阅读理解 1.Wind energy has numerous benefits (1)T he reason for[d.run out] (2)W hy is wind[d.produce pollution] (3)W hich of the following statements[c.remote locations] (4)W hich of the following is one[a.lower maintenance] (5)T he cost of[c.maintanin wind] 2.Strange thing happens to time (1)T he best title[b.the world] (2)T he difference[c.one hour] (3)F orm this[c.time zones] (4)T he international[c.day begins] (5)I f you cross[a.twenty-three hours] 3.As a clean and renewable energy (1)W hat’s the feature[c.energy source] (2)B efore installing[a.to be done] (3)A ccording to the[b.cell phone masts] (4)W hich of following is[d.noise pollution] (5)W hich of the following statements[a.wind turbines] 4.Doctors have known for (1)D octors have[c.loud noise] (2)T his passage[b.will be….more than one second]
1、什么是动力系统、电力系统、电力网？(电力系统分析) 答:通常把发电企业的动力设施、设备和发电、输电、变电、配电、用电设备及相应的辅助系统组成的电能热能生产、输送、分配、使用的统一整体称为动力系统； 把由发电、输电、变电、配电、用电设备及相应的辅助系统组成的电能生产、输送、分配、使用的统一整体称为电力系统；把由输电、变电、配电设备及相应的辅助系统组成的联系发电与用电的统一整体称为电力网。2、现代电网有哪些特点? 答:1、由较强的超高压系统构成主网架。2、各电网之间联系较强,电压等级相对简化。 3、具有足够的调峰、调频、调压容量,能够实现自动发电控制,有较高的供电可靠性。 4、具有相应的安全稳定控制系统,高度自动化的监控系统和高度现代化的通信系统。 5、具有适应电力市场运营的技术支持系统,有利于合理利用能源。3、区域电网互联的意义与作用是什么? 答：1、可以合理利用能源,加强环境保护,有利于电力工业的可持续发展。 2、可安装大容量、高效能火电机组、水电机组和核电机组,有利于降低造价,节约能源,加快电力建设速度。 3、可以利用时差、温差,错开用电高峰,利用各地区用电的非同时性进行负荷调整,减少备用容量和装机容量。 4、可以在各地区之间互供电力、互通有无、互为备用,可减少事故备用容量,增强抵御事故能力,提高电网安全水平和供电可靠性。 5、能承受较大的冲击负荷,有利于改善电能质量。 6、可以跨流域调节水电,并在更大范围内进行水火电经济调度,取得更大的经济效益。4、电网无功补偿的原则是什么? 答:电网无功补偿的原则是电网无功补偿应基本上按分层分区和就地平衡原则考虑,并应能随负荷或电压进行调整,保证系统各枢纽点的电压在正常和事故后均能满足规定的要求,避免经长距离线路或多级变压器传送无功功率。5、简述电力系统电压特性与频率特性的区别是什么? 答：电力系统的频率特性取决于负荷的频率特性和发电机的频率特性(负荷随频率的变化而变化的特性叫负荷的频率特性。发电机组的出力随频率的变化而变化的特性叫发电机的频率特性）,它是由系统的有功负荷平衡决定的,且与网络结构(网络阻抗）关系不大。在非振荡情况下,同一电力系统的稳态频率是相同的。因此,系统频率可以集中调整控制。 电力系统的电压特性与电力系统的频率特性则不相同。电力系统各节点的电压通常情况下是不完全相同的,主要取决于各区的有功和无功供需平衡情况,也与网络结构(网络阻抗）有较大关系。因此,电压不能全网集中统一调整,只能分区调整控制。6、什么是系统电压监测点、中枢点？有何区别？电压中枢点一般如何选择? 答:监测电力系统电压值和考核电压质量的节点,称为电压监测点。电力系统中重要的电压支撑节点称为电压中枢点。因此,电压中枢点一定是电压监测点,而电压监测点却不一定是电压中枢点。
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%)
国家电网公司电力英语水平考试辅导书阅读理 解答案总结 集团文件版本号：（M928-T898-M248-WU2669-I2896-DQ586-M1988）
阅读理解 1.Wind energy has numerous benefits (1)The reason for[d.run out] (2)Why is wind[d.produce pollution] (3)Which of the following statements[c.remote locations] (4)Which of the following is one[a.lower maintenance] (5)The cost of[c.maintanin wind] 2.Strange thing happens to time (1)The best title[b.the world] (2)The difference[c.one hour] (3)Form this[c.time zones] (4)The international[c.day begins] (5)If you cross[a.twenty-three hours] 3.As a clean and renewable energy (1)What’s the feature[c.energy source] (2)Before installing[a.to be done] (3)According to the[b.cell phone masts] (4)Which of following is[d.noise pollution] (5)Which of the following statements[a.wind turbines] 4.Doctors have known for (1)Doctors have[c.loud noise] (2)This passage[b.will be….more than one second]
2019国家电网校园招聘题库参考—现代电力系统分析 2019国家电网校园招聘尚未开始，预计将于2018年11月份开始招聘，每年招聘两批，总人数超过两万人。今天中公电网小编给大家整理一下备考2019国家电网笔试的试题资料，帮助大家备考。 1、电力系统暂态稳定分析用的逐步积分法是( ) A、时域仿真法 B、直接法 C、频域法 D、暂态能量函数法 2、( )是一个多约束的非线性方程组问题，采用牛顿法和基于线性规划原理处理函数不等式约束的方法。 A、状态估计 B、网络拓扑 C、最优潮流 D、静态安全分析 3、电力系统( )就是利用实时量测系统的冗余性，应用估计算法来检测和剔除坏数据。其作用是提高数据精度及保持数据的前后一致性，为网络提供可信的实时潮流数据。 A、网络拓扑 B、状态估计 C、静态安全分析 D、调度员潮流
4、稳定计算的数学模型是一组( )方程 A、代数 B、微分 C、长微分 D、其它三个选项都不是 5、离线计算主要应用范围( ) A、规划设计 B、运行方式分析 C、为暂态分析提供基础数据 D、安全监控 6、柔性交流输电可实现的功能是( ) A、控制潮流 B、远程调用 C、增加电网安全稳定性 D、提高电网输送容量 7、电力系统潮流计算出现病态的条件是( ) A、线路重载 B、负电抗支路 C、较长的辐射形线路 D、线路节点存在高抗 8、最优潮流常见目标函数( )
A、总费用 B、有功网损 C、控制设备调节量最小 D、投资及年运行费用之和最小 E、偏移量最小 9、静态不安全的判断准则( ) A、频率失稳 B、电压失稳 C、电压越限 D、发电机不能同步运行 10、属于分布式发电的有( ) A、建筑一体化光伏 B、大型风电厂 C、小型光伏 D、小型风电厂 11、微电网的常态运行方式有( ) A、独立运行模式 B、正常运行模式 C、联网运行模式 D、不正常运行
国家电网考试试题
1、（D）没有专门的灭弧装置，它不能带负荷关合或拉开。A 负荷开关 B 断路器 C 自动开关 D 隔离开关 2、（A）类缺陷为紧急缺陷，使设备不能继续运行，必须立即处理。A I类 B II 类 C III 类 3、用做保护接地线或保护接中性线的绝缘导线的颜色为（C）A 黑色 B 淡蓝色 C 绿/黄双色线 4、高压导线断落地面，救护人员要进入距落地点8-10米范围内抢救触电者救护人员必须（E）. A 快步进入 B 戴绝缘手套 C 小步迈 进 D 戴安全帽 E 穿绝缘靴、双脚并拢、稳步跃进 5、在拉、拽、搬动触电者时，应（D），使触电者脱离电源。 A 用金属或潮湿的物品做工具 B 赤手迅速动作 C 可触及触电者的皮肤或其贴身衣 服 D 用干燥、绝缘的木棒、竹竿、衣物、手套和绳索
6、人站在干燥的木梯上带电安装灯具，为了站稳，可以一手安装，另一手（C） A 也不能扶墙 B 可扶墙 C 可戴绝缘手套扶墙 7、高压设备接地，室内不得接近接地点（E）以内A 20米 B 10米 C 80米 D 6 米 E 4米 8、围绕计费电能表窃电，窃电量按（B）计算。 A 窃电者用电设备容量*窃电时间 B 计费电能表标定电流值所指的容量*窃电时间 9、窃电时间无法查明，则每日窃电时间，动力用户按（D）计算。 A 4H B 6H C 8H D 12H E 24H 10、发、供电设备容量是按系统最大负荷需求量安排的，它对应电力成本中的容量成本，是以（C）计算基本电费。 A 用户实际用电量 B 用户实际用电量/功 率因数 C 用户用电的最高需求量或变压器容量
2021国家电网校园招聘电力系统分析试题 一、填空题 1.降压变压器高压侧的主分接头电压为220kv，若选择+2× 2.5%的分接头，则该分接头电压为。 2.电力系统中性点有效接地方式指的是。 3.输电线路的电气参数包括电抗、电导、电纳和。 4.输电线路的电压偏移是指线路始端或末端母线的实际运动电压与线路的数值差。 5.电力系统的潮流分布一般是用各节点的电压和表示。 6.调整发电机组输出的有功功率用来调整电力系统运动的。 7.复合故障一般是指某一时刻在电力系统发生故障。 8.用对称分量法计算不对称故障，当三相阻抗完全对称时，则其序阻抗矩阵Zsc的非对角元素为。 9.系统中发生单相接地短路时故障点短路电流的大小是零序电流的倍。 10.减小输出电元件的电抗将系统的静态稳定性。 二、单项选择题 11.同步发电机的转速和系统频率之间是否有严格的关系( ) ①否②是③不一定④根据发电机的形式定 12.三绕组变压器的结构、通常将高压绕组放在( ) ①内层②中间层③外层④独立
设置 13.中性点以消弧线圈接地的电力系统，通常采用的补偿方式是( ) ①全补偿②欠补偿③过补偿④有时全补偿，有时欠补偿 14.三相导线的几何均距越大，则导线的电抗( ) ①越大②越小③不变④无法确定 15.变压器的电导参数GT，主要决定于哪一个实验数据( ) ①△PO ②△PK ③UK% ④IO% 17.环网中功率的自然分布是( ) ①与电阻成正比分布②与电抗成正比分布 ③与阻抗成正比分布④与阻抗成反比分布 18.电力系统中PQ节点的数量( ) ①全都是②大量的③少量的④必有且一般只设一个 20.在同一时间内，电力网的电能损耗与供电量之比的百分值称为( ) ①负载率②网损率③供电率④厂用电率 21.电力系统的频率主要决定于( ) ①有功功率的平衡②无功功率的平衡 ③电压质量④电流的大小
阅读理解 "body clocks"are biological methods……； 1. one can help； 2. possible illnesses； 3. our body…； 4. at night； 5. every hour in the day time； A friend of mine,in response to……；1. like his friend,he； 2. make us know it's； 3. it's nice to accept the； 4. life isn't and won't be fair； 5. positive； A new technology is going to……；1. is still under development； 2. it is being cultivated……； 3. Dramatic； 4. Asian scientists gain……； 5. Superconductivity:……； A properly designed…； 1. produce ； 2. It will cut 3. To supply； 4. the electrical； 5.It cuts； A smart grid……； 1. Their； 2. customers； 3. They can provide ； 4 To manange their energy； 5. Introduction； All the useful energy……；1. atomic power ； 2. plants ； 3. water ； 4. absorbed by the earth's ； 5. a very small portion ；As a clean and renewable energy…； 1.It is not a constant； 2.a site survey； 3.cell phone masts； 4.Noise pollution； 5.Not all the people；As we have seen,……； 1. removing； 2. good health； 3. is free； 4. to strive； 5. people who try； Business Development(BD).……；1. To create long-term；2. Because a company relies；3. The coach has；4. It should set up clear；5. Business development；
2019国家电网电力系统分析笔试题2 湖北国家电网招聘笔试即将来临，接下来就要耐心等待招聘笔试的公告发布啦!对于没有笔试经验的同学来说一定是没有头绪的，中公国企小编在这里整理了有关湖北国家电网招聘笔试的各类习题，大家可以来参考一下，满满的都是干货哦！试题内容/详情如下： ★何谓潜供电流?它对重合闸有何影响?如何防止? 【中公解析】 当故障线路故障相自两侧切除后,非故障相与断开相之间存在的电容耦合和电感耦合,继续向故障相提供的电流称为潜供电流。由于潜供电流存在,对故障点灭弧产生影响,使短路时弧光通道去游离受到严重阻碍,而自动重合闸只有在故障点电弧熄灭且绝。 缘强度恢复以后才有可能重合成功。潜供电流值较大时,故障点熄弧时间较长,将使重合闸重合失败。 为了减小潜供电流,提高重合闸重合成功率,一方面可采取减小潜供电流的 措施:如对500kV中长线路高压并联电抗器中性点加小电抗、短时在线路两侧投入快速单相接地开关等措施;另一方面可采用实测熄弧时间来整定重合闸时间。 ★什么叫电力系统理论线损和管理线损? 【中公解析】 理论线损是在输送和分配电能过程中无法避免的损失,是由当时电力网的负荷情况和供电设备的参数决定的,这部分损失可以通过理论计算得出。管理线损是电力网实际运行中的其他损失和各种不明损失。例如由于用户电能表有误差,使电能表的读数偏小;对用户电能表的读数漏抄、错算,带电设备绝缘不良而漏电,以及无电能表用电和窃电等所损失的电量。 ★什么叫自然功率? 【中公解析】 运行中的输电线路既能产生无功功率(由于分布电容)又消耗无功功率(由于串联阻抗)。当线路中输送某一数值的有功功率时,线路上的这两种无功功率恰好能相互平衡,这个有功功率的数值叫做线路的"自然功率"或"波阻抗功率"。
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。