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电力职称英语考试选择题讲解(最新)

电力职称英语考试选择题讲解(最新)
电力职称英语考试选择题讲解(最新)

电力英语考试选择题讲解

Section1

1. The orange is too high on the tree . It‘s out of my reach(伸出手).I need someone to help me.

2. The city is named after famous president. (这个城市是著名的总统名字命名的) named after 短语‖命名‖

3. It took millions of people several years to build the Great Wall.

4. I have always considered(考虑过的/认为) you my best friend.

5. If I take this medicine twice a day, it should cure (治愈)my cold.. 如果我服用此药一天两次就应该治愈我的感冒

6. It is considerate 考虑周到的of you to turn down the radio while your sister is still ill in bed. 这是体贴你调低收音机你的妹妹还在床上生病。

7. It‘s not quite certain 肯定that he will be present at the meeting. 这不是肯定的是他将出席会议

8. It was natural (自然)that he count(计算) the days before going home.

9. when she saw the clouds(乌去密布) she went back to house to fetch(取) her umbrella(伞).

10. The metals which we find in the earth include(包括) iron , lead and copper. 在我们地球上发现金属包括有铁铅和铜

11. Your hair needs to be cut(剪) ;would you like me to do it for you..

12. It was difficult难to guess猜测what her reaction反应to the news消息would be.

13. Contrary相反to your prediction预言, they lost the game..

14. We say that a person has good manners if he or she is polite , kind and helpful to others. 我们说一个人具有良好的风度如果他或她是有礼貌善良和乐于助人。

15. He is always kind , never cruel ,either to people or to animals. 他总是仁慈从来没有残忍不管是人或动物

16. we should be careful仔细when we are doing our exercises.练习

17. The tallest hat帽子would make him so tall that people would stop calling him a little man. 高顶帽子令他非常高大人们将停止称他是小个人。

18. Everyone seemed(似乎) to turn(变成) a blind(失明) eye to the rubbish (垃圾)on the floor. 每个人都似乎在地板上又视而不见垃圾

19. If you have a house full of children an rubbish垃圾, you will next keep it clean(清扫)

20. You are very lucky(幸运), because you have a chance(机会) to study at college(大学)

21. I was ashamed of 耻于when I lived生活.

22. Xiao wang always comes up with (提出)wonderful(极好) ideas.

23. Considering(考虑到) his age(年龄), he is unable to take the job.

24. It is impossible to know in advance(预先) what will happen.

25. Although尽管many young people are keen (热心,渴望)on going abroad(出国), he prefers(宁愿) to stay and work in his own country.

26. The doctor has warned(警告) time and again(屡次) that smoking will affect(影响) his health, but johny just won‘t listen

27. You‘d better最好have your cat repaired at once立刻, or you will be late for professor‘s 教授lecture演讲

28. This is the very house in which Mr.Zhou once 曾经lived居住.

29. The old photo ( reminded him of使..记起)his childhood儿童时代in the countryside农村

30. He slipped and broke his leg. As a result 因此he would have to away from school for two weeks. 他滑倒摔断了腿。因此他将不得不从学校离开了两个星期

Section2

1. Peter‘s latest book is so good that is beyond all praise赞美不尽彼得的最新著作是太好超越所有的赞扬

2. His failure to pay his debts confirmed证实their suspicion怀疑that he was not to be trusted. 他没有支付他的债务证实他们的怀疑他不值得信任

3. Sorry, I took your pen by mistake错误过失对不起我误拿了你的笔

4. The sisters differ in在…不同their interests兴趣.

5. I long for渴望an opportunity 机会of seeing you. 我渴望见到你一个机会

6. We have lessons every day except 除外on Sunday

7. Failure(失败) to communicate沟通resulted in导致the high divorce rate. 不沟通导致离婚率高

8. I am glad to have been given已获得a change改变to visit访问our country. 我很高兴能有更改访问贵国

9. Ruth finally最后managed达成to find what she was looking for露丝才找到她一直在寻找

10. The local 地方government政府will offer提供us what we need. 当地政府将为我们提供我们所需要的

11. The room became completely dark when the candle went out熄灭房间变得完全黑暗当蜡烛熄灭时

12. Pollution is said to cause使many people to suffer from患cancer癌. 污染是说令许多人患上癌症

13. The doctor said he would try his best to relieve减轻her of her pain痛苦.医生说他将尽最大努力以减轻她的痛苦

14. Do you enjoy reading about the adventures冒险of the great explorer伟大探险家in the African forests非洲丛林

15. It is impolite无礼to stare盯着at somebody or follow跟着him constantly不变地.这是不礼貌地盯着别人或者不断地跟他走

16. We entered the museum ,just to find只是为了找a shelter避难所from a shower阵雨. 我们走进博物馆只是为了找到避雨的所。

17. Baby-sitting保姆is part of an off-camp job. 保姆是场外阵营工作的一部分

18. Please speak loudly and clearly to make yourself heard and understood. 请大声说话显然使自己听到和理解。

19. Smallpox天花left留下lasting持久scars 疤痕on George Washington‘s nose and cheeks脸颊but most artists艺术家kindly亲切left out遗漏the pockmarks痘痕when painting画his portraits画像. 天花离开乔治华盛顿的鼻子和脸颊但大多数的艺术家请留下了凹坑时画的肖像持久的伤疤.

20. Handwriting is how you present现在yourself on paper.

21. It is a Japanese custom风俗\习惯to take off one‘s shoes before entering a house.

22. You may ask your teacher in case of difficulty在生活上遇到困难时你可能会问你的老师

23. The young girl made up her mind to get rid of摆脱her bad habit习惯. 这位年轻的姑娘下了决心摆脱她的坏习惯

24. It was in Greece希腊that Olympic competitions started.正是在希腊的奥林匹克竞赛开始

25. It seems似乎that his opinions看法are always different不同from his girl-friend. They don ‘t get along相处融洽well..

26. The price of houses is going up while that of cars has been brought down only to about 80 thousand yuan在房屋价格在不断攀升而汽车已降至仅约8.0万元

27. Milk easily goes bad in hot weather. You‘d better put it into the refrigerator冰箱

28. Mr. White was made chairman主席of the committee委员会, who was in charge of负责the project项目.

29. Her husband wasn‘t content with 满足于what he gained and wanted to get more. 她的丈夫并不满足于他所获得的并希望得到更多的

30. When Tom woke up he was in the hospital, but he didn‘t know how that had come about发生造成的. 当汤姆醒来时他在医院里但他不知道怎样发生的

Section3

1. John‘s sudden突然的death死亡was a great blow打击to his mother and it took her a long time to get over自……中恢复过来the grief悲痛.

2. Unless除非you go by依照nature自然, you are sure to be punished处罚by it.

3. His heart stopped beating跳动just when we reached the hospital.

4. –look! The flowers in the garden are growing成长lovely可爱. -How I wish I had a small piece of ground士地when I could plan打算some flowers of my own!

5. His parents couldn‘t get through打通to him on the telephone , so they decided决定to go to his school and see what‘s wrong.错误.

6. –Mum, why do you always make me drink a cup of fresh新鲜milk every day? To get为了enough足够protein蛋白质and nutrition营养as you are growing up成长.

7. Selecting选择a mobile移动phone for personal个人use is no easy task工作because technology科技is changing变化go rapidly迅速. 选择供个人使用的移动电话是不容易的因为技术迅速改变去

8. With the gas cut off , I couldn‘t cook dinner煤气切断我不能做饭

9. –Would you mind介意if I used your dictionary字典? -Go ahead继续

10. She took a glance一瞥,一眼at her watch and saw that it was already lunch time.

11. Grown-ups成年人should be responsible负责for their own behavior行为. 成年人应该对自己行为的负责

12. By improving改进his learning habits习惯a(n) average均分/平均水平student can be a top one.

13. When you meet with a problem, find a way to solve解答it.

14. The kitten小猫climbed爬the tree and couldn‘t get down下来

15. If you check检查your paper carefully , some grammar 语法mistakes错误can be avoided 避免.

16. The city Zhangjiakou was extensively广阔的damaged被损坏in the earth-quake地震

17. The case手提箱contained包含a lot of things, including包括a second-hand watch.二手手表

18. Do you enjoy listening to records录音? I find records are often as good as和…几乎一样or better than an actual真实performance演奏.

19. The high school graduated 毕了业300 students this summer夏季

20. –I suppose料想you have got the post职位. -You have guessed猜对it.

电力职称英语复习(字母顺序)

1、单项选择 A 1.Although many young people are B.keen on going abroad, he prefers to stay and work in his own country. 2.After my mother finished cleaning up the house, she C.went on read today’s newspaper. 3.After the lecture,the students participating in it had a B.heated discussion on it. 4.All those expensive shoes are made C.by hand. 5.Anybody who has broken the law won’t escape D.being punished. 6.As a result, he succeeded B.reaching the castle but failed B.to find the way to enter it. 7.Although her marriage was very unhappy, Mrs.Stephens remained with her husband for the B.sake of the children. 8.American blacks were D.denied equal rights with the whites until the 1970s after many years of hard struggle 9. A baby learns to C.creep before it learns to walk. 10.As a result of the neglect of all safety rules, the workers C.were exposed to considerable danger. 11. A good dictionary is D.indispensable to the study of a foreign language. 12. B.By way of an excuse he said he was tired. 13.As they crossed Broadway, he came D.face to face with a new problem. 14.After Tom passed his driving test he B.filled out an application for his driver’s license. B 1.By improving his learning habits a C.average student can be a top one. 2. A.Followed by his students, the teacher entered the classroom. 3.But, because Barbary is all that D.matters to me for the time, I don’t suggest going away. 4.Because he stammered slightly, the other boys D.made fun of him. C 1.Chinese brown medicine has little side C.effect. 2.Children are very curious D.by nature 3.Candidates who wish to D.withdraw from the examination must notify the secretary immediately. 4.“B.Enjoy yourselves, children,” Mother urged the guests at our party. D 1.Do you enjoy listening to records? I find records are often D.as good as or better than an actual performance. 2.Don’t eat anything that will spoil your appetite D.for dinner. E 1.Everyone seemed to B.warn a blind eye to the rubbish on the floor. 2.Einstein was mathematical A.genius. F 1.Fruit in best and cheapest when it is D.in season. 2. D.Far from admiring his paintings, I dislike them intensely. 3.First the curtain D.caught fire and then the bedclothes. H 1.He is always kind, never cruel, B.either to people B.or to animals. 2. A.considering his age, he is unable to take the job. 3.He slipped and broke his leg. A.As a result he would have to away from school for two weeks. 4.His heart stopped C.beating just when we reached the hospital. 5.His parents couldn’t A.get through to him on the telephone, so they decided to go to his school and see what’s wrong. 6.How is Mary getting on C.with her study? 7.His father is very busy ever day. He can’t help complaining of the rapid B.pace of modern life. 8.He is the best candidate D.to carry out the plan. 9.He hurried to the railway station A.in the hope of catching the early train. 10.–Have you D.heard about Mr.Johnson? ----Yes, I read about him in a newspaper. 11.How about D.staying at home if we meet with a stormy day? 12.His D.total income of a year is $500. His yearly income D.totals $500. It reached D.atotal of $500 a year. 13.Her deeds are worthy C.of being praised. 14.He said the situation there was not bad as had been A.painted. 15.He said it in such clear terms that nobody was in any A.doubt about what was meant. 16.His business is growing so fast that he must take B.on more workers. 17.He is the manager of the company. He’s D.ind charge of it. 18.He said he had every D.confidence in his secretary; she would do the right thing. 19.He is said to be generous D.with his money. 20.He considers himself a great singer, and A.in a way he is justified. 21.He restricts himself C.to smoking two cigarettes a day. 22.Harris turned a page to two and the title of a poem D.caught his eye. I 1.It C.took millions of people several years to build the Great Wall. 2.I have always B.considered you my best friend. 3.If I take this medicine twice a day, it should B.cure my cold 4.It is B.considerate of you to turn down the radio while your sister is still ill in bed. 5.It’s not quite C.certain that he will be present at the meeting. 6.It was natural that he A.count the days before going home. 7.It was difficult to guess what her B.reaction to the news would be. 8.If you have a house full of children and rubbish, you will next keep it B.clean. 9.I was ashamed C.of when I lived. 10.It is impossible to know A.in advance what will happen. 11.If you A.check your paper carefully, some grammar mistakes can be avoided. 12.–I suppose you have got the post.----You B.have guessed it. 13. A.To be honest, I didn’t agree with what you said. 14.It has been raining for a week. I hope C.it will clear up. 15.I’m going to have my car A.repaired tomorrow morning. 16.I D.heard her talking about Mrs.Handerson whom I had never D.heard of. 17.If Mary B.is aware of all the dangers, she should change her mind. 18.If you were in my position, you would B.have some idea how I feel. 19.I prefer A.staying at home to A.playing outside. 20.If a person is exposed to constant noise, he may gradually B.suffer from a loss of hearing. 21.If it wasn’t an accident, he must have done it on C.purpose. 22.It is forecast that heavy rains are D.threatening to flood the area in a few days. 23.In his boyhood, he was slow C.in learning to read and write. 24.I never expected you do D.turn up at the meeting; I thought you were abroad. 25.I couldn’t find A.a large enough coat, and so I took this one. 26.I tried to call you A.up last night, but no one answered the phone. 27.I had not even a vague idea D.of what was going to happen. 28.If this is the case, how is he B.justified in blaming her? 29.In the D.preface to this book, we are given the reason why it has been republished. 30.I A.disapproved of the way he behaved at the meeting 31.“I don’t see that I have deserved any fame and I have no C.taste for it,” he once said. 32.I didn’t expect that these few books would come C.to so much. 33.I speak B.for my colleagues as well as myself when I thank you all for your great kindness. 34.Industrial countries A.consume a great amount of raw materials. 35.It’s no use ringing me at the office this week because I’m D.on holiday. 36.“I’ve been away a long time, and that name is not familiar A.to me.” 37.It si encouraging to note that in recent years, cigarette smokers have been B.on the decline, especially among older people. 38.I must count D.up how much money I’ve spent today. 39.If George cannot earn money for a bicycle, he will have to C.do without. 40.If you can make C.friends with her, so much the better. J 1.John’s sudden death was a great blow to his mother and it took her a long time to D.get over the grief. 2.Jimmy is the oldest boy and is taller than B.any other boy in the class. 3.Jim threatened to take C.revenge on the shirt factory that had fired him. L 1.---look! The flowers in the garden are growing lovely.------ how I wish I had a small piece of D.ground when I could plant some flowers of my own! 2.Let me see all the official A.documents concerning the sale of this land. 3.Let’s begin the lesson at the place where we left A.off last time. 4.Libyan demonstrators C.set fire to the U.S. embassy in Tripoli. M 1.---Mum, why do you always make me drink a cup of fresh milk.-----B.To get enough protein and nutrition as you are growing up. 2.My brother was such a C.handsome young man that many girls like him. 3.Mary’s parents couldn’t help C.worrying about her. 4.My family bought a second-hand car B.at the price of 500 dollars. 5.Many people complain of the rapid C.pace of modern life. 6.“My mother asked C.after you.”“How kind of her!” 7.Mary was not promoted because she dreamed too much and fell C.behind in her lessons. 8.Mike thought that he could get B.by with the minimum of work. His tutor quickly disabused him! N 1.Nearly all weather occurs in the lowest layer of the A.atmosphere. 2.Never D.tuouble trouble until D.trouble troubles you. O 1.Only when the rain stopped C.did the sports meeting start again. 2.Once he decided what he wanted, he would go C.after in with a single mindedness. R 1.Remember to turn off the gas when you go C.on holiday. S 1.Selecting a mobile phone for personal use is no easy task because technology C.is changing go rapidly. 2.She took a A.glance at her watch and saw that it was already lunch time. 3. D. Grown-ups should be responsible for their own behavior. 4.She was caught spitting in public and fined ten yuan on the A.spot. 5.such customs were D.handed down from father to son. 6. B.Hundreds of students attended the party last night. 7.She A.held back, not knowing what to do or say. 8.She likes wearing D.boots at home, for they are very comfortable. 9.Since the boss of the department wasn’t in, we decided to have a meeting B.another day. 10.She changes her mind so A.constantly that no one wants to work with

国网电力职称英语模拟试题(三套,已排版)

模拟试题一 Part I.单选(45%) 1.There’s something wrong with the thermometer. Don’t worry . I’ll make it works 。 2.Now people can learn huge amounts of information from the computer。 3.The expert you saw at the liaison meeting is a friend of mine 。 4.You have worked more carefully this week, for there are few mistakes in your calculation 。 5.Although the three workers got very tired in repairing the boiler, none of them would give it up。 6.Now computers can work out problems much faster than human beings。 7.There is too much cream on the cake。 8.Don’t worry. It is not difficult for us to treat the fault。 9.Ms, Chang doesn’t look well today . What is wrong with her? 10.I’d like to lend you my electrical engineering handbook, but you’d better not lend it to others。 11.I think English is quite different from Chinese。 12.— Excuse me, is this the way to Shanghai power Company? —No, I’m afraid it isn’t 。You’ve got the wrong road。 13.—Can you tell me where Shanghai power Company is? —sure, go down the street and turn left at the first crossing。 14.My wife is always busy with the housework 。 15.Engineer Zhou has learned English for five years 。 16.It is true that light travels faster than sound 。 17.The old man was so exited that he could hardly believe his eyes. The underlined part means almost not 。 18.—How can I get to your office? —You can take a taxi instead of walking there 。 19.Technicians are interested in the interesting introduction of advanced technology 。 20.Would you mind me using your calculator for a while? 21.pumps are widely used in coal-fired power plant to transport carious liquids 。 22.The thermocouple thermometers are used for temperature measurement 。 23.When we run a plastic comb through our dry hair the comb and the hair may have static electricity 。 24.Do not touch anything that runs electricity with your wet hands。 25.The sun is one of thousands of stars in the sky。 26.The equipment in substations protecting against direct thunder strikes is called lightning arrestor 。 27.The power transformer is used to change the voltage of the power grid for the purpose of power transmission 。 28.According to distribution equipment location ,it can be divided into indoor power distribution equipment and outdoor ones 。 29.The control panel of the steam turbine must be kept clean every day 。 30.In respect of environment protection the emission of dust, NO×,SO× etc must be limited。 Part II. 判断(15%) The Earth The earth is the home for us all. The earth turns round itself once every day, that’s why some people see sunrise and others see sunset at the same time。

国家电网管理类考试机试笔试专用题库历年考试真题

国家电网招聘考试笔试真题复习资料 考试形式: 从2013年开始,国家电网的校园招聘就采用“全国统考”的形式了,考试方式为“上机考试”,但是考试题都是客观题(选择和判断),预计未来也绝对不会有主观题了。 考试题型: 总共是155道题 其中专业部分: 单选50 多选25 判断25道题。 其他是55道是综合能力测试占35分。 考试题型基本就这样了,建议报考的同学做好复习准备,考试复习资料可以到资料网上面找一下,里面的资料还是非常齐全、详细的,比较有针对性!考试范围: 国家电网采取分专业统考的方式,所有专业都考行测+电网战略+企业文化+专业,其中其它专业类只考综合能力测试(行测+电网战略+企业文化),电网战略和企业文化是考试新加入的考点,各专业的重点科目如下(电网的大纲在官网上给出来了,所以我这里也就大致说下,不赘述); 1)电气专业:分为研究生、本科、专科,研究生重点为:电路原理、电力系统分析、电网络分析、高等电力系统分析;本科、专科重点为:电路原理、继电保护、电力系统分析、高电压技术; 2)计算机专业:重点科目为组成原理、操作系统、网络、数据库、数据结构; 3)电信通信专业:重点科目为电磁、通信原理、信号、计算机通信与网络、现代交换、宽带接入、数字传输等; 4)财务会计专业:重点科目为成本会计、财务管理、审计、税法等; 5)管理专业:管理专业是比较特殊的,因为今年的大纲并未给出具体的科

目,但是报名的时候还是给了2个方向,一个是人力资源管理,一个是技术经济管理(工程管理),重点要看好人力资源管理体系、薪酬管理、绩效管理、电力市场营销管理、管理统筹和现代管理等; 考试复习方法: 建议按照以下步骤复习: 1、走马观花看一遍知识点,了解大概的重点内容,让自己能大概蒙对题目; 2、做各知识点附带的练习题,把握出题的方向和方式; 3、认真细致的抠字眼式的看每一个知识点,熟练掌握知识; 4、做题海题库练习题,把握考试的重点知识分布; 5、对重点薄弱项目再看知识点; 考试大纲: 1.综合能力(35%)

国网电力职称英语阅读理解(已排版)

Passage 1 Have you ever seen a moon that looks unbelievably big? 1.To what do we compare the size of the harvest moon? (all of these) 2.The main purpose of the article is to inform. 3.The author knew most people find the moon mysterious. 4.The moon looks bigger if it is near the horizon 5.The autumn moon helps farmers see as they harvest their crops. Passage 2 Strange thing happens to time when you travel. 1.The best title for this selection is How Time Changes Around the World. 2.The difference in time between zones is one hour. 3.From this selection it seems true that the Atlantic Ocean is divided into five time zones. 4.The international date line is the name for the point where a new day begins. 5.If you cross the ocean going east, you set you clock ahead one hour in each new time zone. Passage 3 Holidays in the United States usually occur at least once a month. 1.The government of the United States makes it a rule for workers to have a 3-day weekend almost once a month. 2.Workers in the United States sometimes work from Tuesday to Sunday. 3.Which statement is NOT true according to this passage? All the workers have a half-month vacation. 4.The reason why someone has to divide his vacation into several parts is that no one can be found to take his place . 5.Which of the following is the best title for this passage? Something about the holidays and Vacation in the U.S. Passage 4 Sarah Winchester was a very rich woman. 1.What did Sarah keep doing to her house? Making it bigger. 2.The story says that Sarah?s house had floors. 3.Who did the work on Sarah?s house? Carpenters and plumbers and other workers. 4.How long did the work on the house continue? For 38 years. 5.Sarah?s house was finally finished when she died. Passage 5 The diner is only a humble restaurant, but it has a special place in American life. 1.What?s the main idea of paragraph 2? The attraction of different people. 2.The purpose of the last paragraph is to give a summary of the whole passage. 3.Why do truck drivers like a diner?It’s a haven against loneliness. 4.Diners attract many different kinds of people. 5.Diners are fascinating. Passage 6 In the past two years, millions of Americans have suddenly embraced the bicycles as 1.The word “embrace” in the first sentence is closest in meaning to make use of. 2.It can be concluded that if people continue to concern themselves with air pollution and physical fitness, bicycle sales will continue to rise. 3.The bicycle is enjoying a strong revival. 4.The reader can also conclude that Americans are concerned with the quality of their lives . 5.In the sentence “…and this isn?t America?s first bicycle boom.” The word “boom” means a rapid increase in sale.

注电考试最新版教材-第62讲 第三十二章简单电力网络的潮流计算

32.1.1.2 输电线路的功率损耗 电力线路的功率损耗计算 设末端电压为? 2U 末端功率为 则末端导纳支路的功率2y S ?为 图片 1 阻抗支路末端的功率为 阻抗支路中始端的功率为 始端导纳支路的功率 始端功率 为 32.1.2 变压器的电压降落和功率损耗 32.1.2.1 变压器的电压降落 32.1.2.2 变压器中的功率损耗

(1)串联支路的功率损耗 (2)并联支路的功率损耗 注意:变压器励磁支路的无功功率与线路支路的无功功率符号相反 32.2 简单电力系统的潮流计算 (1)已知同一端的功率和电压,求另一端功率和电压;方法为从已知功率、电压端,齐头并进逐段求解功率和电压,如下图所示 求解方法: (1)设所有未知电压节点的电压为线路额定电压,从已知功率端开始逐段求功率,直到推得已知电压点得功率; (2)从已知电压点开始,用推得的功率和已知电压点的电压,往回逐段向未

知电压点求电压。 32.2.1 已知末端功率和电压 计算步骤: 变压器阻抗上的功率损耗:)(~222T T f f f TZ jX R U Q P S ++=? TZ f S S S ~~~'2 ?+= 变压器阻抗上的电压损失(忽略U δ): f T f T f T U X Q R P U +=? T f U U U ?+=??2 变压器导纳支路上的功率损耗:)(~22T T TY jB G U S +=? TY S S S ~~~'2''2?+= 线路末端导纳支路上的功率损耗: 2~222l LY B jU S -=? 2''2''~~~LY L S S S ?+= 线路阻抗上的功率损耗:)(~222''2''L L L L LZ jX R U Q P S ++=? LZ L L S S S ~~~'''?+= 线路阻抗上的电压损失:2''''U X Q R P U L L L L L +=? L U U U ?+=? ?21 线路首端导纳上的功率损耗: 2~211l LY B jU S -=? 1'1 ~~~LY L S S S ?+= 与上述过程类似,可由? 1U 和1~S 推出f S ~和?f U 。 32.2.2 已知末端功率和始端电压 1 .迭代法

职称英语、计算机新规定

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国家电网考试试题

国家电网考试试题

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