单项选择题
英语单项选择(50题)练习题带答案含解析
英语单项选择（50题）练习题带答案含解析一、选择题1．It's ______ great surprise when I heard ______ news about the accident.A．the; a B．a; theC．a; 不填 D．the; the2．Titan is believed to be the only body in _____ solar system other than the Earth with liquid on ______ surface.A．the; / B．/; the C．/; / D．the; the 3．Scientists across the world agree that this is an invention of _______ great significance,_______ invention that will greatly change human life.A．a; the B．a; an C．/ ; the D．/ ; an4．John’s uncle is ______ IT engine er, and he usually develops a new type of software every________ few months.A．the; a B．an; a C．a; / D．an; /5．--- Jim took one-hour ride just now.--- He spent such a short time finishing such a long way!A．a B．an C．the D．/6．Almost all the people in Binhai, our hometown, work hard to make it ________ better place. A．a B．an C．the D．/二、选择题7．—Today’s Yangtze Evening, please.—There’s only one copy left. Would you like ________?A．they B．them C．it D．one8．— Lucy, do you know whose wallet it is on the table?—Sorry, I don’t know. I asked many people, but ________ knew.A．nobody B．everybody C．anybody D．somebody9．I can take good care of myself. I do not depend on ________.A．anybody B．everybody C．nothing D．something三、选择题10．— What is the ________ of your excellent works?— Just practice again and again.A．value B．duty C．secret D．result11．—The sweater is not the right ________ for me.—Well, shall I get you a bigger one or a smaller one?A．price B．color C．size D．material(材料)四、选择题12．You shouldn’t eat so much chocolate _________ meals. Because it will affect your appetite. A．except B．through C．between D．unless五、选择题13．Last week a fireman came to our school and told us what to do if a fire ________.A．breaks out B．works out C．puts out D．runs out 六、选择题14．—Is it usually warm in Yancheng in May?—Yes. But it _______ be rather cold sometimes.A．must B．should C．would D．can 15．The boy is very brave．I ________ he ________ the tall tree．A．dare say; dares to climbB．dare to say; dare climbingC．dare saying; dares climbD．dare to say; dares climbed七、选择题16．________ good advice Jim has offered!A．What B．What a C．How D．How a 17．—________we faced while we were carrying out the task!—Thanks to the volunteers, we could avoid it.A．How big disaster B．How good luckC．What a big disaster D．What good luck18．________ exciting news it is! We can visit Shanghai Disneyland in a month. A．How B．What C．What a D．What an 19．– Our classmates are going to Rose Garden after the exam.–______ exciting idea!A．What B．How C．What an D．How an 八、选择题20．—________ will the Jinniu Lake Animal Kingdom be open?—Maybe in the second half of this year.A．When B．Who C．What D．Where 21．— are you handing out the leaflets for？—To ask people to care more about the left-behind children．A．How B．Why C．What D．Who 22．—Hi, Amy.________can the member of the Birdwatching Society visit the wetlands?—Once a year, usually in spring.A．How often B．How many times C．How soon D．How long 九、选择题23．Don’t make any noise, Jim! Your little sister ________ n ow.A．sleeps B．slept C．is sleeping D．will sleep 十、选择题24．Bob is young, _______ he knows a lot.A．because B．so C．but D．unless 25．The jacket is nice, _________ it doesn’t look good on me.A．so B．if C．but D．or 26．—Hurry up, Tom, we’ll be late for the movie.—Ok, I will.A．but B．or C．and D．So十一、选择题27．―Do you know ________, Alfred?—At 2:00 tomorrow afternoon.A．when the end-of-term concert began B．when did the end-of-term concert begin C．when the end-of-term concert will begin D．when will the end-of-term concert begin 十二、选择题28．—I promise I will work harder this term, Miss Li.—Well, just as the saying goes, “________”. I do hope that you will act soon.A．It never rains but pours B．Many hands make light work C．Actions speak louder than words D．A friend in need is a friend indeed 29．Lisa, don’t do many things at one time, or you’ll be tired out. You can’t .A．burn the candle at both ends B．provide for a rainy dayC．put all your eggs in one basket D．do as Romans do when in Rome十三、选择题30．—I have got a new job as a presenter in the Wenzhou Radio Station!—________.A．Come on B．Good idea C．Congratulations D．All right十四、选择题31．—The construction of Subway Line 4 in Jinan has begun!—Wonderful. It will be more convenient for people _________ in the suburb to travel around. A．live B．living C．lived D．lives 32．—What makes you so brave to volunteer in the community?—Because I know that there must be so many people __________ for our support.A．to wait B．wait C．waiting D．waited 33．While all Chinese are fighting COVID-19, medical staff（工作人员） ________ on the front line are heroes.A．stood B．stand C．standing D．to stand 34．Most of the artists____________ to the party were from South Africa.A．invite B．to invite C．invited D．inviting 35．________with his flat, mine looks__________ new.A．Compared; as good as B．To compare; as well as C．Compared; as well as D．To compare; as good as36．Nobody can imagine what difficulty we had home in the snowstorm.A．to walking B．to walk C．walked D．Walking37．My mother usually eats a little for supper________. She looks slimmer than before.A．to save money B．saving money C．to lose weight D．losing weight 38．energy，turn off the lights when you leave the room.A．Saving B．Save C．To save D．Saved十五、选择题39．Stan Lee, a famous American comic book writer, for about five months, but the fictional characters he co-created are still alive on screen.A．died B．has died C．has been dead D．was dead十六、选择题40．Our society would be better off but for the fact that the economy ________ by the current global financial crisis.A．had been affected B．were affectedC．should be affected D．is affected41．During the quality time at night, the father enjoys watching TV, while the mother together with her three children fond of listening to popular songs.A．is B．are C．was D．were42．Mr. Black, as well as the professor who________ from Beijing University, ________ to attend our school meeting.A．come; is B．comes; are C．comes; is D．come; are 43．—Sorry, I’m afraid Dr. Johnson isn’t at his office now.—Well, I ________ him on his mobile phone instead.A．called B．have called C．will call D．is calling 44．Candy has decided to move to Taipei next year. When she studies in an art school there, she ________ with her aunt for five months.A．lives B．lived C．has lived D．will live 45．—Parents are always there for us. They ______ us if we’re in trouble.—I agree with you.A．help B．are helping C．will help D．helped46．—I really enjoy the shows in the programme Online Travel in China.—Me too. More online shows about Chinese culture________soon.A．will open B．have opened C．is opening D．open 47．—Jenny, you look busy recently.—I’m practising running these days. I the Nanjing Marathon this autumn.A．was taking part in B．has taken part inC．took part in D．will take part in十七、选择题48．I will never forget the people and the things_______ I saw on the Great Wall.A．who B．which C．whom D．that十八、选择题49．________ more and more people surf the Internet for news, the traditional newspaper maynot disappear in a short time.A．Because B．Since C．Though D．Unless 50．—Labour education is an important course for students’ self-development.— Exactly. schools put it into practice, students will learn a lot.A．While B．Unless C．If D．As【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】【详解】考查冠词。
英语单项选择(50题)基础练习题含解析
英语单项选择（50题）基础练习题含解析一、选择题1．_______ unexpected heavy rain usually causes _______ great change.A．The; the B．An; 不填C．An; the D．The; a 2．George couldn’t remember when he first met Mr. Anderson, but he was sure it was _____ Sunday because everybody was at _____ church.A．/; the B．the; /C．a; / D．/; a3．Look, there is “u” and“s” in the word university .A．an ; an B．a; an C．a; a D．/ ; a二、选择题4．My parents have made ________ a habit to go out for a walk around Xuanwu Lake.A．this B．it C．that D．one5．—Wow! Jim plays the piano so well.—Not ________ can play it like this. He works hard at it.A．everybody B．somebody C．nobody D．anybody三、选择题6．For the time being we can collect much ________ either from books or on the Internet. A．idea B．method C．information D．suggestion四、选择题7．The speaker showed ________ examples to make the science report easy to understand. A．awful B．proper C．stupid D．tiring8．Millie used to be ________, but now she can make friends with others and organize activities. A．shy B．active C．honest D．lively五、选择题9．—The boy is tall enough ________ his age.—Yes, I was much shorter when I was his age.A．of B．at C．from D．for10．The workers will build a new road ________ the two villages.A．from B．among C．at D．between六、选择题11．A survey about why teenagers like bilibili so much was ________ here last week. A．taken out B．carried out C．turned out D．worked out 12．—Oh, my God! I have ________ 5 pounds!—No worries. It’s normal for a growing teenager.A．put up B．put down C．put on D．put off七、选择题13．—How beautiful the winter jasmines (迎春花) are!—Yes. These golden-yellow flowers ________ be widely seen in my city in March.A．must B．can C．would D．should八、选择题14．________ big success the film ________ her novel was!A．What a, based upon B．What, was based onC．What a, was based upon D．How, based on15．Don’t let any failures influence your moods, for you can never tell ________ close you may be to victory.A．what B．why C．where D．how九、选择题16．— ________ is it from your school to your home?— 20 minutes by bus.A．How far B．How long C．How soon D．How often 17．—________ do your parents come to visit you in the US, Tom?—Once a year.A．How often B．How long C．How soon D．How far十、选择题18．— I hope to travel in space one day.—That’s not just a dream. It’s reported the first space hotel in the near future. A．builds B．is built C．will build D．will be built 19．It is amazing to the whole world that Huoshenshan Hospital and Leishenshan Hospital________ in 10 days.A．completed B．were completed C．will complete D．will be completed 十一、选择题20．My toothache me. I thought it was going away, but it is getting worse now.A．kills B．is killing C．has killed D．killed21．One of the firms I applied to has offered me a job but I _____ my options open until I hear from the others.A．have kept B．will have keptC．am keeping D．keep22．— Excuse me, can you show me the way to the nearest bus stop?—Sorry. I’m a stranger here. I ______ here until my guide arrives.A．stand B．have stoodC．am standing D．will stand23．—Bob, can you take the dog for a walk?—Sorry, Dad. I ________ an online class.A．take B．took C．am taking D．have taken 24．Now ABC Cinema on Forest Road ________ the old film called Roman Holiday.A．is show B．is showing C．is showed D．is on十二、选择题25．Don’t be crazy abo ut computer games, ________ your parents will be worried.A．and B．or C．but D．so十三、选择题26．—Hi, Mary! I want to go to Qinghai Museum, but I am not sure ________ get there.—Don’t worry. Let me tell you.A．how could I B．how I can C．how can I D．how I did27．W e haven’t decided ________.A．that we will repair our house B．when did we go to the partyC．where we went on vacation D．whether we will keep a pet十四、选择题28．In England, if you think that other people are always in a better situation than you, even when the y are not, we say “________”.A．the grass is always greener on the other side B．every dog has its dayC．the early bird catches the worm D．actions speak louder than words十五、选择题29．— Would you mind my turning on the TV? The New Year concert has just begun.— ________. Just go ahead.A．Please don’t B．Better not C．Of course not D．I’m afraid not 30．—Mum, Joe has broken a cup!—________. Accidents always happen.A．Pretty good B．Of course C．It doesn’t matter D．That depends 31．—It’s been a wonderful party. Thank y ou very much?—- ________________.A．With pleasure B．No , thanks C．It’s OK D．I’m glad you enjoyed it .十六、选择题32．The film Hello, Mom! is such a moving film that I think it is well worth________ .A．to watch B．watching C．watches D．watch33．China has successfully prevented the Covid-19 from _______ through the country. A．spread B．to spread C．spreading D．spreads34．---Do you have any idea what Paul does all day ?--- As I know, he spends at least as much time playing as he .A．writes B．does writing C．is writing D．does write十七、选择题35．—Carl, are you coming with us?—I’d love to, but something unexpected ______.A．is coming up B．comes up C．came up D．has come up 36．—Would you like to watch the film Fast and Furious 9 tonight?— Sure. I still want to see it again although I ________ it already.A．watch B．will watch C．was watching D．have watched 37．Both his parents look sad. Maybe they _________ what's happened to him.A．will know B．know C．have known D．are knowing 38．— I think the man over there must be Douglas.— It ________ be him. He has ________ to Australia.A．can’t, gone B．can’t, been C．may not, been D．mustn’t, gone十八、选择题39．---I didn’t expect that John would be absent from my last Sunday’s birthday party.--- As far as I know, he ______ to see his parents in the countryside on Sundays.A．goes B．wentC．has gone D．had gone40．All of you ______ at the school gate! We’ll soon start.A．will gather B．gatherC．will be gathering D．are gathering41．Both xiangchun and shepherd’s purse (荠菜) ________ popular vegetables at their best in spring.A．are B．is C．will be D．were42．—I want to know if he ________ back tomorrow.—I’ll call you as soon as ________.A．will come; will return B．will come; returnsC．comes; will return D．come; returns43．Each of us _____ a life goal, which will guide us to a bright future.A．has B．have C．will have D．had44．—Have you heard of the latest news about WIFI?—Yes. When the 5G age , the Internet speed will be 100 times as high as 4G.A．come B．comes C．will come D．is coming十九、选择题45．—It’s the best time to visit Lianyungang now.—Yes, it is the beautiful city ________ I want to visit.A．where B．who C．which D．when46．--- Have you ever seen the film The Shawshank Redemption?---Yes, and I think it is the best film teaches me a lot.A．that B．which C．what D．/47．—You look smart in the T-shirt ________ your daughter bought for you.—Thanks a lot.A．which B．who C．whom D．whose48．----- Have you found the information about the famous teachers_______ you can use for your writing.-----No, not yet. I’ll search some on the Internet.A．who B．what C．where D．which49．---What kind of movies do you like?--I like movies_______ are about Chinese history.A．who B．whom C．whose D．that二十、选择题50．—More and more people like shopping online now.—I agree. My sister will be crazy about it ________ my parents give her enough money.A．if B．unless C．when D．while【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】考查冠词。
单项选择题(20题)
单项选择题（20题）1.尾矿堆积坝上升速率（）设计堆积上升速率是重大事故隐患。
[单选题] *A、大于；(正确答案)B、小于；C、等于2.浸润线埋深（）控制浸润线埋深是重大事故隐患。
[单选题] *A、大于；B、小于；(正确答案)C、等于3.经验算，坝体抗滑稳定最小安全系数小于国家标准规定值的（）倍是重大事故隐患。
[单选题] *A、0.85；B、0.90 ；C、0.95 ；D、0.98(正确答案)4.用以贮存独立选矿厂进行矿石选别后排出尾矿的场所，未按（）实施安全管理的是重大事故隐患。
[单选题] *A、临时堆场；B、隐患点；C、尾矿库；(正确答案)D、排土场5. 坝体的平均外坡比或者堆积子坝的外坡比（）设计坡比是重大事故隐患。
[单选题] *A、大于；(正确答案)B、小于；C、等于6.尾矿库重大隐患是指（）。
[单选题] *A、尾矿库存在的所有隐患B、尾矿库可能导致的重大事故隐患(正确答案)C、尾矿库可能导致的轻微事故隐患D、尾矿库可能导致的环境污染隐患7.多种矿山性质不同的尾砂混合排放时，必须按（）进行排放。
[单选题] *A、设计内容；(正确答案)B、申报内容；C、预期要求8.“外坡比”指的是尾矿坝的垂直高度与水平宽度的比值。
坝体的平均外坡比是对尾矿堆积坝坝体外坡整体坡度的评价指标，堆积子坝的外坡比是对（）尾矿筑坝法子坝外坡坡度的评价指标。
[单选题] *A、上游式；(正确答案)B、中游式；C、下游式9. 《尾矿库安全规程》（GB39496-2020）第6.1.9条规定：采用尾矿堆坝的尾矿库，应在运行期对尾矿坝做全面的（），以验证最终坝体的稳定性和确定后期的处理措施。
[单选题] *A、安全性复核；(正确答案)B、周期性检查；C、定向性检查；D、不定期检查10. 《尾矿库安全规程》（GB39496-2020）第5.3.15条规定：尾矿坝应满足渗流控制的要求，尾矿坝的渗流控制措施应确保浸润线（）控制浸润线。
单项选择题(共50题
一、单项选择题（共50题，每题1分）：1. 法律对社会发展能否起进步作用，决定于（ ）。
A. 是否适应一切经济基础的需要B. 是否能积极地为自己的经济基础服务C. 法律所服务的经济基础是否适应生产力的需要D. 是否适应国家的需要2. 公民在法律面前一律平等，是我国（ ）。
A. 社会主义法的基础B. 社会主义立法的基本原则C. 社会主义法的实施的基本原则D. 宪法的总的指导思想3. 人民法院是（ ）。
A. 国家权力机关B. 国家行政机关C. 国家审判机关D. 公安机关4. 我国的国家结构形式属于（ ）。
A. 民族区域自治B. 单一制C. 联邦制D. 邦联制5. 中央军事委员会的领导体制是（ ）。
A. 集体负责制B. 双重从属制C. 主席负责制D. 合议制6. 凡属法院审判工作中具体应用法律的问题，由（ ）进行解释。
A. 全国人民代表大会B. 最高人民法院C. 全国人民代表大会常务委员会D. 各级人民法院6. B7. D8. D9. A 10.B7. 行政行为法具有的两种属性之一是（ ）。
A. 分散性B. 统一性C. 多样性D. 程序性8. 《行政处罚法》规定，行政处罚通常由（ ）的行政主体管辖。
A. 违法行为人住所地B. 违法行为人经常居住地C. 违法行为损害发生地D. 违法行为发生地9. 行政裁决的对象是（ ）。
A. 特定的民事纠纷B. 特定的行政纠纷C. 特定的经济纠纷D. 特定的刑事纠纷10. 若发现已生效的行政执法行为违法或不当，则（ ）。
A. 原行政机关无权废止B. 原行政机关或上级行政机关有权撤销C. 只有权力机关有权撤销D. 相对一方当事人有权变更11. 公安机关在紧急的情况下，对罪该逮捕的现行犯或重大嫌疑分子，采取的临时限制人身自由的强制方法是（ ）。
A. 拘役B. 拘留C. 拘传D. 逮捕11.B 12.A 13.B 14.C 15.B12. 代理人应为（ ）的利益而行使代理权。
单项选择100题
单项选择100题1. After he gave a report about the school, Mr White____ the visitors around it.A. went on to showB. went on showingC. went on with showingD. kept on showing2. -- Tom works hard at English.?-- _____, and _____.A. So does he; so you doB. So you do; so is heC. So he will; sodo you D. So he does; so do you3. When you write to him, please _____ him.A. give my loves toB. give my regard toC. remember me toD.give my wishes for4. We have done things we ought not to have done and_____ undone things we ought to have done.A. leftB. leaveC. will leaveD. leaving5. People are puzzled _____ they read the book.A. the first timeB. at the first timeC. for the first timeD. at first6. In some countries,_____ are called "public schools" are notowned by the state.A. thatB. whichC. asD. what7. -- The boy is tall enough _____ his age. --Yes, I was much_____ when I was his age.A. to; shorterB. at; tallerC. at; shorterD. for; shorter8. --Who are you waiting for? -- _____ the man wounded in theleft leg.A. The doctor will operate onB. Tie nurse to be looked afterC. The doctor to operate onD. His brother got9. --How did you _____ the movie last night? --Oh, both interesting and instructive.A. findB. considerC. thinkD. feel10. With his son _____, the old man felt unhappy.A. to disappointB. to be disappointedC. disappointingD. being disappointed11. The food tastes _____ and sells _____.A. well; wellB.good; goodC. good; wellD.well; good12. The sun was shining brightly, _____ everything there _____more beautiful.A. making; lookB. to make; lookedC. and made; lookingD. and making; be looked13. It' s too late to go out now. _____, it's starting to rain.A. BesidesB. MeanwhileC. HoweverD. Anyhow14. Everybody in the little town knew my first teacher, so we hadno ____ finding his home.A. difficulties inB. difficulty withC. difficultyD. difficulty to15. I can't understand it, will you please _____ once more?A. explain that wordB. repeat that wordC. explain us that wordD. explain that word for us16. --How often do you go to the library?--______.A. In two daysB. Every few daysC. Each third dayD. Every afew days17. We are just _____ calling you up _____ you come in.A. about; whenB. on the point of; whileC. on the point of; whenD. on the point of; as18. --They all agree _____ George. Has the project been passed?--Who _____ George can make the final decision?A. except; expectB. except; besidesC. but; butD. besides; but19. I come to tell you Jack _____ for London next month.A. is leavingB. is about to leaveC. will leaveD. would leave20. You can say "He went there _____, not _____."A. on the car; by carB.on foot; in his carC. by foot; by carD.inhis car; by his foot21. Jack is a good friend _____, he often comes to our home fora visit.A. of my fatherB. of my father'sC. for my fatherD. with myfather22. What way are you thinking of _____ rid of the flies?A. to getB. gettingC. being gotD. to be getting23. We must do something to _____ factories _____waste water into the river before it is cleaned.A. stop; pouring .B. prevent; to pourC. keep; pouringD. stop;to pour24. "_____ of them are not here." means "_____ of them are not here."A. All; SomeB. Both; EveryC. Both; NeitherD. All; Both25. --How did you do in the test?--Not so well. I _____ much better but I misread the directionsfor Part D.A. could doB. could have doneC. must have doneD. should do26. Mary cares about clothes too much, and she _____ too much money _____ clothes.A. spend; inB.cost; atC. pays; toD. spends; on27. Our kind teacher wanted to teach us _____ he knew athis lesson.A. thatB. all whatC. that allD. everything which28. They started early that morning in order that they_____ there before noon.A. would getB. gotC. must getD. might get29. Is this research center _____ the foreign guests visited last week?A. thatB. whichC. whereD. the one30.--What is the model plane look like? --Well, the wings of the plane are _____ of its body.A. more than the length twiceB. twice more than the lengthC. more than twice the lengthD. more twice than the length31. The enemy troop suddenly took the small village by surprise _____ a rainy morning.A. onB. atC. inD. during32. This is the school _____ they visited last year and is the one _____ my father once worked.A. that; whereB. where; thatC. where; whereD. that; that33. The college entrance examination is coming, the students are _____ it.A. preparingB. prepared forC. preparedD. preparing for34. The task was very hard, so _____ were needed.A. ten more menB. ten men moreC. more ten menD. men more ten35. He wanted to read more, so he asked his friend if there was _____ to read.A. something easy enoughB. something enough easyC. enough easy somethingD. easy enough something36. The room is very large and only little room _____ by the new piano.A. are taken upB. takes upC. is taken upD. is taking up37. What _____ time it is to listen to a speech having nothing todo with you!A. wasteB. wastesC. a waste ofD. a waste for38. _____ your help, we have _____.A. Thanks to, finishedB. Thanks to, endedC. Thanks for, finishedD. Thanks for, completed39. When and where to build the new factory _____ yet.A. is not decidedB. are not decidedC. has not decidedD. havenot decided40. It is necessary ___ me ___my studies before a new term.A. for, to make a plan forB. of, making a plan forC. for, to make a plan ofD. of, making a plan of41. He _____ the club and _____ its activities.A. took part in; joinedB. joined; took part inC. joined; took a part inD. took part in; took part in42. The noble man prefers ___money to him ___sorry to him.A. giving; to sayingB. giving; to sayC. give; to sayD. to give; to saying43. To gain honor for our country, we will try our best_____ the game.A. competing inB. competing againstC. to compete withD. to compete in44. Tom was so angry with Bob that he hit _____.A. Bob in the headB. Bob's headC. Bob on the headD. onBob's head45. _____ at the news that I didn't know what to say to comforther.A. So sad she lookedB. So sad did she lookC. So sadly shelooked D. So sadly did she look46. Only a fool enjoys _____ in public.A. making fun ofB. to make fun ofC. being made fan ofD. to be made fan of47. Our English teacher _____ by the teachers and students.A. is good thought ofB. is thought high ofC. is sung highly praise forD. is spoken highly of48. I like ______ of the two stories, for this story is _____ than that one.A. both; not more interestingB. neither; no more interestingC. neither; not more interestingD. either; no more interesting49. You'd better make a mark _____ you have any questions.A. at whichB. at whereC. the placeD. where50. The stubborn boy didn't _____ so that he missed the chance.A. take adviceB. follow an adviceC. give some adviceD. ask for advice51. Old as the car is, _____ it works quite well.A. butB. yetC. soD. however52. They were _____ inventors than pure scientists.A. moreB. lessC. manyD. worse53. The teachers are doing what they _____ their stuaits.A. can to teachB. can teachC. can teachingD. can to teaching54. Liaocheng, Shandong Pro. is a beautiful city, ____11 pay a three-day visit.A. whichB. whereC. to whichD. in which55. Don't have your children _____ for hours reading books in_____ dark a room.A. sitting; soB. sit; suchC. to be sitting; soD. to sit; such56. I want to know _____.A. what the matter isB. what matter it isC. what's the matterD. the matter is what57. After so long a walk, he was too _____ further.A. tired for walkB. tire to walkC. tiring to goD. tired to go58. Why not trust and use David? He is still as strong as____ inthe team.A. somebody elseB. everybody elseC. anybody elseD. nobodyelse59. After the accident, she had _____ all over.A. painsB. painC. acheD. aches60. I forget where I read the article, or I _____ it to you now.A. will showB. would showC. am going to showD. am showing61. ____for the doctor's careful treatment, he____till last year.A. If it is not; can't liveB. Were it not; couldn't liveC. Had it not been; couldn't have livedD. If they were not ; couldn't live62. They stayed up until midnight _____ the old year out and thenew year in.A. and sawB. to seeC. seeingD. for seeing63. George spent _____ studying.A. the whole dayB. all during the dayC. altogether a dayD.entirely a day64. You may _____ find it hard to get along well with them.A. certainlyB. likelyC. possiblyD. probably65. The house that _____ by the fire belongs toA. was destroyed, mineB. destroyed, mineC. was destroyed,me D. destroyed, me66. ---____ will the meeting _____?---In about 20 minutes.A. How long, lastB. When, lastC. How often, finishD. How soon, end67. While _____ in the room, we were all very excited.A. waitedB. waitingC. to waitD. wait68. _____ you _____ to go to watch the football match with me?A. Would; likeB. Would; ratherC. Do; feel likeD. Do; would like69. She asked _____ we were getting on well with our work.A. howB. ifC.whatD. that70. I'm wondering_____ he expects will win the gold medal inMen's Single.A. whomB. whichC. whoD. what71. Don't think of the exam. _____, it has been passed quite afew days.A. In allB. Not at allC. After allD. At all72. She _____ a man _____ a lot of money.A. was married; withB. married; withC. marrietl; toD. was married; to73. During the next ten years we both worked day and night to_____ the money we had borrowed.A. pay offB. pay forC. pay toD. pay back74. --Where do you think _____ he _____ the computer?---Sorry, I have no idea.A. /; boughtB. has; boughtC. did; buyD. had; bought75. We have been _____ by all our friends since we settled in thenew house.A. called onB. called atC. called intoD. called for76. I _____ her voice at once on the phone, though we hadn'tseen each other for ten years.A. heardB. knewC. realizedD. recognized77. But she had to ___ the company and ____a man in order toget a job.A. lie to; pretended to beB. lie; pretended to beC. lie to; pretended beingD. lie; pretended as78. The man went into the room, _____ rather strange.A. to lookB. lookingC. lookedD. and looking79. The driver drove __ hit a big tree and the car came to a stop.A. too carelessly toB. carelessly enough toC. so carelessly thathe D. so careless that he80. When he saw all his books _____ here and there on the floor,he knew that something terrible _____.A. lying; must have happenedB. lie; must happenC. lay; might have happenedD. had lain; could have happen81. ____Mr Brown's anger, it was his own son who didn't agree____him.A. To; withB. Because of; toC. With; ofD. For; on82. But later people developed a way of printing, _____rocks.A. usedB. usingC. and useD. uses83. The problem was that it is ____valuable ___everyday use.A. too; toB. too; forC. too; ofD. so; that84. ---Where is Mother---She is in the kitchen. She _____the housework all morning.A. is doingB. was doingC. has doneD. has been doing85. What a strange man! He loves his wife, but _____ he oftenbeats her.A. at a timeB. at one timeC. at timesD. at the same time86. The books, _____ the dictionaries, must be put back wherethey _____.A. included; wereB. to include; areC. including; wereD. including; are87. Paper _____ the fibres of plants for many years.A. has been made fromB. have been made out ofC. has madeup of D. have been made into88. Before the game started Alien's friends believed he was ___but he didn't feel ___. Then after the first ten minutes, he beganto take heart.A. sure to win; sure to successB. sure of success; sure of itC. sure to win; sure about thatD. sure about winning; sure to win89. His father looks young, but _____ fact he is _____.A. in; in the fortiesB. in; in his fortiesC. in the; in the fortiesD.in; in his forty90. It's quite strange that the man sleeps with his mouth____ andhis eyes _____.A. closed; openB. closed; openedC. closing; openD. closing; opening91. If you have a problem _____ your composition, you had better ask your teacher ______.A. in; on some adviceB. for; for some advicesC. on; some adviceD. with; for some advice92. There _____ a lot of coal mines in the south, but many ofthem have been closed or are _____ be closed.A. use to having; about toB. used to be; toC. use to having;going to D. used to be; supposed to93. The weather in Britain is ____too cold in winter___too hot in summer.A. either; orB. both; andC. neither; norD. or; and94. Forgive him, please. I don't think he broke your mirror____.A. with careB. on purposeC. for funD. with aim95. He advised the fanners to choose the best seed-heads,____that had the best colour.A. the oneB. the onesC. oneD. ones96. Although he is considered a great writer, _____.A. his works is not widely readB. but his works are not widelyreadC. however his works are not widely readD. yet his works are not widely read97. --_____ of the population of the city _____workers? --About60 percent.A. What; isB. What; areC. How much; isD. How much; are98. I was advised to arrange for insurance _____ I needed medical treatment.A. althoughB. incaseC. so thatD. if only99.---What can I do for you？---Well，I'm afraid the box is heavy for you，but thank you all the same．A．so B．much C．very D．too100.--Peter is very clever and he studies hard as well．---No ______be always wins first in the examinations.A．doubt B．question C．wonder D．problem1--5 ADCAA 6--10 DDCAC 11--15 CAACA 16--20 BCCAB21-25 BAAAB 26-30 DBDDC 31--35 AADAA 36-40 CCAAA 41-45 BADCB 46-50 CDBDA 51-55 BAACA 56-60 CDCAB 61-65 CBACC 66-70 DBABC 71-75 CBDAA 76-80 DABCA 81-85 ABBDD 86-90 CACBA 91-95 DBCBB 96-100 DDBDC。
心理学单项选择测试题及答案
心理学单项选择测试题及答案一、单项选择题（每题1分，共10分）1. 心理学是一门研究什么的学科？A. 人类行为和心理过程B. 社会现象C. 物理现象D. 经济活动2. 弗洛伊德是哪种心理学派的代表人物？A. 行为主义B. 认知心理学C. 精神分析学D. 人本主义心理学3. 以下哪个不是认知心理学的主要研究领域？A. 感知B. 记忆C. 情绪D. 社会行为4. 根据马斯洛的需求层次理论，最基础的需要是什么？A. 自我实现B. 安全需要C. 生理需要D. 尊重需要5. 以下哪个是学习理论中的经典条件作用？A. 操作性条件作用B. 经典条件作用C. 观察学习D. 社会学习6. 认知失调理论是由哪位心理学家提出的？A. 斯金纳B. 弗洛伊德C. 费斯汀格D. 罗杰斯7. 以下哪个不是情绪调节的策略？A. 认知重评B. 表达抑制C. 问题解决D. 社会支持8. 以下哪个是积极心理学的主要研究内容？A. 心理疾病B. 积极情绪C. 心理创伤D. 消极情绪9. 以下哪个是社会心理学研究的领域？A. 人格发展B. 社会影响C. 心理测量D. 认知过程10. 以下哪个不是心理测量的工具？A. 智力测试B. 人格问卷C. 社会调查D. 心理实验答案：1. A2. C3. D4. C5. B6. C7. C8. B9. B10. C结束语：通过本测试题，我们对心理学的一些基本概念和理论有了初步的了解。
心理学是一门广泛且深入的学科，它不仅帮助我们理解自己和他人的行为，还有助于我们更好地应对生活中的各种挑战。
希望这份测试题能激发你对心理学的兴趣，并在未来的学习和生活中应用所学知识。
单项选择题(共60题
一、单项选择题(共60题，每题1分。
每题的备选项中，只有一个最符合题意)1．下列与工程建设有关的法律、法规、部门规章中，()属于行政法规范畴。
A．中华人民共和国建筑法B．建设工程安全生产管理条例C．建造师执业资格制度暂行规定D．建筑业企业资质等级标准2．注册建造师有权()。
A．超出聘用单位业务范围从事执业活动B．在两个或两个以上单位受聘或执业C．允许信得过的人以自己的名义从事执业活动D．对本人执业活动进行解释和辩解3．取得建造师执业资格证书的人员，以建造师名义执业的前提是()。
A．按规定注册B．按规定备案C．受聘单位验证D．主管部门审批4．法律关系主体之间的权利义务不复存在，彼此丧失了约束力即为法律关系的()。
A．中止B．终止C．中断D．暂停5．没有代理权、超越代理权或者代理权终止后的行为，只有经过被代理人的追认，被代理人才承担民事责任。
未经追认的行为，由()承担民事责任。
A．被代理人B．代理人C．行为人D．法人6．在债的发生根据中，引起债权债务关系发生的最主要、最普遍的根据是()。
A．合同B．侵权行为C．不当得利D．无因管理7．知识产权的权利主体依法享有独占使用智力成果的权利，他人不得侵犯。
例如，未经专利人许可不得使用其专利就表现了专利权的()。
A．专有性B．私有性C．归属性D．持有性8．诉讼时效是指权利人在法定期间内，未向人民法院提起诉讼请求保护其权利时，法律规定消灭其()的制度。
A．起诉权B．胜诉权C．申诉权D．请求权9．《合同法》第129条规定：“因国际货物买卖合同和技术进出口合同争议提起诉讼或者申请仲裁的期限为()年，自当事人知道或者应当知道其权利受到侵害之日起计算。
”A．1B．2C．3D．410．根据《建筑法》的规定，在建的建筑工程因故中止施工的，建设单位应当自中止施工之日起()内，向施工许可证发证机关报告，并按照规定做好建筑工程的维护管理工作。
A．7日B．10日C 15日D．1个月11．对于未取得施工许可证或者为规避办理施工许可证将工程项目分解后擅自施工的，由有管辖权的发证机关责令改正，对于不符合开工条件的责令停止施工，并()处以罚款。
英语单项选择(50题)练习题含答案含解析
英语单项选择（50题）练习题含答案含解析一、选择题1．It is said that ______ bridge was built in ______ Ming Dynasty.A．a; a B．the; theC．a; the D．the; a2．—What about _____ job?—It’s too difficult _____ job for me.A．the; a B．the; the C．a; the D．a; a3．Barack Obama, African America, was elected as 56th President of the United states. A．/，the B．/， / C．an ， the D．an ， /4．_______ meeting held last night was _________ great success.A．A; a B．A ; / C．The ; a D．The ; /5．Mr. Brown, ______ chairman of the trade union, will visit our factory in _____ month of May. A．/; the B．a; the C．the; / D．the; the 6．Among all kinds of traditional Chinese art, I like_______ Beijing Opera best because it is really ________fun.A．/;a B．/;/ C．the;/ D．the;a7．Look, the young woman who is playing _______ guitar is _______ university teacher. A．the ; an B．/; an C．the; a D．/ ; a二、选择题8．Some friends tried to calm down Mr. and Mrs. White and help solve their problem without hurting the feeling of ________, but failed.A．none B．either C．both D．neither 9．Wearing red makes________easy________us to take action.A．it; for B．this; of C．that; for D．it; of三、选择题10．— How do you like Jianye Library?—Wonderful! I’m especially satisfied with the high ________ of its service.A．cost B．value C．standard D．price四、选择题11．You’ve watched the boring soap opera thousands of times! Why don’t you go outside and find something ________ doing?A．useful B．cheerful C．enjoyable D．worth12．Helen is watching a basketball match Which is shown ________ on TV. Though he is not on the scene, he can still cheer for his team.A．lively B．live C．living D．alive五、选择题13．—Why can’t we drive in the emergency lane (应急车道) on expressway?—Because the lane makes it possible to race ________ the clock to save people’s lives. A．beyond B．over C．against D．through14．Though there are so many things around us that go ______ our will, we can’t give up because following the dream is valuable.A．through B．towards C．against D．beyond六、选择题15．Steve Jobs was a great man who ________ the use of digital music.A．pushed away B．pushed for C．pulled out D．put in七、选择题16．When you visit a museum, some instructions should ________ and we’d better not ________ them.A．pay attention to; be against B．be paid attention; againstC．be paid attention to; against D．be paid attention to; be against八、选择题17．—________ does your father play tennis after work ?—Every Tuesday and Thursday.A．How often B．How soon C．How much D．How long九、选择题18．No one knows when the bridge ________, because there is no record about it.A．has built B．built C．was built D．builds19．The film Hi! Mom has received high praise since it ________ on screen on February 12. A．was put B．is put C．has been put D．will be put 20．When the new city square ________ next year, it will be a good place for people to relax. A．will be finished B．is finishing C．was finished D．is finished 21．Many travel vouchers (旅游优惠券) ________ to attract more and more tourists next five months.A．will send B．will be sent C．are sent D．send十、选择题22．It is almost five years since Jimmy taught high school students and he _____ as an interpreter in a foreign enterprise.A．served B．had servedC．is serving D．would serve23．Food supplies in the earthquake area ________. We must act immediately before there’s none left.A．are being run out B．are running outC．have run out D．have been run out十一、选择题24．You’d better get up early, you will miss the first class.A．so B．and C．or D．but25．Just leave the key to the exercises behind, you will be dependent on it.A．or B．and C．so D．but26．—Ann, could you tell me ________ yesterday?—Oh, I went to the supermarket for shopping near my home.A．where did you go B．when you went C．who you will go with D．where you went 27．We haven’t decided ________.A．that we will repair our house B．when did we go to the partyC．where we went on vacation D．whether we will keep a pet28．—Jim is planning a trip to Shanghai this weekend, but still doesn’t decide________. —Why not take the high-speed railway? It’s fast and comfortable.A．who will he visit B．what he will doC．how he’s going there D．whom is he going with29．—Have you ever heard about the new law against food waste? I’m wondering ________. —Don’t worry. Of course it will.A．will it be helpful B．how will it be helpfulC．it will be helpful D．whether it will be helpful 30．Tomorrow is Earth Day. Let’s discuss ________.A．when shall we give out the leaflets B．what we can do to recycle thingsC．how should we save more energy D．whether can we make our city greener 31．The students are discussing ________.A．why they are often under stress B．when did Tom saw a doctorC．who would teach them English D．whether is stress a big problem十三、选择题32．—How can I get along well with the local people if I go to Germany?—________.A．The early bird catches the worm B．It never rains but it poursC．When in Rome, do as the Romans do D．A friend in need is a friend indeed 33．—You want my advice on this matter?—Of course, ________.A．I’m all ears B．I’m all eye C．it’s under my nose D．it’s not my tea 34．—All the people of Binhai should work together to make our hometown more beautiful.—Yes. ________.A．Many hands make light work B．Practice makes perfectC．Burn the candle at both ends D．Don’t put all your eggs in one basket十四、选择题35．—Would you like a small or a large bowl of noodles? —_______. I’m very hungry.A．A small bowl B．A large bowl C．Yes, please D．No, thanks 36．—I’m going hiking this afternoon. Would you like to go with me?—______, but I must finish my homework first.A．Sorry, I don’t B．That’s right C．I’d love to D．Not at all37．I improve my ________ English by ________ conversations with my friends in English. A．speak, practice making B．speaking, practicing making C．spoken, practicing making D．speaking, practicing to make 38．—Spring is also the time when the farmers are busy _______ the wheat.—Usually they don’t stop _______ even it’s lunchtime.A．growing; working B．growing; to work C．grow, to work D．grow; working 39．Many students admitted ________ games once in a while when they took online courses. A．play B．played C．playing D．to play 40．Huawei has succeeded in ________new software for his products. I can’t wait ________a new Huawei mobile.A．developing, to buy B．developed, buying C．developing, buy D．develop, buying十六、选择题41．— Where is Jim?— He ________ Beijing on business for a week. He’ll be back tomorrow.A．has come to B．has gone to C．has been to D．has been in十七、选择题42．This sort of clothing material, which feels soft, ______.A．catches fire easily B．is caught fire easilyC．is easy caught fire D．is easily to catch fire43．—Why are you so upset?—I had my computer repaired yesterday, but it ________ work again.A．doesn’t B．didn’tC．won’t D．wouldn’t44．During the quality time at night, the father enjoys watching TV, while the mother together with her three children fond of listening to popular songs.A．is B．are C．was D．were十八、选择题45．The Hong Kong-Zhuhai-Macao Bridge ________ is a masterpiece（杰作）in modem engineering has won high praise from the world.A．what B．why C．where D．which46．—It’s the best time to visit Lianyungang now.—Yes, it is the beautiful city ________ I want to visit.A．where B．who C．which D．when47．I will never forget the three years I spent with my classmates and teachers in the middle school.A．which B．when C．what D．where十九、选择题48．Suzy, you will achieve nothing ________ you devote yourself to your study.A．after B．though C．because D．unless49．— Has the meeting begun?—Not yet. We have to wait ________ everyone is here.A．and B．until C．or D．but50．—The local snack tastes spicy and sweet.—Well, ___________ you are here, why not have a try?A．since B．because C．though D．unless【参考答案】***试卷处理标记，请不要删除一、选择题1．B解析：B【解析】【详解】考查冠词。
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二、单项选择题1．母线不完全差动保护只需将母线上( )电流互感器，接入差动回路。
A．有源元件： B．全部元件； C．无源元件。
2．母线完全差动保护需将母线上( )电流互感器，接入差动回路。
A．有源元件： B．全部元件； c．无源元件。
3．母线完全差动保护差动继电器动作电流整定，需要躲开( )。
A．最大负荷电流； B．最小短路电流； C．最大短路电流。
4．PMH型快速母线保护是带制动特性的( )阻抗型母线差动保护。
A．高； B．中； C．低。
5．母线充电保护是指判别母联断路器的( )来实现的保护。
A．电压； B．电流； C．阻抗。
6．当母线内部故障有电流流出时，应( )差动元件的比率制动系数，以确保内部故障时母线保护正确动作。
A．减小； B．增大； C．减小或增大。
7．母线差动保护的暂态不平衡电流比稳态不平衡电流( )。
A．大； B．小； C．相等。
8．对母线保护用的中间变流器，一般要求误差电流不超过最大区外故障电流的( )。
A．5％； B．8％； C．10％。
9．微机母线保护装置( )辅助电流互感器。
A．可以采用； B．不宜采用； c．一定采用。
10．为了防止误碰出口中间继电器造成母线保护误动作，应采用( )。
A．电压闭锁元件： B．电流闭锁元件； c．距离闭锁元件。
11．正常运行或倒闸操作时，若母线保护交流电流回路发生断线，PMH型快速母线保护装置应( )闭锁整套保护。
A．延时或瞬时； B．瞬时； C．延时。
12．对于220kV及以上电力系统的母线，( )保护是其主保护。
A．母线差动； B．变压器保护； C．线路保护。
13．WMZ-41母线保护装置对应各单元主TA变比为600／5时，电流通道系数应整定为( )。
A．1； B．0．5； C．0．333； D．0．25。
14．差动保护制动特性试验，选两个单元，A单元固定加1A电流，B单元相位与A单元相反，当B单元电流增大到4A时，保护临界动作。
根据该试验结果，计算其制动系数值为( )。
A．O．5： B．0．7； C．0．8； D．0．6。
15．在电流通道系数整定为“0．5”单元上加电流校验差动保护定值，当电流增大到5A时保护临界动作，此时的差动保护动作值为( )。
A．5A； B．2．5A； C．7．5A。
1 6．双母线倒闸操作过程中，国电南自WMZ-41母线保护仅由( )构成，动作时将跳开两段母线上所有联接单元。
A．两个小差； B．大差、两个小差； C．大差。
17．当交流电流回路不正常或断线时，母线差动保护应( )。
A．闭锁； B．跳开； C．开放。
18．接入RCS-915A／B型微机母线保护装置的TA极性规定：接在I母线和II母线上的间隔元件的TA的极性星端，均以( )为星接入装置的星端。
A．线路侧； B．母线侧： c．母线或线路侧。
19．接入RCS-915A／B型微机母线保护装置的TA极性规定：母联的TA极性以( )侧为星端接入装置的星端。
A．I母； B．II母； c．没有限制。
20．BP．2B母线保护装置双母线接线，当母联断路器处于分位时，( )自动转用比率制动系数低值。
A．I母比率差动元件；B．大差比率差动元件； c．II母比率差动元件。
21．对于BP-2B母线保护装置，若只考虑母线区内故障时流出母线的电流最多占总故障电流的20％，复式比率系数墨整定为( )最合适。
A．1： B．2： C．4。
22．BUS 1000母差保护的K值选取越大，允许流过差电流就越大，但差动保护的动作灵敏度将( )。
A．升高； B．不变； C．降低。
23．固定连接式母线保护在倒排操作时，I母发生故障，则母差保护跳( )。
A．I母； B．II母； C．I母和II母； D．拒动。
24．中阻抗型快速母差保护为保证区外故障时不误动，要求二次回路测量电阻Rm必须小于保护装置的稳定电阻R。
以下( )不是降低Rm的措施。
A．增大辅助电流互感器变比； B．增加电缆截面；C．增加差回路电阻； D．减少辅助电流互感器变比。
25．双母线差动保护的复合电压闭锁元件还要求闭锁每一断路器失灵保护，这一做法的原因是( )。
A．断路器失灵保护选择性能不好； B．防止断路器失灵保护误动；C．断路器失灵保护原理不完善。
26．母线电流差动保护采用电压闭锁元件主要是为了防止( )。
A．系统发生振荡时母线电流差动保护误动；B．区外发生故障时母线电流差动保护误动；C．由于误碰出1：3中间继电器而造成母线电流差动保护误动；D．TA断线时母线差动保护误动。
27．母线差动保护动作使纵联差动保护停信造成对侧跳闸，则按母线所属“对侧纵联”评价( )。
A．不予评价； B．拒动一次； C．正确动作一次；D．误动一次。
28．母线故障，母线差动保护动作，已跳开故障母线上六个断路器(包括母联)，还有一个断路器因其本身原因而拒跳，则母差保护按( )统计。
A．正确动作一次； B．拒动一次； C．不予评价；D．不正确动作一次。
29．所谓母线充电保护是指( )。
A．母线故障的后备保护；B．利用母联断路器给另一母线充电时的保护；C．利用母线上任一断路器给母线充电时的保护；’D．利用母联断路器给母线上任一断路器充电时的保护。
30．对于双母线接线方式的变电站，当某一连接元件发生故障且断路器拒动时，失灵保护应首先跳开( )。
A．拒动断路器所在母线上的所有断路器； B．母联断路器： C．故障元件的其他断路器。
31．双母线的电流差动保护，当故障发生在母联断路器与母联TA之间时出现动作死区，此时应该( )。
A．启动远方跳闸； B．启动母联失灵或死区保护；C．启动失灵保护及远方跳闸。
32．母线差动保护的暂态不平衡电流比稳态不平衡电流( )。
A．大； B．相等； C．小。
33．双母线接线的变电站，当母联断路器退出运行时，若一条母线故障。
对于母联电流相位比较式母差保护会( )。
A．仅选择元件动作； B．仅启动元件动作； C．启动元件和选择元件均动作。
34．双母线运行倒闸过程中会出现两个隔离开关同时闭合的情况，如果此时I母发生故障，母线保护应( )。
A．切除两条母线； B．切除I母； C．切除II母。
35．母线内部故障，PMH型快速母线保护整组动作时间不大于( )。
A．100ms： B．50ms； C．10ms。
36．断路器失灵保护断开母联断路器的动作延时应整定为( )aA．0．15～0．25s； B．0．3～O．5s； C．0．5s； D. ≥0 5s。
37．断路器失灵保护断开除母联或分段以外所有有电源支路的断路器的动作延时应整定为( )。
A．0．15～O．25s： B．0．3～0．5s； C．0.5～1s; D.≥0.5s。
38．220kV母线差动保护的电压闭锁元件中负序电压一般可整定为( )。
A．≤2V： B．4～8V； C．8～12V； D.2～4V39．110kV母线差动保护的电压闭锁元件中负序电压一般可整定为( )。
A．2～4V： B．4～8V； C．8～12V； D．≤2V。
40．220kV母线差动保护的电压闭锁元件中零序电压一般可整定为( )。
A．4～6V： B．4～8V； C．4～12V； D．≤4V。
41．110kV母线差动保护的电压闭锁元件中零序电压一般可整定为( )。
A．4～6V： B．4～8V； C．4～12V； D．≤4V。
42．母线差动保护的电压闭锁元件中低电压一般可整定为母线正常运行电压的( )。
A．50％～60％： B．60％～70％； C．70％～80％；D．≤50％。
43．母线差动保护的电压闭锁元件的灵敏系数与相应的电流启动元件的灵敏系数相比应( )。
A．低； B．相等； C．高。
44．母线差动保护中接于零序差回路的电流回路断线闭锁元件，其电流定值一般可整定为电流互感器额定电流的( )。
A．15％～20％： B．10％～15％； C．5％～10％；D．≤5％。
45．在220kV及以上变压器保护中，( )保护的出口不宜启动断路器失灵保护。
A．差动； B．瓦斯： C．220kV零序过流：D．中性点零流。
46．对220～500kV一个半断路器接线，每组母线应装设( )母线保护。
A．一套： B．二套； c．三套。
47．区内AB相间故障，母线保护动作出口应实现( )跳闸。
A．A相； B．B相； C．AB相； D．三相。
48．微机母线保护在系统使用不同变比电流互感器场合时，应( )。
A．修改程序； B．加装辅助TA； C．整定系数。
49．电流通道系数的设定原则为以所有单元中( )为基准进行折算。
A．最小变比； B．最大变比； c．相同变比数量最多的变比。
50．为更好地解决母联断路器热备用时发生死区问题，当母联断路器的动合辅助触点断开时，小差判据中( )母联电流。
A．计入： B．不计入； C．相同变比数量最多的变比。
51．差动保护判据中的差电流计算公式为：( )。
A．所有电流的绝对值之和； B．所有流出电流之和；C．所有流入电流之和； D．所有电流和的绝对值。
52．差动保护判据中的制动电流计算公式为：( )。
A．所有电流的绝对值之和； B．所有电流和的绝对值；C．所有流入电流之和； D．所有流出电流之和。
53．双母线分裂运行时，大差的制定系数：( )。
A．采用整定值： B．自动调整为O．3； C．自动调整为0．8； D．自动调整为0．6。
54．双母线系统中，当I母上隔离开关辅助触点出错，( )可能出现较大的差流。
A．I母小差； B．大差； c．I母小差和大差同时。
55．双母线母联电流的极性要求( )。
A．与II母上其他单元极性一致； B．与I母上其他单元极性一致；C．与母联电流的方向有关。
56．BP．2B母线保护通信接口方式为：( )。
A．两个RS-232／485串行接口； B．一个RS-232口，一个RS-485口；C．两个RS-485口； D．两个RS-232口。
57．BP．2B母线保护起动元件返回判据表达式为( )。
A．Id； B．Id <0.9 Idset： C．Id <0.8 Idset；D．Id <0.75Idset。
58．对BP-2B母线保护装置电压闭锁元件叙述正确的是( )。
A．低电压为母线相电压；零序电压为母线零序电压；负序电压为母线负序电压。
B．低电压为母线线电压；零序电压为母线三倍零序电压；负序电压为母线三倍负序电压。
C．低电压为母线线电压；零序电压为母线三倍零序电压；负序电压为母线负序电压。
D．低电压为母线相电压；零序电压为母线三倍零序电压；负序电压为母线三倍负序电压。
59．BP．2B母线保护装置对双母线各元件的极性定义为：( )。
A．母线上除母联外各元件的极性必须一致，母联极性同I母线上元件的极性；B．母线上除母联外各元件的极性必须一致，母联极性同II母线上元件的极性；C．母线上除母联外各元件的极性可以不一致，但母联正极性必须在II母线侧；D．母线上除母联外各元件的极性可以不一致，但母联正极性必须在I母线侧。