientists.In the 1960s the U.S. Navy set up underwater microphones around the world to track Soviet submarines. The network, known as the Sound Surveillance System, still lies deep below the ocean's surface in a layer of water known as the "deep sound channel". The temperature and pressure of the channel allow sound waves to travel undisturbed. NOAA's Acoustic Monitoring Project has been using the Sound Surveillance System to listen for changes in ocean structure like ocean currents or volcanic activity. Most of the sounds recorded are common and of no concern. One sound, identified in 1977 by U.S. Navy "spy" sensors, was odd. It was obviously a marine animal but the call was more powerful than any of the calls made by any other reported sea creature. It was too big for a whale. Could it be a deep-sea monster? One possibility was a giant squid, but no one is sure. It was named"Bloop". Could it be Megalodon? If Megalodon is still alive down in the bottom of the ocean, we may some day soon discover it. Then what? Deep sea diving will never be the same, that's for sure!62. The following is commonly known EXCEPT ________.[A] Megalodon, the largest shark, is extinct[B] Megalodon is not extinct but just out of reach[C] Megalodon was 52 feet long and had a jaw 7 or more feet wide[D] Megalodon lived between several million years ago.63. What makes scientists doubt about the belief that Megalodon is extinct?[A] The discovery of many "Living Fossils". [C] The discovery of a live Coelacanth.[B] The discovery of the fossils of lobsters. [D] The discovery of the fossils of sea urchins.64. What was special in their recorded sounds?[A] To listen for changes in ocean structure.[B] To listen for changes of ocean currents or volcanic activity.[C] To Make sure whether there was a giant squid deep in the ocean.[D] To follow the track of the Soviet warships under water.65. What was special in their recorded sounds?[A] A strange, powerful animal sound was heard. [C] A sea monster's sound was heard.[B] A big whale's sound was heard. [D] A giant squid's sound was heard.66. What can be concluded from the passage?[A] Scientists' discoveries always change people's belief.[B] There are too many secrets to be discovered.[C] Megalodon may be still alive deep in the ocean.[D] "Deep sound channel" allows sound waves to travel undisturbed.Part V Cloze (15 minutes)Directions: There are 20 blanks in the following passage. For each blank there are four choices marked [A], [B], [C] and [D] on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer sheet 2 with a single line through the center.Before the 20th century the horse provided day to day transportation in the United States. Trains were used only for long-distance transportation.Today the car is the most popular 67 of transportation in all of the United States. It has completely 68 the horse as a means of everyday transportation. Americans use their car for 69 90 percent of all personal 70 .Most Americans are able to 71 cars. The average price of a 72 made car was, 500 in 1950, 740 in 1960 and up 73 750 in 1975. During this period American ear manufacturers set about 74 their products and work efficiency.Meanwhile, the yearly income of the 75 family increased from 1950 to 1975 76 than the price of cars. For this reason, 77 a new car takes a smaller 78 of a family's total earnings today.In 1951 79 it took 8.1 months of an average family's 80 to buy a new car. In 1962, a new car 81 8.3 of a family's annual earnings. By 1975 it only took 4.75 82 income. In addition, the 1975 cars were technically 83 to models from previous years.The 84 of the automobile extends throughout the economy 85 the car is so important to Americans. Americans spend more money 86 their cars running than on any other item.67. [A] kinds [B] means [C] mean [D] types68. [A] denied [B] reproduced [C] replaced [D] ridiculed69. [A] hardly [B] nearly [C] certainly [D] somehow70. [A] trip [B] works [C] business [D] travel71. [A] buy [B] sell [C] race [D] see72. [A] quickly [B] regularly [C] rapidly [D] recently73. [A] on [B] to [C] in [D] about74. [A] raising [B] making [C] reducing [D] improving75. [A] unusual [B] interested [C] average [D] big76. [A] slowest [B] equal [C] faster [D] less77. [A] bringing [B] obtaining [C] having [D] purchasing78. [A] part [B] half [C] number [D] side79. [A] clearly [B] proportionally [C] obviously [D] suddenly80. [A] income [B] work [C] plants [D] debts81. [A] used [B] spent [C] cost [D] needed82. [A] months [B] dollar [C] family [D] year83. [A] famous [B] quick [C] superior [D] inferior84. [A] running [B] notice [C] influence [D] discussion85. [A] then [B] so [C] as [D] which86. [A] starting [B] leaving [C] keeping [D] repairingPart VI Translation (5 minutes)Directions: Complete the sentences on Answer Sheet 2 by translating into English the Chinese given in brackets.87. The chairman requested ________________________(所有书面资料都要储存在电脑硬盘上).88. ________________________ (如果我是你),I would have accepted such an offer given by the manager.89. Do you mind ________________________(推迟这次会议到本季度末)?。
Model Test 1-答案+原文
Model Test 111. A 12. A 13. C 14. D 15. C 16. A 17. B 18. B 19. B 20. C 21. D 22. D 23. C 24. B 25. D 26. D 27. A 28. B 29. A 30. C 31. B 32. C 33. D 34. B 35. A36. future 37. trained 38. admire 39. schedule40. considerate 41. waste 42. visible 43. necessarily44. something that is simply there around them, not something they can use45. the fast food industry can be seen as a clear example of American cultural product46. spread around the world, they have been viewed as symbols of American society and cultureSection A11. M: What was it like working with those young stars?W: It was a great group, I always got mad when people said that we didn’t get along, just because we’re girls, there was never a fight. We had a great time.Q: What does the woman mean?12. M: Are you telling me you don’t have a housekeeper?W: No, we don’t. If you make a mess, you clean up yourself.Q: What do we learn from this conversation?13. M: I hear that the Edwards are thinking of buying another house.W: Should they be doing that with all the other expenses they have o pay? Anyhow, they are over 70 now, their present house is not too bad.Q: What does the man imply?14. W: You look like you are freezing to death. Why don’t you put this on?M: Thank you, it was so warm at noon, I didn’t expect the weather to change so quickly.Q: What do we learn from the conversation?15. W: I’ll have the steak, French fries, and let’s see, chocolate ice cream for dissert.M: Oh, oh, you know these things will ruin your health, too much fat and sugar, how about ordering some vegetables and fruit instead?Q: Where does the conversation most probably take place?16. W: What was it like growing up in New York’s Bronx District? Was it safe?M: To me it was, it was all I knew. My mom would send me to the shop and I’d go and buy things when I was about 8 years old.Q: What do we learn from the conversation?17. W: Nice weather, isn’t it? Oh, I’ve seen you around the office, but I don’t think we’ve met, Iam Henry Smith, I work in the Market Research Section.M: Nice to meet you, Henry, I am Helen Grant, I am in the Advertising Section on the ninth floor.Q: What can we infer from the conversation?18. M: Ma’am, I hear you have an apartment for rent, can I take a look at it?W: Sure, you’re welcome any time by appointment, but I have to tell you the building is close to a railways. And if you can’t put up with the noise you might as well save the trip.Q: What do we learn from the conversation?Conversation 1W: Please have a seat, Mr. Saunders. I received your job resume last week, and it was very impressed.M: Thank you!W: We are a small financial company trading mostly stocks and bonds. May I ask why you are so interested in working for us?M: Your company has an impressive reputation and I’ve always wanted to work for a smaller company.W: That’s good to hear. Would you mind telling me a little bit about your present job?M: I’m currently working in a large international company in charge of a team of 8 brokers. We buy and sell stocks for major clients worldwide.W: Why do you think you are the right candidate for this position?M: As a head broker, I have a lot of experiences in the stock market, I deal with the clients on the daily bases, and I enjoy working with people.W: Well, you might just be the person we’ve been looking for. Do you have any questions?M: Aha, if I were hired, how many accounts would I be handling?W: you will be working with two other head brokers, in another words, you will be handling about a third of our clients.M: And who would I report to?W: Directly to me.M: I see. What kind of benefits package do you offer?W: Two weeks of paid vacation in your first year employment, you are also been entitled to medical and dental insurance, but this is something you should discuss with our Personnel Department. Do you have any other questions?M: No not at the moment.W: Well, I have to discuss you application with my colleagues and we’ll get back to you early next week.M: OK, thanks, it’s been nice meeting you!W: Nice meeting you too! And thanks for coming in today.19. What’s the purpose of Mr. Saunders’ visit?20. What is Mr. Saunders’ current job?21. What can we conclude from the conversation?Conversation 2M: Hey, Karen, you are not really reading it, are you?W: Pardon?M: The book! You haven’t turned the page in the last ten minutes.W: No, Jim, I suppose I haven’t. I need to get through it, though, but I keep drifting away.M: So it doesn’t really hold your interest?W: No, not really. I wouldn’t bother with it, to be honest, but I have to read it for a seminar.I’m at a university.M: It’s a labor of labor then rather than a labor of love.W: I should say, I don’t like Dickens at all really, the author, indeed, I am starting to like the whole course less and less.M: It’s not just the book,, it’s the curse as well?W: Yeah, in a way, although the curse itself isn’t really that bad, a lot of it is pretty good, in fact, and the lecturer is fine, as to me, I suppose, you see, I want to do philosophy rather than English, but my parents took me out of it.M: So the courses are OK as such, it’s just that had if been left to you, you would choose a different one.W: Oh, they had my best interest and heart of course, my parents, they always do, don’t they?They believe that my job prospect would be pretty limited with the degree of philosophy.Plus, they give me a really generous allowance, but I am beginning to feel that I’m wasting my time and their money. They would be so disappointed though if I told them I was quitting.22. Why can’t Karen concentrate on the book?23. Why is Karen starting to like the course less and less?24. Who thinks Philosophy graduates have limited job opportunities?25. What is Karen thinking of doing?Section BPassage OneIn Greece, only rich people will rest in peace for ever when they die. Most of the population, however, will be undisturbed for only three years, then they will be dug up, washed, compressed into a small tin box, and placed in a bone room. If the body has only partially decayed, it is reburied in a smaller cheaper grave, but not for long, the body will be dug up again some time later when it has fully decayed. Buying a piece of land for a grave is the only way to avoid this process. The cost of the grave is so great that most p0eople choose to rent the grave for three years and even after it has been dug up, lasting peace is still not guaranteed. If no one pays for renting space in the bone room, the skeleton is removed and stored in a building in a poor part of the town. Lack of space in Athens is the main reason why the dead are dug up after the three years. The city is so overcrowded that sometimes dead bodies are kept in the hospitals for over a week until a grave is found. Athens’ city council wants to introduce cremation, that is burning dead bodies as a means of dealing with the problems. But the Greek church resists this practice, they believe the only place where people burn is hell, so burning dead bodies is against the Greek concept of life after death. To save space, the church suggested burying the bodies standing up instead of lying down. Some people proposed building multi-storey underground grave yards.26. What must Greeks do to keep the dead resting in ever-lasting peace?27. Why are most dead bodies in Athens dug up after three years?28. What suggestions does the church give about the burying of dead bodies?29. What practice does the Greek church object to?Passage TwoIf you visit a big city anywhere in the world, you will probably find a restaurant would serve the food of your own native country. Most large cities in the United States offer international sample of foods. Many people enjoy eating the food of other nations. This is probably one reason why there are so many different kinds of restaurants in the United States. A second reason is that many Americans come from other part of the world. They enjoy tasting the foods of their native lands. In the city of Detroit, for example, there are many people from western Europe, Greece,Latin America, and the Far East. There are many restaurants in Detroit which serve the foods of these areas. There are many other international restaurants too. Americans enjoy the foods in these restaurants as well as the opportunity to better understand the people and their way of life. One of the most common international restaurants to be found in the United States is the Italian restaurant. The restaurant may be a small business run by a single family. The mother of the family cooks all of the dishes, and the father and children serve the people who come to eat there. Or it may be a large restaurant owned by several different people who worked together in the business. Many Italian dishes that Americans enjoy are made with meats, tomatoes and cheese, they are very delicious and tasty.30. Why are there so many international restaurants in the United States?31. Why do Americans like to go to international restaurants apart from enjoying the foods there?32. How is a typical Italian family restaurant run in the United States?Passage ThreeOne winter day in 1891, a class at a training school in Massachusetts, U.S.A, went into the gym for their daily exercises. Since the football season had ended, most of the young man felt they were in for a boring time.But their teacher, James Nasmith had other ideas. He had been working for a long time on a new game that would have the excitement of the American football. Nasmith showed the men a basket he had hung at the each end of the gym, and explained that they were going to sue a round European football, at first everybody tried to throw the ball into the basket no matter where he was standing. “Pass! Pass!” Nasmith kept shouting, blowing his whistle to stop the excited players. Slowly, they began to understand what was wanted of them. The problem with the new game, which was soon called “basketball”, was getting the ball out of the basket. They used ordinary food baskets with bottoms and the ball, of course, stayed inside. At first, someone had to climb up every time a basket was scored. It was several years before someone came up with the idea of removing the bottom of the basket and letting the ball fall through. There have been many changes in the rules since then, and basketball has become one of the world’s most popular sports.33. What did Nasmith do to entertain his students one winter day?34. According the speaker, what was the problem with the new game?35. How was the problem with the new game solved?。
Model test 1
Model test 1Air pollutionPeople nowadays have realized the serious problem of the air pollution caused by the car. One way to get rid of the polluted car is to design a car that does not pollute. That is what several of the large car factories have been trying to do. But to build a clean car is easier said than done. Progress in this filed has been slow. Another way is to take the place of the car engine something else. Inventors are now working on steam cars as well as electric cars.Mini-lectureIf you are a college student in the United States, you are most likely to live in dorms. You don’t have a lot of choice when it comes to where you’re going to live. You will probably be asked to fill out a form indicating your housing choices. You can list your ideal dorms on campus (If you’ve visited or done some research), but there's no guarantee that you’ll end up there. Here are a few examples of the different types of college dorms or living arrangements you might encounter. The first type is all first year. Some dorms are set aside for first-year students only. The benefit is no upperclassmen ticked off by all the noise and chaos and you get to meet first-year students who share the similar experiences and feelings as you do everyday.The second type is single gender. There tend to be fewer all-male dorms than all-female. The disadvantage of a single-gender dorm is the fun factor. It’s simply more exciting to be in a coed dorm. Also. Coed dorms eliminate the mystique of the opposite sex. When you’re l iving with both guys and girls, everyone becomes just another person in the hallway.Unlike single gender for the whole building, single-gender floors are coed, but split the girls and boys up by floor. Depending on dorm rules, you may or may not be able to mix after certain hours.Then there is coed by room. Many dorms are coed by room girls and boys sharing walls but not rooms. Exciting at first, yes. However, this excitement can quickly turn sour when romantic relationships in the dorm go bad.The quiet-floor dorms set aside quiet floors where it’s easier to study. The fear is often that the resident on these floors are uptight and won’t party, but that’s not always the case. They just don’t want the party in their faces. However, quiet is relative to t he listener, and many people will find these floors noisy, especially if the rules aren’t well enforced.Special focus. Some campuses offer special dorm floors, such as those for students with an interest in majoring in music or languages, or are dedicated to earning academic honors. International dorms. Some college have dorms specially for students from other countries. Domestic students are allowed to live in these dorms too, but priority is given to those students coming from abroad.These are the most common types of dorm in American colleges or universities, and there are usually different rules in different dorms. But here are some common dorm rules that many colleges have.First, no alcohol. As is stated by the US law, the minimum legal drinking age is 21 and so it is illegal for anyone to drink alcohol under the age of 21. some dorms allow students who are over 21 to have alcohol in their rooms. At a first year, you are probably not over 21.Second, no fire hazards. These include candles, cigarettes, portable heating units, and sometimes irons. Some dorms still have smoking rooms, but this is becoming less common.Third, no unruly conduct. In other words, no fighting, destroying dorm property, setting off fire alarms… you get the idea.No appliances. Some dorms have rules about what kinds of kitchen items you can bring. Some only allow low-wattage microwaves and coffeemakers, and others don’t allow anything, not even a little fridge. Check with your dorm before you bring any appliances.No loud music or voices at night. Quiet hours generally start at 10 or 11 p.m. No loud music or voices after this time.Conversation 1M: Tina, I’m reading an article and just run across a term “the Greek System”. What is that?W: Oh, the Greek System is a very unique part of American college education. Most American colleges have these students organizations on campus. A boy’s group is called a fraternity which means brotherhood, and a girl’s groups is called a sorority. These fraternities and sororities have the ir own houses on campus. Collectively, these groups are called the “Greek System,” because each house is named after two or three letters of the Greek alphabet.M: So they are student organizations. What do they do?W: Well, there are different kinds of them. There are social Greek organizations, as well as those dedicated to a particular profession, such as medicine, law, engineering, or journalism. Also. Greek organization do a lot of community service: they raise money for charities, volunteer in soup kitchens and for other community organizations, and organize food drives on campus.M: Hmm I see. Why do students join these groups?W: There are many reasons to go Greek, “to go Greek” means to join a fraternity or sorority. For example, statistics show that there is a lower dropout rate among Greek students than non-Greek students. Also, once you join the Greek system, you immediately become part of a big community. There are lot of events offering you leadership opportunities, which will serve you well later in life. The community service will also add credits to your resume. These events are great resume builders, and employers see participation in Greek organization as a plus. Among other things, it means that you have some measure of discipline and that you managed to maintain decent grades in college despite your extracurricular commitments. There is established support structure, which helps students when they are going through hard times, including tutoring and academic support, and also networking opportunities after graduation. Besides, there are many parities, sports events, and nice houses with great cooks.M: Wow, that does sound fun!W: But of course, there are also reasons not to join a Greek organization. There are dues and fees, which can add to your financial burden. You also may not be the “frat type,” and prefer to go it alone. After all, you’ll be able to find friends even if you don’t join a house. While it can be tough to be an independent on a campus that’s mostly Greek, but there is no obligation to join.M: I see. Thank you for the explanation.W: You are very welcome.Q1: Which of the following statement is true about Greek System?Q2: The Greek organization have the following kinds EXCEPT?Q3: Which does the phrase “to go Greek” mean?Q4: Which of the following is NOT one of the reasons for joining the Greek organization?Q5: Which of the following is one of the reasons for not joining Greek organizations?Conversation 2W: Good morning! What can I do for you?M: Good morning! I want to open a bank account.W: No problem. Please fill out this form first. And may I have a look at your driver’s license or personal ID card?M: I don’t have a local driver’s license yet. I just arrived from Britain last week. But I have my passport with me. Here you are.W: Thanks. Would you like to open a checking account or savings account?M: I think I’ll do both.W: Great. And how much would you like to open your account with? We usually ask for a minimum sum of 10 dollars.M: Well I’m going to deposit 360 dollars into my checking account t start with. Also I need to transfer money to my account in Britain to pay back my student loans on a regular basis. In fact, I wanted to ask you about that. What’s the best way to do it?W: It depends on which bank you are with.M: It’s Bank of England.W: Ok, I will check that in a minute. If we have links with them, we can do the direct transfer. It’s not a big problem either way. By the way, would you also like to apply for a credit card? When you link the credit card with your checking account, you don’t need to worry about paying the money back every month. It will do automatically.M: That sounds good.W: OK, let’s see. How often would you like to receive statements?M: I haven’t really thought about it. What’s the usual thing?W: It’s up to you. Some people like it weekly.M: Oh no. That's too often. Can I have them sent once a month?W: Yes, that’s fine. Do you want to have the paper statement sent to your mailbox or just through email?M: I think just email will do. Let’s save the paper and go green.W: Great! Email statements sent monthly. Is there anything else?M: I was thinking of registering for your Internet service.W: Oh yes. Do you mind coming with me to the desk over there. I can guide you through the steps to activate online banking. I can’t do it on the computer at the counter here.M: Of course. No problem.W: Let me first input your information here, as I already have it for opening. Now, please take a look and confirm that all the information is correct.M: Let me see. Hmmm… yes, everything is correct. Thank you.W: Now please set up a password that contains at least 8 characters of both letters and numbers. M: OK… done!W: Would you like to receive the information about the bank and other services, insurance, loans, anything like that?M: I don’t think so, thanks.W: that’s ok, then.Q6: Which personal identification document does the man provide?Q7: Which account does the man NOT open?Q8: How does the man want to have the bank statements sent to him? Q9: What’s the password requirement for the online banking account? Q10: Which of the following statement is true?。
Model specification test
(2)根据p值:P=Prob(|x|>|t|);
p > ,则接受H0; p < ,则拒绝H0
alpha/2
alpha/2
0
-4
-2
0
2
4
t检验 ——回归参数的约束检验检验:左单端
原假设和备择假设:H0: i = i * ; H1: i < i *
检验统计量:
Model specif T test ~ t F test ~ F LR test ~ χ2 LM test ~ χ2 Wald test ~ χ2 模型结构的推断 Chow test(F test) Granger test(F test) 模型残差的推断 异方差检验(F, LM test) 自相关检验(F, LM test)
t检验
——回归参数的约束检验:双侧
原假设和备择假设:H0: i = i * ; H1: i i *
检验统计量:
判断规则
ˆ ˆ * i i t i i ~ t(T k 1) ˆ ˆ s ( i ) s ( i )
(1)根据t值: |t|>t1-/2,(T-2),则拒绝H0; |t|<t1-/2,(T-2) ,则接受H0
F检验
——参数线性约束检验(多变量的显著性检验)
y = X1β1 + X2β2 + u H0:β2=0;H1:β2≠0
设(X1, X2)共包含K个变量, X1包含K1个变量,X2包含K2个变量
无约束模型:y = X1β1 + X2β2 + u
受约束模型: y = X1β1 + u
stata中test用法 -回复
stata中test用法-回复Stata中的test命令是一种用于对统计模型进行假设检验的功能强大且常用的工具。
在Stata中,test命令通常用于检验多个系数是否为零、比较模型的拟合优度以及比较不同模型之间的差异等。
本文将一步一步回答有关Stata中test命令的问题,并提供详细的示例来解释其用法和解读结果。
首先,让我们来了解一下test命令的用途和基本语法。
test命令的一般形式如下:test [hypothesis] [model1] [model2] ...其中,[hypothesis]表示我们要检验的假设,可以是单个系数的值、多个系数的组合或者两个模型之间的差异。
[model1]、[model2]等表示我们要进行检验的模型。
下面我们将介绍几种在Stata中常见的应用test命令的情景。
1. 检验单个系数是否为零首先,我们可以使用test命令来检验单个系数是否等于某个特定的值。
假设我们有一个回归模型,并且我们想要检验其中一个变量的系数是否等于0。
我们可以通过test命令进行如下的检验:reg y xtest x = 0在上述示例中,我们使用reg命令拟合了一个包含一个自变量x和一个因变量y的线性回归模型。
然后,我们使用test命令检验x系数是否等于0。
如果p值小于我们预设的显著性水平(通常为0.05),我们可以拒绝零假设,即x系数不等于0。
2. 检验多个系数是否为零除了检验单个系数是否为零,test命令还可以用来检验多个系数是否同时为零。
在Stata中,我们可以通过使用test命令的and选项来实现多个系数的同时检验。
例如,如果我们想要检验两个变量x和y的系数是否同时等于0,我们可以使用如下的命令:reg y x ytest (x = 0) (y = 0), and在上述示例中,我们先使用reg命令拟合了一个包含两个自变量x和y 以及一个因变量y的回归模型。
然后,我们使用test命令进行了两个系数的同时检验。
Model Test 1(除完型之外所有的答案-阅读带解析+听力原文)
Model Test 1Part 1 writingToo Much Expenditure on FashionThe ever-changing fashion mirrors the advance of human civilization. And the desire for beauty and fashion is blameless. However, some college students dip into their purses in order to keep up with the Joneses. Some of them even cut down the expending for books and meals to satisfy their desire for fashionable dress.As far as I am concerned, college students should cherish ambitions rather than become slaves of fashion. Attention should be paid to the disadvantages of the blinded following of fashion. Firstly, the pursuit of fashion has made many college students get lost. Some of them even fail to focus on their study. Besides, it is a costly hobby to follow the tide, which will impose financial stresses on their parents.All in all, we should adopt a more reasonable attitude towards the pursuit of fashion.Part ⅡReading Comprehension (Skimming and Scanning)(15 minutes) .1. A2. A3. D4. C5. B6. B7. C8. development staff 9. straightforward 10. adult studentsPart Ⅲ Listening ComprehensionSection A11—15 DADCC 16—20 ADBCD 21—25 ADDBBSection B26—30 BDCBC 31—35 DBBDASection C36.feared 37. rank 38.including 39.developing40. prizes 41.accomplishments 42. considered 43.manners44. This impression may be created when visitors notice young Americans asking questions and arguing with older people45. It is vital to remember that it is the person’s ideas that are being questioned, not the individual himself46. so that the work of the business can progress in the most effective manner possible Part ⅣReading Comprehension(Reading in Depth)(25 minutes)Section A47. K 该空应填入一名词。
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M o d e l-T e s t-1News Report OneThe United States central bank has raised an important interest rateby one-fourth of 1 percent. The federal funds rate, a rate paid by banksfor short-team loans, is now one-half of 1 percent.Janet Yellen, the first woman to lead the Federal Reserve System, spoke after the announcement. The decision was based on a few factors. Yellen said Economic growth is expected to continue in the U.S. Another reason to increase interest rates, Yellen noted, was the low official rate of inflation . The central bank has said its target inflation rate is 2 percent. It says that rate would help support employment and keep prices stable. However, inflation currently is not at the target rate, but below 1 percent. The federal reserve chief also said the strong labor market providedanother reason to raise rates. The U.S. Economy is adding about 20000jobs each month.1.What is the news report mainly about?2 . What do we learn about the target inflation rate set by the central bank? News Report TwoThe campaign group Amnesty International says it has evidencesthat Russian air strikes in Syria since September have killed hundreds of civilians, causing widespread to basic facilities. Amnesty suggests the strikes are in violations of international humanitarian law and accuses Russia of attempting a cover-up. After interviewing witnesses, doctorsand human rights groups, Amnesty reports that homes and hospitals were hit as well as a market and a Muslim building. In most cases, the location and timing of the attacks correspond with Russian defense ministry reports on air strikes though it says it was targeting so-called IS. Militants. Despite dropping thousands of bombs in Syria, Russian officials have never acknowledged causing any civilian casualties there. There were proud of their effective pinpoints strikes against terrorists and had dismissed previous claims to the country as part of an anti-Russian information war by the west3.What did Amnesty International say about the Russian air strikes?4.What was Russia’s reaction towards civilian casualties?News Report ThreeRoad traffic crashes kill 1.25 million people each year worldwide. But the Word Health Organization (WHO) say they are preventable.The report surveyed 180 countries, and it shows the number of annual deaths from traffic crashes is stabilizing. [5]And that is good news the number of motor vehicles grows worldwide.But the data also show that road crashes are the No.1 cause of death among young people aged 15 to 29. Young adults around the world are the worst driving risks. Even in the U.S., drivers aged 15 to 24 accountfor about 30 percent of all driving-related accidents.The WHO report also finds a big gap in road safety and deaths between poor and rich countries. Poor countries have only 54 percent of world’s vehicles. But those countries have some of the worse safety statistics in the report.‘‘Africa has only two percent of the word’s vehicles, but has the highest death rat e on the road. ’’ That is what Etienne Krug, the head of theWHO Department of Non-communicable Diseases, says. Sweden, the Netherlands and the United kingdom are leaders in preventing traffic deaths. The highest death rates are in Africa and the Middle East.5.Why is the survey result good news?6.What does the survey report show?7.What do we learn about the road crashes in poor countries?Conversation OneW: Hi, Mr. Johnson. When do you usually get up?M:I usually get up about five ,and then go for jog before breakfast, We usually have breakfast at around 6:30. Then I have time to read the papers. W: Which paper do you read?M: Well, the Financial Times, the Times and the Independent. I don’t exactly read them from cover to cover.W: I see.M: After reading. I have for the office. I’m usually behind my desk by 7:30. The first job of the day is the post. My secretary sorts out those letters which need immediate attention. Then at about 9:00, I have a daily meeting with my deputy. We run through the agenda for the day.W: What’s a typical day like?M: Well, there’s no such things as a typical day, but I have regular morning meetings with my Finance and Sales Directors. Of course, I travel a lot , then I keep up-to-date by telephone.W: What about lunch?M: I try to have lunch in the company canteen as often as possible. Of course, sometimes I have lunch out with some customers.W: What about the afternoons?M: I often go down to our plant and see how things are going. We have weekly management committee meetings on Friday afternoon. Then there are monthly board meetings, usually the first Monday of the month.W: When do you finish work?M: At about seven. If there is nothing evening, I’ll go home. More often than not, there’s a dinner engagement.W: All right, thank you for accepting my interview, Mr. Johnson.8.What does Mr. Johnson usually do before breakfast?9.What is Mr. Johnson’s first job in his office?10.W hat is Mr. Johnson’s typical day like?11.W hat does Mr. Johnson do on Friday afternoon/Conversation TwoW: Hello?M: Hi, Jessica?W: Oh, hi, Mike. What’s up?M: [12]Sorry to call you so lat but I’m having trouble with the math assignment.W: Don’t worry, it’s not that bad. But I do have to say that I haven’t worked this hard on an assignment all term. I’ve already spent more than two hours on it and I’m still not halfway through it.M: Well, that’s still farther than I’ve gotten. I have no idea even where to start. I was thinking about calling Professor Johnson.W: Now? [13]But the assignment’s due tomorrow.He’ll wonder why you waited until now to ask for help.M: This always happens. I mean, when I first got the assignment, [14]I thought it looked OK and I figured I could do it in two hours. But now, it turn s out I can’t even figure out how to get started.W: Oh… well, [15]do you want to come over? I could show you what I’ve worked out so far, and then we could work on the rest together.M: Are you sure? I hate to interrupt you. I don’t want to hold you back.W: It’s OK, I’m sick of working on it alone. And anyway, if I’m thinking out loud, it’ll probably help clarify the most difficult parts for me, too. Headed for another bad grade.W: No problem.M: See you in a few minutes.W: Okay. Bye.12 Why does the man call the woman?13 When will the speakers have to hand in the assignment?14 What do we know about the man?15 How does the woman respond to the man’s problem?Passage OneSome kinds of mental skills naturally decrease as people get older. [16]Yet research seems to show that some training can improve such skills. A recently published study also appears to demonstrate that the good effect of training can last for many years after that training has ended.[17]Researchers at Johns Hopkins University in Maryland wanted to learn how long memory and thinking skills would last in older people who trained to keep them. The people were part of the ten-year research project. They were taught methods meant to improve their memory, thinking and ability to perform everyday tasks.More than 2,800 volunteered for the study. Most studied when they were than 70 years old. The volunteers took one of several short training classes meant to help them keep their mental abilities. One class trained participants in skills including how to remember word lists. Another group trained in reasoning.[18]A third group received help with speed-of-processing-speed of receiving and understanding information . A fourth group-the control group did not get any training.Earlier results had established that the training helped the participants for up to five years .Now, lead study writer George Rebok says, [19] the research showed most of the training remained effective a full ten years later. Professor Rebok and his team found that the people trained in reasoning and speed-of-processing did better on tests than the control group. [19]They are wondering whether those effects which endured over time would still be there ten years following the training, and in fast, that’s exactly what they found.16. What can improve mental skills according to the research?17. What was the purpose of Johns Hopkins University’s research?18. What does the term speed-of-processing refer to?19. What do we learn about the effects of most training?Passage TwoSingapore has topped 131 cities globally to beco me the world’s most expensive city to live this year, ac-cording to the Economist Intelligence Unit. [20]The city’s strong currency combined with the high cost of running a car and soaring utility bills contributed to Singapore topping the list. It is also the most expensive place in the world to buy clothes.[21]Singapore replaces Tokyo, which topped the list last year. Other cities making up the top five most expensive cities to live in are Paris, Oslo, Zurich and Sydney, with Tokyo falling to sixth place. The EIU’s Worldwide Cost of Living Survey is a relocation tool that uses New York City as a base. It looks at more than 400 individual prices. The editor of the report Jon Copestake said , improving sentiment in structurally expensive European cities combined with the continued rise of Asian cities means that that these two regions continue to supply most of the world’s most expensive cities. But Asian cities also continue to make up many of the world’s cheapest, especially in the Indian areas.[22]Most Asian cities that top the list are there for mainly higher costs of groceries. Tokyo is still at the top of the list for everyday food items.20.What contributed to Singapore being one of the world’s most expensive cities to live in?21.What city topped the list last year?22.What is the main reason that most Asian cities top the list? Passage Three[23]According to new research by British scientists, teens who don’t smoke, drink only moderately or not at all, and who don’t eat much junk food tend to be happier than other teens. The study looked at 40,000 British households and came up with some interesting findings. For example, kids who never drank alcohol were up to six times more likely to report higher on happiness than kids who drank. And teens who smoked were five times less likely to rate high on happiness charts compared to kids who don’t smoke. Same goes for diet and physical activity. The more fruits and vegetables kids ate, and the more hours they spent playing sports, the happier they were.Now, of course this doesn’t mean that not smoking or drinking, and playing sports guarantees happiness. [24]It could be that kids who have happy characters tend to be more active and less inclined to drink or smoke. And it could equally be the case that kids who are unhappy are more likely to drink and smoke and eat junk food, instead of the other way around.[25]Other studies have shown that exercise is a proven way to fend off and treat anxiety and depression. Future studies may support the notion that other healthful behaviors, including keeping away from smoking, drinking, and eating too much junk, can ward off sadness and boost happiness, too.23. Who are more likely to be happier according to the study?精品文档24. What can we infer from the research?25. What is a proven way to get rid of anxiety?收集于网络,如有侵权请联系管理员删除。