中石油华东《科技英语》2015年秋学期在线作业(一)100分答案

中国石油大学（华东）《电力电子技术》2015年春学期在线作业（一）满分答案《电力电子技术》2015年春学期在线作业(一)一、单选题：1.为了让晶闸管可控整流电感性负载电路正常工作，应在电路中接入( )。

(满分:5)A. 三极管B. 续流二极管C. 保险丝D. 电力场效应晶体管正确答案:B2.三相全控桥式整流电路带电阻负载，当触发角α=0º时，输出的负载电压平均值为( )。

(满分:5)A. 0.45U2B. 0.9U2C. 1.17U2D. 2.34U2正确答案:D3.单相桥式可控整流电路输出直流电压的平均值应该等于整流前交流电压的( )倍。

(满分:5)A. 1B. 0.5C. 0.45D. 0.9正确答案:D4.对于可控整流电路，其换流重叠角大小的影响因素，主要包括( )。

(满分:5)A. 变压器等效漏感LBB. 直流侧电流IdC. A、B两个方面都有影响D. Ud代表的平均值电压的增加量正确答案:C5.单相半波可控整流电阻性负载电路中，控制角α的最大移相范围是( )。

(满分:5)A. 0º-180°B. 0º-15°C. 0º-120°D. 0º-90°正确答案:A6.普通晶闸管是一种单向导电器件，它在电压阻断能力方面的特点是( )。

(满分:5)A. 仅具有正向阻断能力B. 仅具有反向阻断能力C. 正、反向电压阻断能力都具备D. 接入反并联二极管时，正、反向电压阻断能力才都具备正确答案:C二、多选题：1.题目如下：有源逆变的条件包括( )。

(满分:5)A.B.C.D.正确答案:AC。

中石油华东2015年春季学期《大学英语 2》在线考试(适用于2015年6月份考试)满分答案1. She is working very hard to ______ the lost time at school.A. make forB. make up forC. make upD. make ou正确答案：B 满分：1 分得分：12. With the problem ______, we are getting along even more smoothly.A. settlesB. to settleC. settledD. to be settling正确答案：C 满分：1 分得分：13. __________ our records, the books you have borrowed should now be returnedto the library.A. Due toB. ConcerningC. Regardless ofD. According to正确答案：D 满分：1 分得分：14. —Do you mind if I smoke here? —__________A. Yes, certainly not.B. No, please don’t.C. Sorry, it’s forbidden here.D. Yes, I mind.正确答案：C 满分：1 分得分：15. —Excuse me, when is the next flight from London due to arrive? —_________A. In half an hour.B. An hour before.C. Until the next one.D. Before another one.正确答案：A 满分：1 分得分：16. ______ only five minutes to finish the task.A. I took myselfB. It required meC. It took meD. It needed me正确答案：C 满分：1 分得分：17. —I’m glad you like it. Please drop in any time you like. —__________A. Yes, I will.B. I’m afraid I won’t be free.C. Is it all right?D. That’s great.正确答案：A 满分：1 分得分：18. Tom ______ be at home because he telephoned me from Beijing just a moment ago.A. mustn’tB. isn’t able toC. can’tD. may not正确答案：C 满分：1 分得分：19. Shanghai is the place _____ the great Communist Party of China was born.A. whichB. whereC. whenD. that正确答案：B 满分：1 分得分：110. Jack and Bill are twins, but the former is taller than ________.A. laterB. lateC. latestD. the latter正确答案：D 满分：1 分得分：111. ______ one occasion he helped an old woman who was in danger ______ the risk of his life.A. In, asB. On, atC. By, withD. At, in正确答案：B 满分：1 分得分：112. Her son promised __________ in the bedroom until the baby stopped__________.A. staying, to cryB. to stay, cryingC. for staying, to cryD. to stay, to cry正确答案：B 满分：1 分得分：113. —I'm afraid I have spilled some coffee on the table cloth. —____________A. Oh, don't worry about that.B. You needn’t apologize.C. I feel sorry for that.D. Oh, you shouldn’t have done that.正确答案：A 满分：1 分得分：114. —May I see the menu, please? I’ve been waiting an hour already. —_________.A. That is the menu, sirB. Yes, please go onC. Here you are, sirD. Of course, sir正确答案：C 满分：1 分得分：115. —Do you think living in the countryside has more advantages? —____________A. Yes, perfectly.B. Well, it depends.C. Yes, it is.D. Nothing at all.正确答案：B 满分：1 分得分：116. Since he was ______ to the post of school principal, he has had complaints from the students and their parents.A. assignedB. awardedC. arrangedD. afforded正确答案：A 满分：1 分得分：117. —George, I would like to introduce a friend of mine, if I may: Albert Snow. Albert, this is George Smith. —____________A. How have you been?B. Pleased to meet you, George.C. Mind if call you George?D. The pleasure’s mine.正确答案：B 满分：1 分得分：118. Clothes and blankets have been __________ among the refugees.A. distributedB. contributedC. attributedD. conducted正确答案：A 满分：1 分得分：119. Someone called me up in the middle of the night, but they hung up ______ I could answer the phone.A. asB. sinceC. untilD. before正确答案：D 满分：1 分得分：120. —It’s really nice of you to give me a hand in time! —____________A. Thank you.B. No, no.C. With pleasure.D. It’s my pleasure.正确答案：D 满分：1 分得分：121. —You look tired. What’s the matter? —______________A. It doesn’t matter.B. Oh, my head aches badly.C. It is not the matter.D. Don’t worry.正确答案：B 满分：1 分得分：122. The columnist feels sure ______ wins the election will have the support of the parties.A. whoeverB. whomeverC. whateverD. whenever正确答案：A 满分：1 分得分：123. —Do you mind telling me where you’re from? —_________.A. Certainly. I’m from LondonB. Sure. I was born in LondonC. Not really, you can do itD. Certainly not. I’m from London正确答案：D 满分：1 分得分：124. —Which one do you prefer, the window seat or the aisle seat?—_____________A. I prefer a window seat.B. I like neither.C. Both will do.D. I don’t know.正确答案：A 满分：1 分得分：125. —I’m sorry. Bob’s not in his office. —_________A. Would you like to leave a message?B. Are you sure for that?C. Can you take a message for me?D. Can you phone me?正确答案：C 满分：1 分得分：126. Sports, ______ perhaps you don’t like very much, may make you strong.A. thatB. itC. whichD. what正确答案：C 满分：1 分得分：127. If you don’t ______ at least one of the conditions, you can’t becomea member of our club.A. pleaseB. satisfyC. interestD. mention正确答案：B 满分：1 分得分：128. —You seem to have a lot of work to do in your office. You’ve always been working overtime. —____________A. You are right, but don’t you know the meaning of work?B. Sorry, I don’t think so. I get overpaid for overwork, you know.C. That’s right. All work and no play make Jack a dull boy.D. That’s right, but the work is interesting. I don’t mind some extra hours at正确答案：D 满分：1 分得分：129. —I think the movie is really exciting and touching. —____________A. So am I.B. So do I.C. Neither do I.D. The same to you.正确答案：B 满分：1 分得分：130. The young couple _______ their new life to a railway train on a longunknown track.A. imaginedB. figuredC. comparedD. cheered正确答案：C 满分：1 分得分：1二、完型填空（共1 道试题，共20 分。

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中石油华东2015年春季学期《大学英语2》在线考试（适用于2015年6月份考试）满分答案中石油华东2015年春季学期《大学英语2》在线考试(适用于2015年6月份考试) 满分答案单选题完型填空阅读理解单选题一、单选题（共30 道试题，共30 分。

）1. It ______ that I’ll be sent abroad next year.A. seems probablyB. seems clearlyC. seems likeD. seems likely-----------------选择：D2. I am ______ the same old breakfast every morning.A. bored ofB. bored withC. tired withD. tired from-----------------选择：B3. This picture ______ me of the past events associated with mychildhood.A. remembersB. remindsC. recallsD. recollects-----------------选择：B4. Jack and Bill are twins, but the former is taller than ________.A. laterB. lateC. latestD. the latter-----------------选择：D5. —I want to look up a new word. Could you lend me your dictionary?—____________A. Yes, I can.B. Here you are.C. Sorry, I don’t think so.D. You can take it.-----------------选择：B6. —I’m sorry. Bob’s not in his office. —_________A. Would you like to leave a message?B. Are you sure for that?C. Can you take a message for me?D. Can you phone me?-----------------选择：C7. —What would you do if it ____ tomorrow? —We have to carry it on,since we’ve got everything ready.A. rainB. is rainingC. will rainD. rains-----------------选择：D8. —I’ll be away on a business trip. Would you mind looking after my cat? —Not at all. _______A. I’ve no time.B. I’d rather not.C. I’d like it.D. I’d be happy to.-----------------选择：D9. The young couple _______ their new life to a railway train on a long unknown track.A. imaginedB. figuredC. comparedD. cheered-----------------选择：C10. You’ll fail in the driving test ______ you have more practice.A. ifB. unlessC. whenD. after-----------------选择：B11. The strike is said ______ by the gove rnment’s negligence of the people’s welfare.A. to be causedB. to causeC. being causedD. to have been caused-----------------选择：D12. It was an exhibition _________ French paintings.A. composing ofB. composedC. composed ofD. made of-----------------选择：C13. —Do you think I could borrow your dictionary? —________.A. Yes, you may borrowB. Yes, go onC. Yes, help yourselfD. It doesn’t matter-----------------选择：C14. It was with great joy ______ he received the news that his long lost son would soon return home.A. soB. asC. thatD. since-----------------选择：C15. Clothes and blankets have been __________ among the refugees.A. distributedB. contributedC. attributedD. conducted-----------------选择：A16. Although many young people are eager to go abroad, he prefers_________ in his own country.A. stay and workB. stayed and workedC. to stay and workD. to be stayed and worked-----------------选择：C17. Hardly ______ the classroom when the class began.A. had he enteredB. he enteredC. has he enteredD. he had entered-----------------选择：A18. It suddenly ______ to him that this was something he should neverdo.A. happenedB. occurredC. took placeD. broke out-----------------选择：B19. I am writing to ______ your appointment as Headmaster of the Grammar School.A. congratulateB. congratulate onC. congratulate to you onD. congratulate you on-----------------选择：D20. The coffee is wonderful! It doesn’t taste like anything I _____ before.A. was havingB. haveC. have ever hadD. had ever had-----------------选择：C21. ______ one occasion he helped an old woman who was in danger ______ the risk of his life.A. In, asB. On, atC. By, withD. At, in-----------------选择：B22. —You look tired. What’s the matter? —______________A. It doesn’t matter.B. Oh, my head aches badly.C. It is not the matter.D. Don’t worry.-----------------选择：B23. ——“Excuse me, what’s the ______ of the room per day?”——“Fifty dollars.”A. payB. changeC. incomeD. charge-----------------选择：D24. Some customers complain that it usually _____ so long to get refund for the inferior goods they bought.A. takesB. costsC. spendsD. spares-----------------选择：A25. Seldom ______ any mistake during my past fifteen years of service here.A. I did makeB. did I makeC. should I makeD. I made-----------------选择：B26. I think they will go to town tomorrow, __________?A. do IB. don’t IC. will theyD. won’t they-----------------选择：D27. —Excuse me, is this seat free? —__________.A. No, you can’t sit hereB. Sorry, it is takenC. Yes, it is seated by a boyD. Yes, but I don’t know-----------------选择：B28. —Tom, this is Hack, Fred is ill in hospital. —Oh, _________A. it’s sad.B. it’s bad.C. I’m sorry to hear that.D. that’s not good.-----------------选择：C29. The case ______ a lot of things, ______ a second-hand watch.A. included; containedB. included; containingC. contained; includedD. contained; including-----------------选择：D30. —Mom, I’m very sorry for having broken the plate.—Oh, boy, ____________A. it doesn’t matter.B. no problem.C. that’s right.D. thank you.-----------------选择：A2015年春季学期《大学英语2》在线考试(适用于2015年6月份考试) 单选题完型填空阅读理解单选题二、完型填空（共 1 道试题，共20 分。