【单选题】
【单选】 导体在磁场中做切割磁力线运动时 ,导体内就会产生 ___。A
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【单选题】
【单选】 线圈自身电流变化在线圈中产生的感应电动势称为 ___。A
A. 自感电动势
B. 互感电动势
C. 交变电动势
【单选题】
【单选】 电力系统过电压分成两大类 ___。A
A. 外部过电压和内部过电压
B. 外部过电压和大气过电压
C. 操作过电压和短路过电压
【单选题】
【单选】 下列关于阀型避雷器阀电阻片特性描述正确的是 ___。C
A. 正常电压时阀片电阻很小
B. 过电压时阀片电阻很大
C. 正常电压时阀片电阻很大
【单选题】
【单选】 金属氧化锌避雷器安装时 ,接地引下线应尽量 ___。C
【单选题】
【单选】 35~110kV 线路电缆进线段为三芯电缆时 ,避雷器接地端应与电缆金属外皮连接 ,其末端金属外皮应 ___。C
A. 对地绝缘
B. 经保护器接地
C. 直接接地
【单选题】
【单选】 架空线路装设自动重合闸装置后 ,可以 ___ 。B
A. 提高耐雷水平
B. 提高供电可靠性
C. 降低杆塔接地电阻
【单选题】
【单选】 10kV 变、配电所应在 ___上装设阀型避雷器。 C
A. 单组母线和每回路架空线路
B. 每组母线和单回路架空线路
C. 每组母线和每回路架空线路
【单选题】
【单选】 阀型避雷器阀电阻片具有 ___特性。 A
【单选题】
【单选】 对于需要频繁投切的高压电容器 ,为了防止断路器触头弹跳和重击穿引起操作过电压,有时需要并联 ___。 C
A. 管型避雷器
B. 阀型避雷器
C. 金属氧化物避雷器
D. 排气式避雷器
【单选题】
【单选】 在正常情况下 ,阀型避雷器中 ___。A
A. 无电流流过
B. 流过工作电流
C. 流过工频续流
【单选题】
【单选】 氧化锌避雷器的阀片电阻具有非线性特性 ,在 ___,其阻值很小 ,相当于“导通”状态。B
A. 正常工作电压作用下
B. 电压超过其起动值时
C. 冲击电压作用过去后
【单选题】
【单选】 电力系统中危及电气设备绝缘的电压升高即为 ___。C
A. 额定线电压
B. 系统最高电压
C. 过电压
【单选题】
【单选】 避雷器与被保护设备 ___ 连接。 C
【单选题】
【单选】 金属氧化性避雷器应 ___ 保管。 C
【单选题】
【单选】 拆除临时接地线的顺序是 ___。B
A. 先拆除接地端 ,后拆除设备导体部分
B. 先拆除设备导体部分 ,后拆除接地端
C. 同时拆除接地端和设备导体部分
【单选题】
【单选】 装设接地线必须 ___,而且接触必须良好。 B
A. 先接导体 (设备 )端,后接接地端 ,
B. 先接接地端 ,后接导体 (设备)端,
C. 先测接地电阻 ,再接接地端
【单选题】
【单选】 检修状态指设备的 ___, 而且接地线等安全措施均已做好 ,这时设备就处在检修状态。C
A. 开关已拉开
B. 操作电源已断开
C. 开关和刀闸均已拉开
【单选题】
【单选】 手车式开关柜 ,小车已推入 ,开关断开 ,称之为 ___。B
【单选题】
【单选】 设备的断路器 ,隔离开关都在合闸位置 ,说明设备处在 ___状态。 A
【单选题】
【单选】 在全部停电和部分停电的电气设备上工作时 ,必须完成的技术措施有 :停电、 ___、挂接地线、装设遮栏和悬挂标示牌。 B
【单选题】
【单选】 倒闸操作前 ,应先在 ___进行模拟操作。 B
A. 实际设备上
B. 模拟图板上
C. 操作票上
【单选题】
【单选】 在高压室内的二次接线和照明回路工作 ,需将高压设备停电或做安全措施时应使用___。A
A. 第一种工作票
B. 第二种工作票
C. 口头指令
【单选题】
【单选】 填写工作票时要字体规范 ,字迹清楚 ,不得涂改和不得用 ___笔填写。 C
【单选题】
【单选】 变配电所运行管理实行 ___制度。 C
A. “两票两制度”
B. “三票两制度”
C. “两票三制度”
【单选题】
【单选】 电气工作开始前 ,必须完成 ___A
A. 工作许可手续
B. 交接班手续
C. 工作间断手续
【单选题】
【单选】 装设临时接地线的顺序是 ___。A
A. 先接接地端 ,后接设备导体部分
B. 先接设备导体部分 ,后接接地端
C. 同时接接地端和设备导体部分
【单选题】
【单选】 如果线路上有人工作时 ,应在线路断路器和隔离开关的操作手把上悬挂 :___。A
A. 禁止合闸 ,线路有人工作
B. 止步,高压危险
C. 禁止攀登 ,高压危险
【单选题】
【单选】 电气设备由事故转为检修时 ,应 ___。A
A. 填写工作票
B. 直接检修
C. 汇报领导后进行检修
【单选题】
【单选】 操作票填写中 ,合上或拉开的隔离开关 ,刀开关统称为 ___。C
【单选题】
【单选】 在全部停电和部分停电的电气设备上工作时 ,必须完成的技术措施有 :___、验电、挂接地线、装设遮栏和悬挂标示牌。 C
【单选题】
【单选】 在全部停电和部分停电的电气设备上工作 ,必须完成的技术措施有 ___ 。A
A. 停电;验电 ;挂接地线 ;装设遮栏和悬挂标示牌
B. 停电;放电; 挂接地线 ;装设遮栏和悬挂标示牌
C. 停电;验电; 放电;装设遮栏和悬挂标示牌
【单选题】
【单选】 工作票应由 ___ 签发。 B
A. 工作负责人
B. 工作票签发人
C. 工作许可人
【单选题】
【单选】 电气设备有三种工作状态 ,即运行、备用、 ___。C
【单选题】
【单选】 在室内高压设备上工作 ,应在工作地点两旁间隔的遮栏上悬挂 :___。B
A. 禁止合闸 ,线路有人工作
B. 止步,高压危险
C. 禁止攀登 ,高压危险
【单选题】
【单选】 电源是将其他能量转换为 ___的装置。 C
【单选题】
【单选】 在电阻串联的电路中 ,电路的总电阻等于 ___ 。B
A. 各串联电阻之和的倒数
B. 各串联电阻之和
C. 各串联电阻的平均值
【单选题】
【单选】 两个电阻串联接入电路 ,当两个电阻阻值不相等时 ,则___。A
A. 两电阻的电流相等
B. 电阻小的电流小
C. 电阻大的电流大
【单选题】
【单选】 对变配电所内的电气设备、备用设备及继电保护自动装置等需定期进行 ___ 和轮换。B
【单选题】
【单选】 磁场中某点的磁感应强度 B 与磁导率？的比值 ,称为该点的 ___。 B
【单选题】
【单选】 在中性点经消弧线圈接地系统中 ,如果消弧线圈选择得当 ,可使接地点电流小于 ___,而不会产生断续电弧和过电压现象。 C
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【单选题】
Tom is a book lover. ______ likes reading very much.
A. He B. She C. You D. It
【单选题】
—May I listen to the music here, Mr. White?
—Sorry, you’d better it like that．
A. not to do B. not do to
C. dont do D. not do
【单选题】
3.—Did you have a good time at Lauras birthday party?
— Yes, indeed. Its several years ________ I enjoyed myself so much.
A. when B. before C. since D. that
【单选题】
4. —___________ is the Summer Palace from here?
About three kilometers away. You can take the No. 35 bus.
A. How long B. How far C. How often D. How much
【单选题】
5. I was looking for a birthday gift for my mother, but I couldnt find ______ suitable.
A. anything B. something C. nothing D. everything
【单选题】
6. A friend of my ____ and I are going to visit_______ next week．
A. father; Browns B. father's; Browns
C. father; the Browns D. father's; the Browns
【单选题】
7. She ______ very hard since she came to our school.
A. studies B. has studied C. is studying D. studied
【单选题】
8. — Who will send you to the new school, your mom or your dad?
— _______. Ill go there by myself.
A. Both B. Either C. Neither D. None
【单选题】
9.—Well do what we can ____English well this term．
—It’s high time for you to work hard．
A. study B．to study C. be studied D. be studying
【单选题】
10. —I’m going to Flower Bookstore. Could you tell me ______?
— Sorry, I don’t know. I’m new here.
A. where it is B. where was it C. where is it D. where it was
【单选题】
11. How do you like the dishes, Eric?
— Fantastic! Nothing tastes ________.
A. nice B. better C. terrible D. worse
【单选题】
12. ______ Lin Feng has to work late, she always wears a smile on her face.
A. Because B. If C. Until D. Though
【单选题】
13.You can save money _______ you buy cheaper things.
A. before B. unless C. if D. until
【单选题】
14. We will have a _________ holiday after the exam．
A. two-month B. two month’s C. two month D. two-months
【单选题】
15. —We will build an underground in Xuzhou before 2015．
— Wow, _______! Will it pass our place?
A. what an excited news B. how excited the news is
C. what exciting news D. how exciting
【单选题】
16. — Emily, here’s a dictionary．I hope it will help you in some way．
— Thank you．It’s ________ what I need．
A. almost B. still C. only D. just
【单选题】
17. —Oh．I’m hungry．Mum, can I have the hamburger on the plate?
—No．It tastes ．
A. terribly B. terrible C. good D. well
【单选题】
18. —We can invite our teachers to the farewell party next Saturday.
—Yes, ______? I’ll call them at once.
A. what for B. what C. why not D. why
【单选题】
19.You can ________ ask the old man to move away to any other place because he has lived ________ here for at least sixty years．
A. hardly; alone B. hard; alone
C. hardly; lonely D. hardly; lonely
【单选题】
20.—I’m going back to see my grandparents this weekend．
—________．
A. It’s very nice of you B. You’d better hurry
C. Say goodbye to them D. Give my best wishes to them
【单选题】
21.—Why not take ____ umbrella with the sign “Made in China”? It is useful.
—What _______ good advice it is!
A. an; a B. a; a C. an; \ D. \; a
【单选题】
22. —Do you know the boy________ is sitting next to Peter?
— Yes. He is Peter’s friend. They are celebrating his ________ birthday.
A. who; ninth B. that; ninth C. /; ninth D. which; ninth
【单选题】
23. It was dark, ______ I couldnt see what was happening.
A. or B. though C. but D. so
【单选题】
24.—You can use MSN to talk with Vivien on the Internet.
—I know. But can you tell me ________?
A. what I can use it B. when I can use it
C. why can I use it D. how can I use it
【单选题】
25. _______ are you going to the School Uniform Exhibition, Amy ?
To learn about different styles of school uniform.
A. What B. Where C. Which D. Why
【单选题】
( ) 26. Where does the writer of "The little Prince" come from?
A．England． B．France． C．America． D．China．
【单选题】
( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
C．He realizes his love for the rose and he goes back to his planet．
D．He discovers interesting things such as a snake, other roses and a fox
【单选题】
( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
A．the adult world B．the planet B -612
C．a rose and a fox D．the adventure of a young prince
【单选题】
( ) 29. What is the writer's main purpose（目的）in writing this passage？
A．To tell the readers his life story．
B．To tell people what kind of person his father was．
C．To tell the readers what present he got from his father．
D． To let people know how poor he was．
【单选题】
( ) 30. Why did the father not ask his son not to do this and do that？
A．Because he felt quite confident of his son．
B．Because he was born from a poor family．
C．Because he was a man of few words．
D．Because he didn't want to be much too strict with his son．
【单选题】
( ) 31. What would someone learn from this passage？
A．How to live by oneself． B．How to stand on one's own feet．
C．What a good father should do． D．What the self-important is like．
【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage？
A．闲暇时光 B．学费 C．精神空虚 D．经济不足
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her?
A. She had seven tickets.
B. She hoped to please others.
C. She knew the car drivers well.
D. She wanted to show kindness.
【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ .
A. thought it was beautifully written
B. wanted to know what it really meant
C. decided to write it on a warehouse wall
D. wanted her husband to put it up in the classroom
【单选题】
( ) 35. Who came up with the phrase according to the passage?
A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
【单选题】
( ) 36. What can we infer from the last paragraph?
A. People should practice random kindness to those in need.
B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
【单选题】
( ) 37.The greatest river for navigation is ___________.
A. the Nile B. the Amazon C. the Mekong D. the Mississippi
【单选题】
( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
C. irrigation and making electricity D. washing clothes
【单选题】
( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
C. chemicals and other materials D. people's building a dam across a river
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
C. Transportation D. Natural Resources
