《大学英语》复习资料
PartⅠ
1.He _____a child from drowning and was given a medal as a reward.
A. restricted
B. restrained
C. rescued
D. reserved
2. Judges must be firm, fair and ______in their application of the law.
A. consistent
B. resistant
C. assistant
D. insistent
3. As a family, we want to ______the tranditions of Tewish culture and religion.
A. reserve
B. resume
C. preserve
D. protect
4. You shouldn’t go swimming until your food has had a chance to_______.
A. digest
B. swallow
C. melt
D. disappear
5. The Chinese were a ________civilized people long before Europeans were.
A. greatly
B. highly
C. mostly
D. largely
6. The museum is of great interest, both to experts and to ______visitors.
A. strange
B. normal
C. casual
D. common
7. Problems often _______when you least expect them.
A. arouse
B. raise
C. rise
D. arise
8. You will find your books among ______on the shelf. (I)
9. She ______play the piano when she was only six. (can)
10. Brazil won _______World Cup in 2002.
11. If you don’t like this, I will show _______.
12. ________there is air all around us, we can’t see it.
13. We have to admit that he is a ________competent man. (high)
14. We received your telegram and were ________. (delight)
Part Ⅱ Translation (15%)
15. These include the supply of natural resources, the possible negative effects of industry on the
natural environment, and the continuing increase in the wor ld’s population.
16. If they can sense colour differences then perhaps we, too, are affected by colour
unconsciously.
17. In 1870, horses and mules were the prime source of power on U.S. farms.
Part Ⅲ Cloze (20%)
The past 20 years have seen enormous changes in the lives and ___26___of families in Britain.
The biggest change has been caused by ___27___. As ___28___ as 2 out of 3 marriages now
___29___ divorce, leading to a situation ___30___ many children live with one parent.
There has also been a __31___ rise in the number of women with children who work. The large rise in divorces has meant many women need to work to support themselves and their children. Even where there is no divorce, many families need both parents to work in order to ___32___. This has caused an increase in childcare ___33___, though it is very ___34___ and can be difficult to find in many areas.
___35___, women are no longer happy to stay at home ___36___ children, and many have careers ___37___ as much or even more than men, the traditional breadwinner.
There has also been a ___38___ increase in the number of single mothers, particularly ___39___ teenagers. Some people have blamed this increase __40___ the rise in crime. They feel the lack of a male role model has __41__ these children in society.
____42__, these changes have not had a totally ___43___ effect. For women, it is now much easier to have a career and good salary. ___44___ children themselves, some argue that modern children grow up more independent and ___45___ than in the past.
26. A. composition B. ingredient C. structure D. element
27. A. distraction B. divorce C. diversity D. divergence
28. A. much B. more C. many D amount
29. A. result from B. lead to C. cease to D. End in
30. A. which B. why C. what D where
31. A. in number of B. in a number of C. in numbers of D. in the number of
32. A. survive B. revive C. revolve D. evolve
33. A. appliance B. equipments C. instruments D. facilities
34. A. modernized B. expensive C. available D. cheap
35. A. on the contrary B. in contrast C. to sum up D. in addition
36. A. rousing B. rising C. raising D. arising
37. A. earning B. to earn C. to be earned D. having earned
38. A. sharp B. abrupt C. progressive D. shivering
39. A. for B. in C. between D. among
40. A. for B. in C. against D. to
41. A. suffered B. favored C. damaged D. injured
42. A. moreover B. hence C. consequently D. however
43. A. positive B. negative C. radical D. absolute
44. A. for B. as for C. as far as D. so far
45. A. humble B. ripe C. mature D. sophisticated
Part Ⅳ Reading Comprehension (30%)
A
The water we drink and use is running short in the world. We all have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field.
Today in most large cities，fresh water is used only once，then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again，just as it were fresh from a spring.
But even if every large city purified and reused its water，we still would not have enough. Then we could turn to the oceans. All we'd have to do to make use of the seawater on earth is to get rid of the salt. This process is called desalinization，and it is already in use in many parts of the world.
( ) 51. The way to stop wasting our limited water is to ________.
A. do experiments with water
B. purify the used water and reuse it
C. use fresh water once again
D. make use of seawater
( ) 52. The following tells us how to reuse the used water. Which is the right order of the passage？
A. to have the used water filtered
B. to put chemicals in it
C. to pipe it to the users
D. to pipe the used water to be purified to a factory
( ) 53. There wouldn't be enough water for us if we didn't _________.
A. turn to the oceans for more water
B. reuse used water and make use of seawater
C. desalt seawater
D. take steps to reuse all water on earth
( ) 54. The would "it" in the last sentence refers to _______.
A. seawater
B. purified water
C. the process of getting rid of the salt in seawater
D. the process of collecting salt from the sea oceans
( ) 55. The best title for the passage is "_______".
A. How to Reuse Water
B. Two Solutions to the Problem of Water Shortage
C. Stop Wasting Our Limited Water
D. How to Make Use of SeawaterPassage Four
B
In order to learn to be one’s true self, it is necessary to obtain a wide and extensive knowledge of what has been said and done in the world; critically to inquire into it; critically to inquire into it; carefully to consider it; clearly to analyze it ;and earnestly to carry it out.
It matters not what you learn, but when you once learn a thing, You must never give it up until you have mastered it. It matters not what you inquire into it, But when you once inquire into a thing, you must never give it up until you have thoroughly understood it. It matters not what you try to think of, but when you once try to think of a thing, you must never give it up until you have what you want. It matters not to try to carry it out, but when you once try to carry out a thing, you must never give it up until you have done it thoroughly and well. If another man succeeds by one effort, you will use a hundred efforts. If another man succeeds by ten efforts you will use a thousand.
( ) 56. According to the author, first of all one must
A. analyze
B. inquire
C. obtain knowledge
D.act
( ) 57. When you try to do something, what matters is _________.
A.not to care too much about it
B.to act immediately
C.to think carefully before you do it
D.to carry it through to the end
( ) 58. The end of learning should be __________.
A. thought
B. mastery
C. inquiry
D. analysis
( ) 59. According to the author, another man’s success should _________.
A.spur us on to greater efforts
B.not be taken into consideration
C.make us nervous
D.cause one to stop trying
( ) 60. The author implies but does not say that___________.
A.the way to knowledge is through specialization.
B.One has to know everything to be successful
C.Success depends not so much on natural ability as it does on effort
D.Success in one’s profession is least important in one’s life
Part ⅤWriting (15%)
以<童年的快乐和痛苦>（The Pleasure and Pains of Childhood）为题,参考一下提示,在25分钟内写作一篇不少于100词的作文.
1)童年是美好的时光.儿童有父母关怀,过着无忧无虑的生活.
2)童年也有童年的痛苦.
答案:
一．1—7 C A C A B D D
8. mine
9. could
10. the
11. another
12. although
13. highly
14. delighted
二．
15. 这些限制包括自然资源的固定供应，工业对自然环境造成不利影响的可能性，以
及世界人口的不断增加。
16. 如果他们能察觉出颜色的差异，那么我们可能也不知不觉到受到颜色的影响。
17. 在1870年，马和骡子是美国农场的主要劳动力来源。
三．26—45 C B C D D D A D B D C A A D A C D B B C
四．51—60 B A B C B C D B A C
五．Childhood is a time when there are few responsibilities to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. It is improbable that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the child -things that have lost their interest for older people because they are too well-known. A child finds pleasure in playing in the rain, or in the snow. His first visit to the seaside is a marvelous adventure. But a child has his pains: he is not so free to do as he wishes as he thinks older people are; he is not so free to do as he wishes as he thinks older people are; he is continually being told not to do things, or being punished for what he was done wrong. His life is therefore not perfectly happy.
继电保护复习提纲(清华大学)
复习提纲 第一章绪论 1．电力系统继电保护的作用 2．对继电保护的基本要求（四个基本技术性要求） 第二章相间短路的电流电压保护和方向性电流保护 第一节单侧电源电网相间短路的电流电压保护 1．单侧电源电网相间短路电流保护的整定计算 一、二、三段电流保护动作值整定计算方法 一、二、三段电流保护动作时间整定计算 特别注意：阶梯时间特性 2．基本概念：不同接线方式性能比较 第二节多侧电源电网相间短路的方向性电流保护 1．功率方向继电器（GJ）的工作原理 2．使用功率方向继电器的目的：保证选择性 一、二段电流保护：动作值不能保证选择性时需使用功率方向继电器 三段电流保护：动作时间不能保证选择性时需使用功率方向继电器 特别注意：三段电流保护设置功率方向继电器的选择条件 第三章接地短路的零序电流保护和方向性零序电流保护 1．三段式零序电流保护的动作值整定原则 2．基本概念：灵敏零序一段电流与不灵敏零序一段电流 3．零序电流保护的主要特点 第四章电网的距离保护 第一节距离保护的基本概念 1．距离保护的作用原理 2．距离保护的主要组成元件 第二节单相阻抗继电器的构成原理 1．阻抗继电器的动作方程 2．阻抗继电器的动作特性 3．阻抗继电器的交流接线 （只要求全阻抗、方向阻抗与偏移阻抗） 第三节系统振荡对单相阻抗继电器的影响 1．系统振荡对单相阻抗继电器的影响 2．振荡闭锁装置的基本原理（要点：系统振荡与故障的主要区别）第五节距离保护的整定计算 1．一、二、三段距离保护动作值整定计算方法 2．一、二、三段距离保护动作时间整定计算 3．分支系数的影响： 二段保护整定：保护整定时取可能的最小分支系数，对应实际保护范围最大的情况，以保证其选择性（不延伸进入下条线路II段保护范围）三段保护灵敏度校验：取可能的最大分支系数，对应实际保护范围最
最新大学英语1考试题库及答案
大学英语1测试答案 注意：标红为答案 测验一： （AABAA BBACA CBCCA CAAAA，题目顺序随机）题目1：They have a share.
A. each； B. every 题目2：child enjoys Christmas. A. Every； B. Each 题目3：My pen is lost. This one is my A. brother； B. brother's 题目4：Have you the skirt by yourself? A. made； B. built 题目5：My room is than the one next door. A. cleaner； B. cleanner； C. cleanest 题目6：John is the of the three brothers. A. taller； B. tallest； C. tall 题目7：We've entered an agreement. A. for； B. into； C. * 题目8：He entered his son the English examination. A. for； B. into； C. * 题目9：No one saw the thief when he entered the buliding. A. for； B. into； C. * 题目10：Everyone he will win. A. believes； B. believe 题目11：Just then, the telephone rang. It rang____. A. at once； B. immediately； C. again； D. at that moment 题目12：The shop assistant found some curtain material___me.
大学英语II 复习材料
昆明学院继续教育学院医学相关专业成人教育复习资料 科目：_______大学英语II______ ______ 姓名：______________________________ 学号：______________________________
Book 3 Unit 1 Choose the best way to complete each of the following sentences. 1. Jason and Lucy advised me ______ too much; otherwise I would have been drunk. A. not drinking B. not to drink C. to drink D. drinking 2. Nowadays, new technology has made ______ possible to produce new products faster and at lower costs. A. this B. that C. it D. one 3. The biggest jewelry store is reported in the newspaper ______ in broad daylight yesterday. A. robbed B. to be robbed C. be robbed D. to have been robbed 4. _______ kind to the enemy is _______ cruel to yourself. A. To be… to be B. Be… be C. To be…be D. Be… to be 5. Perry doesn’t have to be made ________ because he always studies very hard. A. to learn B. learn C. learning D. learned 6. The way we type _______ the way we spell. A. effects B. effective C. affecting D. affects 7. Our elders look down ______ spelling and grammar errors. A. in B. to C. on D. at 8. We almost never see a teen use extensive vocabulary _______ by our teachers in a text message.
(完整word版)大学英语一期末考试题以及答案
精心整理 大学英语（一） 行政班级分级班级姓名学号 C. A measuring system. D. A control system. 2. A. Car prices. B. Car services.
C. The company’s business. D. The company’s culture. 3. A. It’s easy to do. B. It’s challenging. dialogue, there are some recorded questions. Both the conversations and questions will be spoken two times. Conversation 1
6. A. Breakfast. B. Dinner. C. A 5 dollar gift card. D. Bus service to the airport. 10. A. Make an appointment with her. B. Talk with her about a new order.
C. Send her an email about the shipment. D. Call her back when receiving the shipment. Directions: This part is to test your ability to construct grammatically correct sentences. It consists of 2 sections.
电力系统继电保护复习题摘录4
1绪论 1.1填空题 1.电力系统继电保护应满足(选择性) (速动性) (灵敏性) (可靠性)四个基本要求。 2.电力系统发生故障后，总伴随有电流(增大)电压(减小)线路始端测量阻抗的( 减 小)电压与电流之间相位角(变化)。 3.电力系统发生故障时，继电保护装置应(切除故障)，电力系统不正常运行时，继 电保护装置一般应( 跳闸)。 4.电力系统切除故障时的时间包括( 继电保护的动作时间)时间和(断路器跳 闸)的时间。 5.继电保护灵敏性指其对( 其保护范围内)发生故障或不正常工作状态的反应 能力。 6.继电保护装置一般由( 测量部分)、( 逻辑部分) 和( 执行部分)组 成。 7.继电保护装置的测量部分是由被保护元件的( 被保护对象输入有关的电气 量)与保护的( 已给的整定值)进行比较。 1.2选择题 1.我国继电保护技术发展过了五个阶段，其发展顺序是( C ) A机电型晶体管型整流型集成电路型微机型 B机电型整流型集成电路型晶体管型微机型 C机电型整流型晶体管型集成电路型微机型 2.电力系统最危险的故障( 三相短路) 3.电力系统短路时最严重的后果是( C ) A电弧使故障设备损坏 B使用户的正常工作遭到破坏
C破坏电力系统运行的稳定性 4.继电保护的灵敏度系数K1m要求( C ) A K1m<1 B K1m=1 C K1m>1 线路保护一般装设两套，它们是(一套为主保护，另一套为后备保护) 1.3问答题 1.继电保护装置在电力系统中的所起的作用是什么？ a.自动、迅速、有选择性地将故障元件从系统中切除，使故障元件免于继续遭 到破坏，恢复无故障部分正常工作。 b.反应电气元件的不正常运行状态，并根据运行维护条件，而动作于发出信号、 减负荷或跳闸。 2.继电保护装置通过那些环节完成预定的保护功能，各环节的作用是什么？ (1)测量部分:从被保护对象输入有关的电气量作为保护动作的判据，并与已给 的整定值进行比较，判断保护是否动作。 (2)逻辑部分:使保护装置按一定的逻辑关系工作，确定是否应该使断路器跳闸 或发出信号，是否延时等。 (3)执行部分:完成保护装置所担负的任务。 3.后备保护的作用是什么？阐述远后备保护和近后备保护各自的优缺点。 （1）对被保护范围内的故障，能迅速的有选择性加以切除，以保证系统中其它非故障部分继续运行。 （2）远：断路器拒动时，仍然能切除故障。动作失去选择性，切除故障时间长。 （3）近：动作仍具选择性，切除故障时间短。断路器拒动时，无法切除故障。
《大学英语1》期末考试综合复习资料
《大学英语1》期末考试综合复习资料 I. Use of English(20%)—交际英语，共10道选择题，每题2分，共20 分。 II.Reading Comprehension (40%)—阅读理解，4篇文章，共20道选择题，每题2分，共40分。 III.Vocabulary and Structure(30%)—词汇与语法，共30道选择题，每题1分，共30分。 IV.Cloze Test (10%)—完形填空，共10道选择题，每题1分，共10分 I. Use of English (10×2) Directions:In this part there are 10 incomplete dialogues. For each dialogue there are four choices marked A, B, C and D. Choose the ONE answer that best completes the dialogue. Then mark the corresponding letter on the Answer Sheet with a single line through the center. 1. —Excuse me, could you please tell me how to get to the railway station? —____________ A. No, I couldn’t. B. Sorry, I don’t know. I’m new here. C. I couldn’t tell you. D. You can’t ask me. 2. — What day is today? — _____________. A. Today is March 24. B. Today is not bad. C. Today is sunny D. Today is Saturday 3. —How do you do? Glad to see you. — _________________________ A. How are you? Me too. B. How do you do? Glad to meet you. C. I am fine, thank you. And you? D. Nice, how are you? 4. —I’m sorry. Bob’s not in his office. — _________ A. Can you take a message for me? B. Are you sure for that? C. Would you like to leave a message? D. Can you phone me?
新版大学英语2练习题
Unit 1 Ways of Learning Part I. Vocabulary & Structure 1. To use the machine, first__________the correct coins, then select the drink you want and press the button. A. inside B. insert C. concert D. insist 2. __________, it was the wrong time to open a new data processing center in his city. A. In retrospect B. In due course C. In service D. In need 3. The little girl did ______ seem to be ____________frightened of being left by herself in the house. A. not…at most B. not…at best C. not… in the least D. not…at worst 4. When the moon ________from behind the clouds I made out a figure moving in the distance. A. urged B. appear C. emerged D. encouraged 5. Make sure the label is firmly ____________ to the parcel before you mail it. A. enclosed B. matched C. made D. attached 6. My __________reaction to the news was relief, but as I thought more about it I began to feel angry. A. only B. initial C. foremost D. beginning 7. I have had ____________problems with this computer ever since I borrowed it from a friend. A. continuous B. continual C. continue D. continued 8. Complaints from the students began arriving at the __________’s office. A. principle B. prince C. principal D. print 9. We have often made that mistake ____________. A. himself B. herself C. themselves D. ourselves 10. Did you fix the computer ______________? A. on her own B. on his own C. on your own D. on our own 11. My boyfriend bought me dinner to __________ being late the day before. A. make up for B. make of C. make from D. make it 12. The WTO is intended to ________trade among its member state. A. reduce B. promote C. decrease D. deduce 13. A full understanding of math is sufficient to explain a wide variety of natural ________. A. scenes B. situations C. phenomena D. occasions 14. The committee __________ a decision from the head office before it takes any action. A. are waiting B. is waited C. are waited D. is waiting 15. Professor Smith translated not only from the English but also, __________, from the Chinese. A. on occasion B. on the rise C. one the increase D. on the
大学英语期末试题B卷
学号 姓名 系部 专业 班级 考试科目 考试时间 年 月 日 密 封 线 山东师范大学历山学院2013-2014学年第二学期 期末考试试题（B 卷） 试题卷 （时间120分钟，满分100分） 课程编号： 课程名称： 大学英语 适用年级： 2013级 适用专业： 非英语 学制： 三 注意：1、本试题试题卷共六页。 2、本试题所有答案应写在答案卷上，否则不予计成绩。 题号 Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ 总分 阅卷人 复核人 得分 Ⅰ ⅠListening Comprehension (15%) Section A Directions: In this section you will hear 10 short dialogues. At the end of each dialogue, a question will be asked about what was said. Both the dialogues and questions will be spoken twice. After each question there will be a pause. During the pause, you must read the 4 choices marked A,B,C and D,and decide which is the best answer. Then write the corresponding letter on the Answer Sheet. 1. Where did this conversation probably happen? A In a drug store. B In a shop. C In a supermarket. D In a restaurant. 2. When will the train leave? A 14:20 B 14:00 C 14:40 D 14:30 3. How many people are there in the man ’s family? A 5. B 4. C 3. D 6. 4. How is that school? A It's even worse than people say. B It's better than it used to be. C It's better than people say. D It's not as good as it was. 5. What is implied in the conversation? A The children were enjoying themselves. B The children didn't come to the party. C The children were giving a lot of fun in the party. D The children were not behaving themselves in the party. 6. What will the weather be like? A It will get better B Rainy C Sunny. D It is colder. 7. What does the woman mean? A She does not agree with the man. B She does not know what to do. C She agrees with the man. D She has a good idea.
电力系统继电保护(第二版)复习资料
第一章 问答： 1.电力系统继电保护的基本任务是什么？ 发生故障时自动、迅速、有选择性地将故障元件从电力系统中切除，使故障元件免于继续遭到损坏，保证其他无故障部分迅速恢复正常运行。 反应电气设备的不正常运行状态，并根据运行维护条件，而动作于发出信号或跳闸。此 时一般不要求迅速动作，而是根据对电力系统及其元件的危害程度规定一定的延时，以免暂短的运行波动造成不必要的动作和干扰引起的误动。 2.电力系统短路有哪些：单相接地短路、两相短路、两相接地短路、三相短路。 3.发生短路的后果有哪些？ 通过短路点的很大短路电流和所燃起的电弧，使故障元件损坏。 短路电流通过非故障元件，由于发热和电动力作用，会使其的损坏或缩短其使用寿命。 电力系统中部分地区的电压大大降低，使大量的电力用户的正常工作遭到破坏或产生废品。 破坏电力系统中各发电厂之间并列运行的稳定性，引起系统振荡，甚至使系统瓦解。选择、填空 1.继电保护装置的构成部分：测量比较元件、逻辑判断元件、执行输出元件。 2.对继电保护的要求，灵敏系数的要求？ 可靠性：包括安全性和信赖性。 选择性：指保护装置动作时，在可能最小的区间内将故障从电力系统中断开，最大限度地保证系统中无故障部分仍然继续安全运行。 速动性：指尽可能快地切除故障，以减少设备及用户在大短路电流、低电压下运行的时间，降低设备的损坏程度，提高电力系统并列运行的稳定性。 灵敏性：指对其保护范围内发生故障或不正常运行状态的反映能力。 灵敏系数的要求：一般灵敏性系数在1.2—-2 之间。 第二章电网的电流保护 问答：
1?什么是90度接线方式？优缺点？动作内角范围的确定？0《（l）k《90,其功率方向继电当 器的动作内角？ 是指系统三相对称，且功率因数cos <1)=1的情况下，加入继电器的电流Ir,超前电压 Ur90度的接线方式 优点：对各种两相短路都没有死区 适当选择内角后，对线路上各种相间故障保证动作的方向性 缺点：不能清除电压死区 动作内角范围的确定。三相短路时0《&《90 (0《(bk ?90) 两相短路时30《已《60 动作条件一90《(I)r+a《90 或cos (r+a)》0 选择、填空 1.电流1段、2段动作电流的整定原则、优缺点： 电流1段是按躲过线路末端最大三相短路电流整定，优点是作为本线路首端主保 护，动作迅速，缺点是不能保护线路全长，只能15%左右、电流2段是按躲过相邻元件末端最大三相电流或相邻元件电流速断保护的动作电流配合，按两个条件中较大的整定，优点是 作为本线路首端的近后备，本线路末端的主保护，相邻下一线路首段的远后备，能保护全长，缺点是不能作为相邻下一线路的完全远保护。 2.过电流继电后备保护的分类 3.中性点直接接地系统接地短路零序电压的分布，决定零序电流分布的因素？ 零序电压故障点最高，离故障点越远处的零序电压越低，变压器中性点的零序电0压为 而与F 零序电流的分布主要决定于输电线路的零序阻抗和中性点接地变压器的零序阻抗，源的数目和位置无关
【练习版】大学英语1复习资料(考试用)
【练习版】大学英语1复习资料（考试用） 【阅读理解】 第一单元 About twenty of us schoolchildren had been fortunate enough to receive invitations to a film-studio to take part in a crowd-scene. Although our “art” would only (1)for three minutes, we were given the opportunity to see quite a number of interesting things. Soon after we arrived , bright lights were turned on. Since it was very hot in the studio, it came as a (2) to us to see one of the actors put on a overcoat. He (3) a hat down over his eyes , put his hands in his pockets, and started walking along a winding path. A big fan began (4) small white feathers down on him, and soon the bare trees were covered in “snow”. Two more fans were turned on, and a “strong wind”whistled through the trees. The first actor was dragging through the snow when the second, (5) as a beggar, began walking towards him trembling with cold. The next (6) was a complete contrast. The way it was filmed was quite (7) .Pictures taken on an island in the Indian Ocean were shown on a glass screen. An actor and an actress stood in front of the (8) so that they looked as if they were at the water’s edge on an island. Since it was our (9) next, we were left wondering what scene would be prepared for us .For a full three minutes in our lives we would be experiencing the (10) of being film “stars”! Instructions dressed image surprise excitement scence shaking pulled blowing sequence turn extraordinary severe last anticipate 第二单元 When he got the call that his son was ill in California and not expected to live for long, Bill didn’t know (1) he was going to get the money for his wife and himself to make the trip. Bill had worked as a truck driver his entire life, but he never managed to have any (2). So with (3) Bill walked the mile to the filling station and told the owner, ”My son is really sick and I’ve got no cash. Can you trust me for the phone call to California?” “Pick up the (4) and talk as long as you need to,” was the answer. As
《大学英语2》 复习题
《大学英语》复习题 Part I Vocabulary and Structure Directions: In this part there are 20 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then write the corresponding letter on the Answer Sheet. 1. During the Ice Ages, man developed the use of tools, and this is a way of protecting himself against ______. A. shortcoming B. hazards C. faults D. conflicts 2. The passengers were ______ of all their money. A. robbed B. stolen C. lost D. taken 3. Some guards were injured in the prisoners’ ______ from the jail. A. breakthrough B. breakup C. breakdown D. breakaway 4. Boys in our school are not allowed to ______ long hair. A. put on B. have on C. dress D. wear 5. When he failed to pay his bill, the company ______ his electricity. A. switch off B. put off C. take off D. cut off 6. How did it come ______ that you made a lot of mistake in your homework? A. about B. after C. with D. to 7. ______ an umbrella with you in case it rains. A. Bring B. Hold C. Take D. Fetch 8. Some guards were injured in the prisoners’ ______ from the jail. A. breakthrough B. breakup C. breakdown D. breakaway 9. He did n’t take the flat because he could not afford the ______. A. hire B. fare C. rent D. salary 10. When he failed to pay his bill, the company ______ his electricity. A. switch off B. put off C. take off D. cut off 11. John isn’t here. He’s on assignment in New York. So the person you spoke to this morning ______ have been John. A. must B. might C. might not D. can’t 12. Little ______ that their plan has been discovered. A. they suspect B. do they suspect C. they suspected D. did they suspect
大学英语期末试卷
《大学英语 二》期末考试试题 I. Spell the following words according to the given meanings . (10%) 1. b___________ give birth to 2. e___________ leave unprotected; uncover 3. o___________ easily seen, recognized or understood 4. m__________ offer something for sale 5. s___________ fill something tightly with something else 6. b___________ consider or compare 7.f____________ provide money for 8. t___________ express intention of hurting, punishing, etc. 9. g_________ _______ act or be in opposition to 10.s________ _______ cause something to increase speed II. Choose the best answers: ( 20%) 1．April l st is day when strange things may happen and the best trick is that makes everyone laugh, including the “fool ”. A ．the; one B ．a; one C ．the; the one D ．a; the one 2．Dalian is well known for its mild climate, but it be very cold in winter. A ．shall B ．can C ．should D ．must 3．If we develop the world successfully, we must make sure that everyone is able to take part in the new world we create. A ．are about to B ．are going to C ．are to D ．will 4．—Did you really buy a new house in Beijing? — . A ．How do you feel it? B ．That ’s all right. C ．Believe it or not D ．It ’s up to you. 5．—Was it in 1969 the American astronauts succeeded landing on 姓名：______________ 班级：________________ 学号：_____________________ ……………………………………………………密……封……线……内……不……要……答……题…………………………………………………………
电力系统继电保护复习知识点总结材料
第一章、绪论 1、电力系统运行状态概念及对应三种状态： 正常（电力系统以足够的电功率满足符合对电能的需求等）不正常（正常工作遭到破坏但还未形成故障，可继续运行一段时间的情况）故障(电力系统的所有一次设备在运行过程中由于外力、绝缘老化、误操作、设计制造缺陷等原因会发生如短路，断线等故障) 2、电力系统运行控制目的： 通过自动和人工的控制，使电力系统尽快摆脱不正常运行状态和故障状态，能够长时间的在正常状态下运行。 3、电力系统继电保护： 泛指继电保护技术和由各种继电保护装置组成的继电保护系统。 4、事故： 指系统或其中一部分的正常工作遭到破坏，并造成对用户停电或少送电或电能质量变坏到不能允许的地步，甚至造成人身伤亡和电气设备损坏的事件。 5、故障： 电力系统的所有一次设备在运行过程中由于外力、绝缘老化、误操作、设计制造缺陷等原因会发生如短路，断线等。 6、继电保护装置： 指能反应电力系统中电气设备发生故障或不正常运行状态，并动作与断路器跳闸或发出信号的一种自动装置。 7、保护基本任务： 自动、迅速、有选择性的将故障元件从电力系统中切除，使元件免于继续遭到损坏，保障其它非故障部分迅速恢复正常运行；反应电气设备的不正常运行状态，并根据运行维护条件，而动作于发出信号或跳闸。 8、保护装置构成及作用： 测量比较元件（用于测量通过被保护电力元件的物理参量，并与其给定的值进行比较根据比较结果，给出“是”“非”“0”“1”性质的一组逻辑信号，从而判断保护装置是否应启动）、逻辑判断元件（根据测量比较元件输出逻辑信号的性质、先后顺序、持续时间等，使保护装置按一定的逻辑关系判定故障的类型和范围，最后确定是否该使断路器跳闸、发出信号或不动作，并将对应的指令传给执行输出部分）、执行输出元件（根据逻辑判断部分传来的指令，发出跳开断路器的跳闸脉冲及相应的动作信息、发出警报或不动作） 9、对电力系统继电保护基本要求： 可靠性（包括安全性和信赖性；最根本要求；不拒动，不误动）；选择性；速动性；灵敏性 10、保护区件重叠： 为了保证任意处的故障都置于保护区内。区域越小越好，因为在重叠区内发生短路时，会造成两个保护区内所有的断路器跳闸，扩大停电范围。 11、故障切除时间等于保护装置（0.06-0.12s，最快0.01-0.04s）和断路器动作时间（0.06-0.15，最快0.02-0.6）之和。 12、①110kv及以下电网，主要实现“远后备”-一般下级电力元件的后备保护安装在上级（近电源侧）元件的断路器处；②220kv及以上电网，主要实现“近后备”-，“加强主保护，简化后备保护” 13、电力系统二次设备： 对一次设备的运行状态进行监视、测量、控制和保护的设备。
大学英语1 总复习题
《大学英语1》课程综合复习资料 I. Use of English 1. — Write to me when you get home. — OK, I ___C____. A) must B) should C) will D) can 2. ― I hope I am not interrupting your work. ― _________A_______. A) Oh，that’s all right. B) O.K. Let’s start again. C) Please go on with your work. D) It’s hard to say. 3. —let me introduce myself. I am Tom. — ___D____. A) What a pleasure B) It's pleasure C) I'm very pleased D) Pleased to meet you 4. — Could you pass me the salt and pepper? — ___B____. A) Sorry，I didn't know what you mean. B) Ok，here you are. C) No，I won't. D) I don't know. 5. —Why haven’t you bought any butter? — I ____C_____ to but I forgot about it. A) liked B) wished
D) expected 6. —“Where is Mary?” —“She __C__ to school.” A) will go B) has been C) has gone D) went 7. — Have you finished your housework__A__? — Yes. I have____ finishe A) yet，already B) already，yet C) ever，never D) still，just 8. — How are you? — ____D____ A) I am quite good. B) I am very sorry. C) How are you? D) Fine，thank you. 9. — I usually go there by train. — Why not ____B___ by boat for a change? A) try to go B) try going C) try go D) go to try 10. —Do you think ____D_____ he should go to the music club or not? —Sorry, I have no idea. A) that B) what
《大学英语》2复习题及答案
英语复习题 I.Multiple Choice 1.—Oh, Tom, what did you do this summer vacation? —Guess what? I had ______ great fun in _______ show performance Voice of China. A. a; the B. the; the C. 不填; a D. 不填; the 2. —Did you watch the play The Legend of Zhen Huan last night? —Yes. I have never enjoyed a __________ Chinese TV drama. A. more exciting B. more excited C. most exciting D. most excited 3. In 2011, Li Na became the first Chinese __________ a Grand Slam. A. winning B. win C. have won D. to win 4. In China, the students who study business is ________ those who study a language. A. as many as ten times B. as ten times than C. ten times as many as D. more than ten times 5. ________ our parents get old, their hair will go grey. A. As B. While C. When D. Though 6. When it ______ Kungfu films, most people naturally think of Bruce Lee. A. comes across B. comes up C. comes to D. comes out 7. I would really appreciate ________ if you could pay in cash. A. that B. it C. which D. 不填 8. _______ quickly, and you will be able to catch the train. A. To get up B. Getting up C. Get up D. If you get up 9. It was ______ that I didn’t want to leave my room. A. so a cold day B. such cold a day C. too cold a day D. so cold a day 10. Sherry was sitting on a bus looking out of the window _______ the accident took place. A. when B. that C. as D. while