facts复习思考题
最新初中英语语法知识—名词的知识点总复习有答案解析(1)
一、选择题1.In fact (事实上), she ________ ________ many ________.A.doesn’t has; toies B.don’t has; toies C.doesn’t have; toys D.don’t have; toys 2.________wild animals are disappearing because of the ________of their living areas. A.The number of; lost B.The number of; losing C.A number of; loseD.A number of; loss3.I’m hungry. I want some _________.A.water B.bread C.toys D.homework 4.Is it a picture_________ your school?A.of B.to C.and D.with 5.—Let’s make a banana milk shake.—How many ________ do we need?A.bananas B.cup of milk C.honey6.There are two________ near our school.A.shoe shops B.shoes shops C.shoe's shops D.shoes' shops 7.—Do _________ like going to ___________?—I don’t know.A.woman teachers, clothes shops B.women teachers, clothes shops C.woman teachers, sport shops D.women teachers, vegetables shops 8.---- _________ is it from Nanjing to Beijing?--- It’s less than three ___________ flight.A.How long, hour’s B.How far, hour’sC.How long, hours’D.How far, hours’9.—Do you know Shanghai is one of _______ in the world?—Yes, it’s bigger than _______ city in China.A.the biggest city; any B.the biggest cities; anyC.the biggest cities; any other D.the biggest cities; the other 10.—There are beautiful flowers everywhere to celebrate the National Day, and we have —________ holiday. That means we have seven days ________ for this public holiday.A.a seven-day; off B.a seven-days; awayC.seven-day; over D.a seven-days’; off11.Peter would like a bowl of ________noodles.A.tomato and egg B.tomato and eggsC.tomatoes and eggs D.tomatoes and egg12.—Do you think it is _______good advice?—Yes, it’s really _______useful suggestion.A.a; an B./; a C.a; a D./; an13.I am hungry. But there is little left. I have to go and buy some.A.sandwiches B.potatoes C.water D.bread 14.—These days, more and more kids have problems with their sight.— They should do eye________and take________every day.A.exercises; exercises B.exercises, exerciseC.exercise. exercises D.exercise, exercise15.It's about ten __________ walk from here.A.minutes' B.minute's C.minutes D.minute of16.I share my room ______ a friend of _________.A.to, me B.with, mine C.with, me D.from, mine 17.— Is this room yours? —No, it's not__________.It's __________.A.mine; Lily's and Lucy's B.my; Lily and Lucy'sC.my; theirs D.mine; Sally's18.________ your reading speed, or you can’t finish the English reading materials in ________ limited time.A.Increase; 100 minutes’B.To increase; a 100-minute C.Increasing; 100-minutes’19.Can you tell me the ________ habits of the butterflies?A.living B.live C.lives D.lived20.There are many ________ animals in the zoo. I like pandas best. Because they are ________ cute.A.kind of; kinds of B.kind of; kind of C.kinds of; kinds of D.kinds of; kind of 21.This is Bob Smith. His last name is________.A.Bob B.Smith C.Bob Smith22.A number of________ will take part in the sports meeting and the number of them________ over 300.A.students; are B.student; are C.students; is23.This zebra is an ______ animal. It lives in ______ now.A.Africa; Africa B.African; AfricaC.Africa; African D.African; African24.In fact, he didn’t explain the cause the accident us clearly.A.for; to B.of; to C.for; for D.of; for25.The computer is _______________.A.Amy's and Lily's B.Amy and Lily C.Amy's and Lily D.Amy and Lily's 【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【分析】【详解】句意:事实上,她没有很多玩具。
(0161)《中学英语教学法》复习思考题
(0161)《中学英语教学法》复习思考题一、判断正误题(8分)The following statements are about the facts presented in the textbook, please indicate in the brackets before the statements whether they are true( T ) or ( F ).( ) 1. Role play and improvisation are social interaction activities.( ) 2. Discovering missing information and discovering differences and following directions are all functional communicative activities.( ) 3. Stress in pronunciation is sometimes as important as grammar.( ) 4. Students need to be able to write phonetic transcripts of words.( ) 5. Adult learners need to focus on pronunciation, but young learners don’t.( ) 6. Students need to know phonetics in order to learn English.( ) 7. Students need to be given detailed grammar rules if they are to learn a foreign language successfully.( ) 8. If the students get enough chance to practise using a foreign language, they do not need to learn grammar.( ) 9. Teaching and learning grammar should focus on practice rather than the study of grammar itself.( ) 10. Grammar should be taught an practised in context.( ) 11. The best way to explain vocabulary is to translate.( ) 12. Words must be learned in language contexts.( ) 13. Knowing a word means that you know the pronunciation and meaning of it.( ) 14. Students’ errors are a very useful way of showing what they have and have not lear nt. So instead of seeing errors negatively, as a sign of failure, we see them positively as an indication of what we stillneed to teach.( ) 15. Testing implies evaluation based on a collection of information about what students know and can do.( ) 16. Classroom climate is strongly affected by the teachers’ attitude and behaviour.( ) 17. In the Communicative Approach, a teacher is described as an “instructor” and students as “listeners” in class.( ) 18. The students’ native language has no particular role in the Communicative Approach. The target language should be used not only during communicative activities, but also in explaining theactivities to the students or in assigning homework.( ) 19. Words which we want students to understand, but which they will not need to use themselves. We call this passive vocabulary.( ) 20. Students’ errors are a sign of failure, so we must correct every mistake they make.( ) 21. Culture is received greater attention in the Communicative Approach.( ) 22. Spoken language is generally produced in informal, simple or commonvocabulary.() 23. All new words in a lesson are equally important.( ) 24.Classroom climate is strongly affected by both the teachers’ attitude and the students’ behavior.( ) 25. V ocabulary can be divided into productive and receptive.( ) 26. Communicative competence refers to knowledge of the grammar and vocabulary of the language.( ) 27. Post-reading work usually contributes to the development of all the language skills and may involve using other skills than just reading.( ) 28. Written language is generally produced in fairly simple sentence structures.( ) 29. In the Communicative Approach, both teachers and students have multiple roles.( ) 30. Spoken language is sometimes produced in incomplete sentences.( )31. The skill practised in the pre-reading stage is anticipation.( ) 32. Communicative activities can be divided into functional communicative activities and social interaction activities.( ) 33. One way to teach reading is following the framework: presentation, practice and production. Each stage has a different goal and deals with different reading strategies.( ) 34. Students are given the structure in context and are asked to work out the rule for themselves. They are given guidance from the teacher in using evidence from the context to work out the usage of thestructure. This is called the inductive method.( ) 35. Reading is an active process, during which the reader tries to understand the meaning of a given text.( )36. If the aim of activity is to check that students can use the verbs correctly, you have to correct any major errors, especially those involving the verbs you have taught, or the activity will lose its point. ( ) 37. The skill practised in the pre-reading stage is inference.( ) 38. Words which we want students to understand, but which they will not need to use themselves. We call this active vocabulary.( ) 39. The typical example of functional communication activities is role play.( ) 40. The target language should be used not only during communicative activities, but also in explaining the activities to the students or in assigning homework.( ) 41. You glance quickly through a text in order to find a specific piece of information, this skill is called scanning.( ) 42. Types of mistakes are slips, errors and attempts.( ) 43. The language you are learning is called target language.( ) 44. There is an important difference between assessment and testing.( ) 45. In many cases the term “materials” is used in place of “textbooks”, which refers to anything that is used by teachers or students to facilitate the learning of a language.( ) 46. It’s unnecessary for teachers to know how to evaluate, select and adapt textbooks.( ) 47. It is clearly whether someone can become a good language teacher solely depends on his/her command of the language.( ) 48. Foreign Language Teaching Methodology is a science which studies the processes and patterns of foreign language teaching, aiming at revealing the nature and laws of foreign language teaching.( ) 49. According to the Grammar Translation Methods, the spoken form of language is the most important aspect of language.( ) 50. Interactional view sees language as a linguistic system but also as a means for doing things.( ) 51. Functional view considers language as a communicative tool, whose main use is to build up and maintain social relations between people.( ) 52. Students are given the opportunities to use the newly presented language items in a controlled framework. This may be done by drills, or by repeating parts of the dialogue presented in the firststage. This stage is intended to develop accuracy skills. This describes the presentation stage. ( ) 53. When reading a text, I start by predicting the probable meaning, then I get to read and understand the words and phrases in the text to check whether that is really what the writer means. SometimesI go the other way round. That’s to say, I combine the above 2 ways in my reading. This is theinteractive model.( ) 54. Learners have the opportunity to integrate the new language items with the old through activities that give free and extensive expression aimed at developing fluency skills. This refers to theproduction stage.( ) 55. I usually start reading a text by recognising words, word connections, and phrase patterns as well as sentence patterns, then I can rapidly and automatically get meaning from the text. This is thetop-down model.( ) 56. When reading a text, I first identify the topic, purpose and structure of the text, then I make guesses, predictions during reading. In this way, I create meaning from the text as a whole. This is thebottom-up model.( ) 57. Structural view sees language as a linguistic system made up of various subsystems. To learn a language means to learn these structural items so as to be able to understand and produce language.( ) 58. 语言技能包括听、说、读、写四个方面的技能以及四种技能的综合运用能力。
农学概论重点
第一章农业:是采取各种措施,调控农业生物生命活动进程,以充分利用自然资源和社会资源,来获取人类生活所需产品的各种活动和各个部门的总称。
农业概论是研究农作物高产、优质、高效、安全、持续生产的理论与技术的科学。
农业生产的特点1.土壤的基础性2.地域性3.季节性4.连续性第二章Two ways of classification:自然分类法,人为分类法。
作物:对人类有用、由人类栽培的植物.发芽出苗所需条件:内因有生命力充分成熟完成休眠Function of root system作用:固定,吸收,合成,运输,储存,分泌。
Function of leaf作用:光合,蒸腾,吸收leaf is consisted of three parts:表皮叶肉叶脉Requirement for floral bud formation条件:营养,春化,光周期第三章生态因子作用方式:主要、次要作用,相互作用,直接作用,间接作用,作用时期。
Law of the minimum factor—crop growth is restricted by the minimum factor which is also called limiting factor.最小因子律Reward reduction law—the reward from a certain piece of land will increase as the increase of input to the land, whereas, the increasing degree will reduce as the increase of unit capital and work.报酬递减律Tolerance law—either too much or too little of the ecologic factor quantity will hinder the growth of crop, therefore there is a range to a certain crop for a certain factor, and the range is the tolerant scope of the crop to the factor.耐受律:同一作物对不同生态因子耐受范围不同,不同作物对同一生态因子耐受范围不同;同一作物不同生育时期对同一生态因子耐受范围不同;一个因子超出适宜范围会导致作物对另一个因子的耐受范围便窄;对主要生态因子适应范围较宽的作物分布范围较大;如果一种作物的不同品种种植在不同生态地区,这一作物就会形成不同生态类型。
第11章 FACTS技术及电力电子电器
二、静止调相器
三 、串补限流器
串补限流器
四、FACTS电器与传统机械式电器 的比较
优点主要有:
1. 动作速度快。机械触点开关的动作时间一般月几十毫秒, 而电力电子开关的动作时间一般仅需几十微秒。 2. 操作频率高,每分钟可动作100次以上。 3. 寿命高,仅有电老化问题而无机械寿命,而后者正是机械 式开关的寿命极限。 4. 无触点和外部放电,可在有机械振动、粉尘和有危险气体 中工作。 5. 操纵功率小,如MOS场效应关的控制几乎不取用信号电流。 6. 可实现模块化,提高质量和可靠性,降低成本。 7.便于实现数字化和智能化。 8. 可实现可控阻抗变换,连续可调,这对于两位式开关是根 本不可能的。
电力电子开关的弱点
1. 电力电子开关的总体价格比相应的传统开关高许多。 2. 电力电子开关在导通后有管压降,因此有一定的功 率损耗,为了散热往往加有大面积的散热体,从而 使开关的体积往往比同容量的有触点电器大许多。 3. 电力电子开关在关断后存在漏电流,不能实现理想 的电隔离。 4. 过载能力低,受工作温度的影响较大,抗干扰能力 较差。 5. 电子电器工作时产生许多谐波分量,是电力系统的 一个谐波污染源。
二、现代电力系统面临的困难
1. 2. 3. 4. 5.
电力系统潮流的实时控制 短路电流水平的配合 电力系统的稳定性问题 电力系统的控制速度 系统电压和无功功率的控制
一般称系统中有规律波动的功率流动为潮流
三、电力电子技术的发展
四、电力电子技术对电力系统的影响
1.对输电方式的影响 21世纪将呈现交流、直流两种输电方式 并肩协调运行的良好局面。
各种FACTS控制器
带串补偿的故障电流限制器原理结构图
Unit 4 Computer facts知识点及练习题
Unit 4 Computer facts知识点及练习题Chapter 2Computer一.基础篇(一)核心单词1.important a. 重要的importance n. 重要性2.necessary a. 必要的need v. aux. 必须3.happy a. 快乐的,幸福的happily adv. 幸福地4.plan—planned,v. 计划plan n. 计划5.hide (hid, hidden) V. 隐藏6.break (broke, broken) V. 打破,违犯freeze (froze, frozen) V. 使结冰,使冷冻7.calculator n. 计算器8.operate v. 动手术How do you operate this new machine ?operation n.手术9.electric a. 电的electric light 电灯electricity n. 电electronic adj. 电子的10.weigh v. 称……的重量weigh sth for sb.The watch weighs 0.45 kg.weight n. 重量11.agree v. 同意12.What does Joyce think of Sichuan food? 觉得……怎么样?--- How does Joyce like Sichuan food?比较:What does the thief look like? 某人长什么样?How does the thief look?13.taste n. 味道,味觉taste v. 品尝The dish tastes good.He tasted the dish and found it was quite tasty.14. copy n. . 副本,拷贝v. 抄写a copy of the questions ;a copy of Shanghai Students’PostI copied the text twice yesterday.15.history n. 历史historical adj. 历史的16.develop v. 发展development n.17.difficult a.困难的difficulty n. 困难18.businessman n.. 女商人businesswoman n. 男商人busy a. 忙的business n. 生意business hours / letters19. possible a. 可能的impossible a.不可能的possiblyadv. 可能地20.like v. 喜欢dislike v. 不喜欢21.honest a. 诚实的honesty n. 诚实dishonest a. 不诚实的22.length n. 长度long a. 长的height n. 高度high a. 高的weight n. 重量wide a. 宽的,宽阔的23. mouse n. 老鼠鼠标24. knowledge n. 知识know v. 知道,认识25. type n.类型v. 打字26.print v. 打印印刷27.judge n. 法官v. 判断审判28.thus adv. 如此;这样;因而29.几组反意词fast --- slow, high --- low, heavy --- light, flat --- rough(二)词组1. plan to do sth. 计划做某事I plan to study abroad next year.(v.)2. operate on sb. 为某人开刀3. give a computer instructions by putting a program into it.通过往计算机中输入程序来给计算机指令by doing sth 通过干。
电气工程基础课件思考题自己整理篇
第一部分第一章1.电力系统由哪几部分构成?现代电力系统的特点是什么?电力系统是由发电、变电、输电、配电、用电等设备和相应的辅助系统,按规定的技术和经济要求组成的一个统一系统。
一个现代电力系统是由极宽阔的地域内的大量电力设备互联在一起的。
现代电力系统的特点☐发展是以“大机组、大电网、高电压、高度自动化”为特征来描述;☐数字化、网络化、信息化、智能化技术日益提高电力系统的自动化水平;☐洁净煤技术、水电开发、核电的发展越来越得到重视,新能源的开发利用☐建立健全的电力市场机制是提高效率、降低成本,促进电力资产的合理利用与发展的有效保证。
课件:现代电力系统应该是一个电力、现代发配电设备、计算机、信息技术和各种用户综合的系统工程,它要求电力系统容量更大、传输距离更远、电压更高、网络更复杂、开关调度更灵活、计量更准确,同时还要求电力系统降低损耗、节能和防止环境污染等。
(前言里说:目前我国已基本进入大电网、大电厂、大机组、高压输电、高度自动控制的新时代。
)2.你认为还有哪些能源可以用于发电?答:如太阳能、风力、地热、潮汐等用的比较多,未来还将有采用海水盐度差温度差、地下高温岩体、高炉顶压、生物质能、垃圾、污泥、磁流体、燃料电池等系列新能源进行发电的。
3.电力市场的基本原则是什么?答:1. 电力市场要有公开性,以便监督。
2. 扩大自由选择权利,保证电网的开放3. 必须建设有关法律法规、标准、规约、使竞争规范化。
4.柔性交流输电技术的作用是什么?●柔性交流输配电技术,简称FACTS技术,它是在交流输电系统的主要部位,采用具有专门功能的电力电子器件和现代自动控制装置或组合体,对输电系统的运行状态变量和参数,如电压、相位差和电抗等以至网络结构进行调控,从而实时、灵活、快速的控制交流输电功率,以【大幅度提高现有高压输电线路的输送能力,实现电功率的合理分配,降低功率损耗及发电成本,提高系统稳定运行的水平与可靠性】。
5.在中性点不接地三相系统中,发生单相接地故障时,各种电压和电流是如何变化的?请画出向量图。
电力系统分析基础思考题和计算题090519
第一章电力系统的基本概念一、思考题1.请说明火力发电的能量转换过程。
2.电力系统中除火电、水电及核电以外的其它发电形式一般称为“新能源”,你能说出几种新能源发电形式?3.火力发电使用的一次能源都有哪些?4.负荷成分主要是什么?5.电力系统包括哪些主要组成部分?分别起哪些作用?6.什么是电力网?什么是动力系统?7.电力系统常用的结线图有几种?8.电力系统生产的特点是什么?9.对电力系统运行的基本要求是什么?10.电能质量的主要指标是什么?11.考核电力系统运行经济性的指标是什么?12.什么是“有备用结线”?什么是“无备用结线”?各有几种形式?13.我国电力系统3kV以上的额定电压等级是什么?14.我国电力系统中性点的运行方式是什么?15.什么是“消弧线圈”?作用原理是什么?16.升压变和降压变的变比有何区别?17.我国三峡电站装设台水轮发电机组,每台额定容量为MW。
18.什么是线路的经济输送功率和输送距离?19.什么是“黑启动”?20.*什么是“能量管理系统(EMS)”?21.*你对电力市场了解多少?22.*什么是高压直流(HVDC)输电系统?与交流输电相比有哪些优缺点?23.*什么是灵活交流输电系统(FACTS)?二、计算题1.在括号中给出下面各变压器的额定电压。
2.在括号中给出下面各变压器的额定电压。
第二章电力系统各元件的特性和数学模型一、思考题1.“数学模型”的含义是什么?2.什么是发电机的“运行极限图(功率圆图)”?3.什么是发电机“进相运行”?4.什么是变压器的铜耗和铁耗?5.为什么说变压器的铜耗是可变损耗?铁耗是不变损耗?6.升压三绕组变压器三个绕组由内到外的排列顺序是:中、低、高;降压三绕组变压器三个绕组由内到外的排列顺序是:低、中、高,为什么?7.采用扩径导线或分裂导线的主要目的是什么?8.220kV和500kV线路上每串绝缘子的片数一般为多少?9.铝线和铜线的电阻率是多少?10.架空输电线为什么要换位?何谓“完全换位”?11.架空输电线路的电抗一般为Ω/km左右。
语法知识—名词的难题汇编及解析
一、选择题1.In fact (事实上), she ________ ________ many ________.A.doesn’t has; toies B.don’t has; toies C.doesn’t have; toys D.don’t have; toys 2.— Do you know all the names in your class, Mr King?—No, only part of them.A.student B.students C.stu dent’s D.students’3.I’m hungry. I want some _________.A.water B.bread C.toys D.homework 4.There is a______ shop and two_______ shops not far away from my school.A.sports; shoe B.sports; shoesC.sport; shoe D.sport; shoes5.—What does your mother have for dinner?—A.Chickens and tomato B.Chicken and tomatoes.C.Chicken and tomato.6.—There are beautiful flowers everywhere to celebrate the National Day, and we have—________ holiday. That means we have seven days ________ for this public holiday.A.a seven-day; off B.a seven-days; awayC.seven-day; over D.a seven-days’; off7.—Tom likes soccer.What club can he join?—He can join the ______ club.A.sport B.musicC.sports D.swimming8.Good food and_______help her_______better.A.exercise; study B.exercise; studiesC.exercises; studying D.exercises; to study9.Look! The Chinese national basketball team ________ a face-to-face interview with their fans in the hall. How excited the fans are!A.is having B.are having C.have D.has 10.—Look.T here’re lots of______here.—Great.We can make______soup.A.egg;egg B.eggs;eggC.egg;eggs D.eggs;eggs11.—What can I do for you?—Err, I want a glass of milk, some bread and .A.some chickens B.any chicken C.some chicken12.________the________Mike’ s and Jack’s?A.Is, rooms B.Are, room C.Are, rooms D.Is, room13.My sister and I like eating two _______ and some _______ for dinner. They are reallydelicious.A.salad; eggs B.salads; eggs C.salad; eggs D.salads; egg 14.—These days, more and more kids have problems with their sight.— They should do eye________and take________every day.A.exercises; exercises B.exercises, exerciseC.exercise. exercises D.exercise, exercise15.— Is this room yours? —No, it's not__________.It's __________.A.mine; Lily's and Lucy's B.my; Lily and Lucy'sC.my; theirs D.mine; Sally's16.________ your reading speed, or you can’t finish the English reading materials in ________ limited time.A.Increase; 100 minutes’B.To increase; a 100-minute C.Increasing; 100-minutes’17.--What kind of noodles you like?--I’d like noodles.A.do;tomatoes B.would;tomato C.do;tomato D.would;tomatoes 18.(2017·甘肃白银、武威·7)“It depends on my ________ decision.” the mother said and looked at her two sons.A.children B.children's C.child D.child's 19.There are many ________ animals in the zoo. I like pandas best. Because they are ________ cute.A.kind of; kinds of B.kind of; kind of C.kinds of; kinds of D.kinds of; kind of 20.These aren’t.They’re my brother’s.A.pen;mine B.pens;mineC.pen;my D.pens;my21.Let’s wish the food festival .A.succeed B.success C.successful22.—What're these_______English?—They are________.A.at; knifes B.in; knives C.in, knifes23.Mary, please get some ________for me.A.orange B.pear C.tomato24.In fact, he didn’t explain the cause the accident us clearly.A.for; to B.of; to C.for; for D.of; for25.—It’s convenient(方便的) to travel from Suzhou to Shanghai by car?—Yes. It’s said that_________is enough.A.two hours drive B.two-hours driveC.two hour’s drive D.two hours’ drive【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【分析】【详解】句意:事实上,她没有很多玩具。
英语暑期培训思考题答案
初中英语复习思考题1. 依据巴特利特和鲁梅尔哈特的观点,图式分别代表什么?巴特利特认为:图式是人们赖以观察世界、理解世界的一种认知手段,可以用来解释人类的心理认知过程。
鲁梅尔哈特的观点,图式代表一种相互作用的知识结构,涵盖了词汇意义、复杂事件、意识形态等不同层面的知识网络,也就是指人们通过不同途径所积累的各种知识、经验等的集合。
2. 从鲁梅尔哈特的图式观点来看,学习过程是什么样的过程?在其图式理论柜架内有哪几种学习模式?学习过程,作为一个认知过程,既是对情境的反应,又是对记忆网络中似单元的激活,并使实际激活模式与新信息之间产生匹配、产生理解的过程。
因此可以说,学习过程就是认知结构不断变化和重新组织的过程。
在图式理论的框架内划分了三种主要的学习模式:1) 增生 (accretion);2) 调适 (tuning);3) 重建( reconstruction)。
3. 基于鲁梅尔哈特的学习模式,教学过程中应该重视什么?基于鲁梅尔哈特的学习模式,教学过程中应该重视的不是学生知识点的增加,而是学生的能动作用、学生认知能力的发展,因为在教学过程中,学生才是真正的主体。
4. 课堂教学的设计应该以什么为起点?应该以对学生的研究为起点5. 课堂教学的设计要突出什么、注意什么、强调什么?突出学生自主建构知识的必要性,要注意新知识和学生原有图式之间的相互关联性,强调培养学生自主吸纳,构建新知识的能力。
6. 课堂教学要尊重什么?尊重学生的自主参与和认知特点7. 学习者主动建构的结果是什么?新旧知识的匹配、组织和吸纳8. 知识来自于什么?知识来自于主体和客体的结合、互动9. 怎样才能进行有效的教学?不断根据学生的认知特点来调整教学内容,改变教学方法,重新建立促进学生建构个人理解的教学实践,帮助学生改变原有的知识图式,提升学生的认知能力。
10. 设计课堂教学前必须思考哪些问题?教师如何引导学生的认知获得过程、如何对学生的知识构建过程进行评价和调控教师如何创造有利于学生思考和探索的良好环境11. 在教学内容的安排和教学设计上要注意什么?在教学内容的安排上要注重各知识点之间的相互关联和融通,课堂教学的设计要有弹性,要为学生的思考和自主活动留出空间和时间,教师要引导学生通过对问题的反复思考,帮助学生在新的知识点和先前学过的知识之间建立联系,让学生对知识寻求深入的理解,自觉、自主地建构良好的认知结构。
2014电力系统分析稳态复习思考题
1、电力系统各类元件的额定电压与电力网的额定电压有什么关系?*发电机的额定电压与系统的额定电压为同一等级时,发电机的额定电压规定比系统的额定电压高5 %*电力线路和系统的额定电压相等,称为网络的额定电压*根据T的功率传输方向,规定T接受功率侧的绕组为一次绕组,输出功率侧的绕组为二次绕组。
一次绕组相当于受电设备时,变压器额定电压与系统的额定电压相等,但直接与发电机联接时,其额定电压则与发电机的额定电压相等。
二次绕组的作用相当于供电设备,考虑其内部电压损耗,额定电压规定比系统的额定电压高10% ,如果变压器的短路电压小于7%或直接(包括通过短距离线路)与用户联接时,则规定比系统的额定电压高5%。
分接头的额定电压规定为:主抽头额定电压加上主抽头额定电压乘以分接头档位。
例如对于+5%抽头,升压变压器为242+0.05*242=254.1kV对于-5%抽头,升压变压器为242-0.05×242=229.9kV,同样对于+5%抽头,降压变压器则为220+0.05*220=231kV同样对于-5%抽头,降压变压器则为220-0.05*220=209kV第二章1、架空线路的导线换位有什么作用?当三相导线排列不对称时,各相导线所交链的磁链及各相等值电感便不相同,这将引起三相参数不对称。
利用导线换位可使各相平均电感接近相等。
2、分裂导线对线路的电感电容参数各有什么影响?分裂导线的作用:1)减小输电线电感参数L0;2)增大导线的等值半径防止和减小电晕损耗;3)增大输电线电容参数C03、试绘制电力网计算中常采用的双绕组变压器和三绕组变压器的等值电路。
双绕组变压器的单相等值电路接线图三绕组变压器的单相等值电路接线图8、试列写变压器短路试验和开路试验的所得的4个参数,写出用这些参数计算变压器漏电阻、漏电抗;励磁电导和励磁电纳的计算公式并说明公式中变量的单位。
变压器铭牌上的四个数据:短路损耗△Ps,短路电压Vs %,空载损耗△P0,空载电流I0%。
初中英语语法知识—名词的知识点总复习有答案解析(5)
一、选择题1.In fact (事实上), she ________ ________ many ________.A.doesn’t has; toies B.don’t has; toies C.doesn’t have; toys D.don’t have; toys 2.________wild animals are disappearing because of the ________of their living areas. A.The number of; lost B.The number of; losing C.A number of; loseD.A number of; loss3.-Can I help you?-Yes. I'd like__________ rice.A.a small bar of B.a slice of C.a large bag of D.a piece of 4.— Do you know all the names in your class, Mr King?—No, only part of them.A.student B.students C.student’s D.students’5.—Let’s make a banana milk shake.—How many ________ do we need?A.bananas B.cup of milk C.honey6.There are two________ near our school.A.shoe shops B.shoes shops C.shoe's shops D.shoes' shops 7.---- _________ is it from Nanjing to Beijing?--- It’s less than three ___________ flight.A.How long, hour’s B.How far, hour’sC.How long, hours’D.How far, hours’8.—What does your mother have for dinner?—A.Chickens and tomato B.Chicken and tomatoes.C.Chicken and tomato.9.—Kate, I will go to the Guangzhou Zoo next week, because I will have a ________ holiday —You mean you can have ________ off? Oh, that’s great!A.three-day; three days B.three- day; three days’C.three days’; three-day D.three days; three days10.— How much are the __________?— Eight yuan a kilo.A.broccoli B.potatoes C.beef D.bread11.The computer is _______________.A.Amy's and Lily's B.Amy and Lily C.Amy's and Lily D.Amy and Lily's 12.________the________Mike’ s and Jac k’s?A.Is, rooms B.Are, room C.Are, rooms D.Is, room 13.My sister and I like eating two _______ and some _______ for dinner. They are really delicious.A.salad; eggs B.salads; eggs C.salad; eggs D.salads; egg14.—These days, more and more kids have problems with their sight.— They should do eye________and take________every day.A.exercises; exercises B.exercises, exerciseC.exercise. exercises D.exercise, exercise15.It's about ten __________ walk from here.A.minutes' B.minute's C.minutes D.minute of16.I guess __________bikes are yellow. They have many things in the same color.A.Lucy's and Lily's B.Lucy and Lily's C.Lucy and Lily D.Lucy's and Lily 17.I share my room ______ a friend of _________.A.to, me B.with, mine C.with, me D.from, mine 18.________ your reading speed, or you can’t finish the English reading materials in ________ limited time.A.Increase; 100 minutes’B.To increase; a 100-minute C.Increasing; 100-minutes’19.—Is that your schoolbag?—No, it isn’t. It’s _____.A.her. B.Bob’s C.Bob D.him20.These aren’t.They’re my brother’s.A.pen;mine B.pens;mineC.pen;my D.pens;my21.A number of________ will take part in the sports meeting and the number of them________ over 300.A.students; are B.student; are C.students; is22.________mothers work in the same hospital.A.Tim’s and Peter’s B.Tim’s and Peter C.Tim and Peter’s D.Tim and Peter 23.He has over 20 years teaching ________. I bet he is quite________.A.experience; experience B.experience; experienced C.experienced; experience D.experienced; experienced24.In fact, he didn’t explain the cause the accident us clearly.A.for; to B.of; to C.for; for D.of; for 25.Thanks for the two _______________you gave(给)to me.A.tape player B.tapes players C.tape players D.taper players【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【分析】【详解】句意:事实上,她没有很多玩具。
《如何制定单元教学目标和课时教学目标》的思考题
试解释布卢姆的教学目标分类与加涅的分类的区别与联系,结合我国的教学目标分类,作比较研究89号虹口区青少年活动中心吕玥倩一、布鲁姆的教学目标分类方法布卢姆提出的教学目标分类理论中,将教学活动所要实现的整体目标分为:认知、动作技能、情感三大领域,并从实现各个领域的最终目标出发,确定了一系列的目标序列,其中认知领域的目标分类最为大家所熟悉。
布卢姆将认知领域的教学目标分为知道、理解、运用、分析、综合和评价六个层次。
1.知道:对先前学习过的知识材料的回忆,包括具体事实、方法、过程、理论等的回忆。
例如,能够叙述牛顿三大定律。
2.理解:把握知识材料意义的能力。
可借助三种形式来表明:一是转换,即用自己的话或用与原先表达方式不同的方式来表达所学的内容。
例如,说出一个词的同义词或近义词、对一个抽象概念举例、古文或外文的翻译等。
二是解释,即对一项信息(如图表、数据等)加以说明或3.概括:例如,对数学公式含义的说明、对文章大意的概括等。
三是推断,即预测发展的趋势。
例如,让学生判断放在光滑水平面上的小球受到一个推力作用时将如何运动等。
4.运用:把学到的知识应用于新的情境。
例如,运用运算法则解题、运用所学的电学知识安装电路电灯、法语教学中运用造词法写出一个单词不同词性的系列词汇等。
5.分析:把复杂的整体材料分解为组成部分,并理解各部分之间的联系的能力。
例如,分析数学定理所给出的条件和结论、外语中复合句的构成成分、记叙文构成要素分析等。
6.综合:将所学知识的各部分重新组合,形成一个新的知识整体。
例如,通过一系列的实验观察,引导学生归纳出自由落体运动的规律和公式;外语教学中,引导学生通过所学的词汇归纳造词法等。
7.评价:对材料(如论文、小说、诗歌、研究报告等)做价值判断的能力。
例如,能判断自己所证明的几何题目的正确性。
二、加涅的教学目标分类方法1.智慧技能:是使符号应用成为可能的习得性能。
是人类习得的最为重要的性能类型,因而也是受教育的实质意义所在。
Unit4Computerfacts知识点及练习题
Unit 4 puter fats知识点及练习题hapter2puter一.基础篇(一)核心单词.iprtanta重要的iprtanen重要性2.neessara必要的needvaux必需3.happa欢乐的,幸福的happiladv幸福地4.plan—planned,v打算plann打算.hideV隐藏6.breaV打破,违犯freezeV使结冰,使冷冻7.alulatrn计算器8.peratev动手术Hduperatethisneahine? peratinn手术9.eletria电的eletrilight电灯eletriitn电eletrniad电子的0.eighv称……的重量eighsthfrsb Theatheighs04g eightn重量1.agreev同意2hatdesethinfSihuanfd?感觉……怎么样?---HdeselieSihuanfd?比较:hatdesthethiefllie?某人长什么样?Hdesthethiefl?3tasten味道,味觉tastev品尝Thedishtastesgd Hetastedthedishandfunditasquitetast4pn副本,拷贝v抄写apfthequestins;apfShanghaiStudents’Pst Ipiedthetexttieesterdahistrn历史histrialad历史的6develpv进展develpentn7diffiulta困难的diffiultn困难8businessann女商人businessann男商人busa忙的businessn生意businesshurs/letters9pssiblea可能的ipssiblea不可能的pssibladv可能地20liev喜爱disliev不喜爱21hnesta老实的hnestn老实dishnesta不老实的22lengthn长度lnga长的heightn高度higha高的eightn重量idea宽的,宽敞的23usen老鼠鼠标24nledgen知识nv明白,熟悉2tpen类型v打字26.printv打印印刷27.udgen法官v判定审判28.thusadv如此;如此;因此29几组反意词fast---sl,high---l,heav---light,flat---rugh(二)词组plantdsth打算做某事Iplantstudabradnextear2peratensb为某人开刀3giveaputerinstrutinsbputtingaprgraintit通过往运算机中输入程序来给运算机指令bdingsth通过干。
语法思考题参考答案(精)
语法思考题参考答案第一节1、语法的广义和狭义、主观性和客观性各表现在哪些方面?“语法”这个术语,实际上有两个方面的四种含义。
首先,语法是语言的结构规律,是存在于语言深层的客观规律和变化规则。
这种规律是不以人们的主观意志为转移的,它随着语言的产生而产生,发展而发展。
其次,语法又可以指语法学和语法书。
语法学是研究语言结构规律的科学,是人们对客观的语法规律的主观认识和说明。
语法书是语法研究成果的记录,因而也属于语法学的范围。
比较而言,上述前一种含义具有客观性,后一种含义具有主观性。
两者的关系是,客观的现象、规律是基础,主观认识必须以客观事实作为依据;主观的认识是一门科学,客观事实必须通过主观活动而得到提炼、归纳和整理。
此外,国外有人将语法用在更大的范围上,认为语法就是语言的法则和规律;语法不但包括词语的结构关系和变化规律,而且还包括语音、词汇的结构关系和变化规则,这就是广义的语法。
同样,广义的语法也可以分为客观和主观两个方面。
在广义语法中,一般所说的语法,即狭义的语法被叫做句法;而狭义语法中的句法仅仅是同词法相对的短语和句子的结构规则和变化规律。
2、从研究方法、理论背景和研究对象这三个角度着眼,语法学应该怎样分类?从研究者采用的方法看,语法可以分为比较语法和描写语法。
比较语法又称历史比较语法,主要指的是亲属关系语言之间的比较,尤其是比较印欧语系内部各亲属语言之间的关系。
描写语法重在研究某一语言在发展过程中一定时期的语法构造,主要是对语言体系作断面的、静态的客观描写。
描写语法通过详尽仔细的描写和分析,把人们实际使用的语言的语法构造非常清楚地刻画了出来。
2、从研究者的理论背景看,有传统语法、结构主义语法和转换生成语法等。
传统语法主要指十八世纪以来直到当前中学教科书中所使用的一些术语、概念、规则和理论。
结构主义语法强调语言结构中成分之间的对应关系,重视语法体系的系统性和严密性,对于语法单位的分类主张以形式标志和功能分布为依据,反对从意义出发。
初中英语语法知识—名词的技巧及练习题附答案解析(5)
一、选择题1.In fact (事实上), she ________ ________ many ________.A.doesn’t has; toies B.don’t has; toies C.doesn’t have; toys D.don’t have; toys 2.—Let’s make a banana milk shake.—How many ________ do we need?A.bananas B.cup of milk C.honey3.There are two________ near our school.A.shoe shops B.shoes shops C.shoe's shops D.shoes' shops 4.Those _________ plans for the holiday sound great. How about ________?A.girl’s ; yours B.girls’; youC.girls ; your D.girls’; yours5.There________some water in the bottle.A.is B.am C.are D.be6.Good food and_______help her_______better.A.exercise; study B.exercise; studiesC.exercises; studying D.exercises; to study7.Here_______some of the results. Most students think_______are cheaper than cars. A.is; the bike B.are; bikesC.are; the bike D.is; bikes8.—Look.There’re lots of______here.—Great.We can make______soup.A.egg;egg B.eggs;eggC.egg;eggs D.eggs;eggs9.—What can I do for you?—Err, I want a glass of milk, some bread and .A.some chickens B.any chicken C.some chicken 10.— How much are the __________?— Eight yuan a kilo.A.broccoli B.potatoes C.beef D.bread 11.—Could you please give me ____? —Certainly.A.some advices B.any advicesC.some advice D.advices12.Alan usually goes to Harbin in .He likes playing with snow.A.May B.July C.September D.November 13.I am hungry. But there is little left. I have to go and buy some.A.sandwiches B.potatoes C.water D.bread 14.—Whose desk is it? Is it the ________?—Yes. It is ________.A.twins'; Liz's and Lillie's B.twin's; Liz's and Lillie'sC.twins'; Liz and Lillie's D.twin's; Liz and Lillie's15.It's about ten __________ walk from here.A.minutes' B.minute's C.minutes D.minute of16.I guess __________bikes are yellow. They have many things in the same color.A.Lucy's and Lily's B.Lucy and Lily's C.Lucy and Lily D.Lucy's and Lily 17.—_________ is it from Wuxi to Shanghai?—It’s about ________ drive.A.How long; a two hours’B.How far; a two-hoursC.How far; two hours’D.How long; a two-hour18.— How _______ is it from Xi'an to Dunhuang? — It's less than 3 _______ flight. A.long; hour's B.far; hour's C.long; hours' D.far, hours' 19.— Is this room yours? —No, it's not__________.It's __________.A.mine; Lily's and Lucy's B.my; Lily and Lucy'sC.my; theirs D.mine; Sally's20.________ your reading speed, or you can’t finish the English reading materials in ________ limited time.A.Increase; 100 minutes’B.To increase; a 100-minute C.Increasing; 100-minutes’21.Some bananas ______ in the bag. Some mutton ______ on the table.A.are; are B.is; is C.are; is D.is; are 22.Animals are our ________, and we should be ________ to them.A.friend; friendly B.friends; friendly C.friendly; friends D.friendly; friend 23.—_______everyone with kindness even those who are impolite to you. Remember: not because they are worth it, but because you are nice.一Everyone should treat others with_______.A.To treat; warmly B.Treat; warmth C.Treating; warm24.This zebra is an ______ animal. It lives in ______ now.A.Africa; Africa B.African; AfricaC.Africa; African D.African; African25.My sister and I like eating two _______ and some _______ for dinner. They are really delicious.A.salad; eggs B.salads; eggs C.salad; eggs D.salads; egg【参考答案】***试卷处理标记,请不要删除一、选择题1.C解析:C【解析】【分析】【详解】句意:事实上,她没有很多玩具。
精通版小学英语五年级下册Unit2_Fun_Facts知识点总结教案
精通版小学英语五年级学习单词,背诵课文,基础知识很重要!精通版小学英语和你一起共同进步学业有成!Unit2 Fun Facts 教学设计一、教学内容与分析Reading for knowledge本部分以阅读形式介绍了两段世界上的专卖店,使学生对本单元所学的购物话题得到更好的拓展和延伸。
通过学习,学生能够读并理解短文,并且根据短文内容完成任务,回答问题。
同时,渗透阅读策略,提高阅读技巧,培养学生的自主学习能力。
二、课前准备1. 准备一些有关特殊商店或专卖店的视频资源,准备上课播放。
2. 准备词语卡片,进行复习。
3. 准备教学课件。
三、初学步骤与建议1) 师生问好。
2) 自由交谈。
围绕本单元重点句型进行问答,结合学生实际生活。
3) 播放一些有关特殊商店或专卖店的视频,激活学生思维和交流表达的欲望。
明确本课的主题Special shops in the world。
Step 2: Presentation1) 呈现第一段短文呈现茶艺的图片,提问问题,引发学生思考:What is it? What do you know about it? What do you want to know about it? 教师梳理交流学生的反馈内容,借助图片或视频介绍短文第一段,学生感知理解。
2) 阅读文章,处理核心内容教师播放视频,让学生带着问题看:What color is a cup of green tea / black tea? 教师将关键信息及时板书,例如a pot of tea。
3) 指导学生默读短文,再次理解短文,尝试认读复述。
4) 呈现第二段短文通过问答的方式自然过渡到第二段:Is it tea? No. They’re chocolates. Do you like chocolates? 然后引导学生通过阅读获取信息,教师提出问题:Who wants to buy the chocolates? Why does she want to buy it? What is she interested in? What does奖励同学一些有意思的网址网站信息,激发学生兴趣,同时也作为课外延伸的作业,查询相关信息并介绍给大家。
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电流互感器只能一点接地
电流互感器两点接地的危害
(1)电流二次回路是通过电缆连接的,当接地网上出现短路电流或雷击电流时,由于电缆屏蔽层两点的电位不同,使屏蔽层内流过电流,可能烧毁屏蔽层。
当屏蔽层内流过电流时,对每个芯线将产生干扰信号。
(2)在电流二次回路中,假如正好在继电器电流线圈的两侧都有接地点,一方面两点接地点和地所构成的并联回路,会短路电流线圈,使通过电流线圈的电流大为减少。
此外,在发生接地故障时,两接地点间将因地网通过零序电流而产生地电位差,将在电流线圈中产生极大的额外电流。
这两种原因,将使通过继电器电流线圈的电流与电流互感器二次通入的故障电流有极大差异,会引起保护的不正确动作,同时会引起计量的不准确。
开关开距:动触头从分闸位置到刚合位置之间的距离(测合闸速度时得到此数据)
开关超行程:动触头从动作开始到刚分闸位置之间的距离(测分闸速度时得到此数据)。
慢分闸原因,危害及如何防止:压力不够啊,导致慢分闸,通常有开关有重合闸压力闭锁,压力低闭锁接点,就是防止慢分闸的,危害是,慢分闸造成拉弧时间长,烧坏触头,切除故障慢造成越级跳闸,油快速蒸发膨胀导致开关爆炸。
在某些断路器的断口上为什么要设并联电阻?其作用是什么:
在断路器断口上设并联电阻的目的是:
(1)使多断口断路器的各断口电压分布均衡。
(2)抑制暂态恢复电压。
(3)抑制感性电流开断所产生的过电压。
(4)降低开断电容电路时的过电压。
(5)抑制线路合闸过电压。
通常,并联电阻的阻值不同,所起的作用也不同。
并联电阻的阻值大致可分为低值(几欧到几十欧)、中值(数百欧到几千欧)和高值(数万欧)三种。
低值并联电阻主要用以降低或抑制暂态恢复电压,即降低开断过程中的恢复电压幅值及其上升率。
中值并联电阻主要用以限制和降低各种操作过电压。
高值并联电阻主要用以均衡多断口断路器断口间的电压分布。
什么是零序保护?大短路电流接地系统中为什么要单独装设零序保护?
在大短路电流接地系统中发生接地故障后,就有零序电流、零序电压和零序功率出现,利用这些电量构成保护接地短路的继电保护装置统称为零序保护。
三相星形接线的过电流保护虽然也能保护接地短路,但其灵敏度较低,保护时限较长。
采用零序保护就可克服此不足,这是因为:①系统正常运行和发生相间短路时,不会出现零序电流和零序电压,因此零序保护的动作电流可以整定得较小,这有利于提高其灵敏度;②丫,d接线降压变压器,△侧以后的故障不会在Y侧反映出零序电流,所以零序保护的动作时限可以不必与该种变压器以后的线路保护相配合而取较短的动作时限。
继电器与接触器的区别是什么?
继电器是作为一个放大信号工作电流的,以驱动较大的负载(二次回路)。
.接触器是直接用来控制较大电流的。
(主回路)
交流接触器一般有主触点和辅助触点之分,主触点是用来接通和断开低压电气设备主电源回路中的,相对来说触点容量较大。
而辅助触点则是用在控制回路中,有常开和常闭之分,由于控制回路中的电流相对要小,因此相对于主触点来说其容量要小许多。
而继电器则只应用在控制回路和保护回路中,但可以在回路中实现用小电流、低电压来控制大电流、高电压设备的功能,在接点容量和数量不足时还能起到扩容的作用。
工作原理:接触器的线圈是接于低压设备的控制回路中,当线圈两端电压达到额定值的70%以上时,使铁心磁饱和吸合衔铁,同时带动其主触点接通主电源至电气设备,当接触器的线圈失电后衔铁释放,主触点断开切断设备主电源。
继电器的线圈根据直流、交流、电流、电压的不同接于相应的回路中,当满足线圈吸合的条件时,吸合衔铁,带动其常开常闭接点相应动作,在回路中起到不同的作用。