【判断题】
【判断】 交流高压真空接触器利用真空开关管熄灭电弧。 ()
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【判断】 电弧电流的本质是离子导电。 ()
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【判断】 弹簧储能操动机构的加热器只在断路器检修时使用。 ()
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【判断】 投入运行的断路器已有运行编号后 ,一般可不再标注断路器名称。 ()
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【判断】 断路器在合闸过程中 ,若继电保护装置不动作 ,自由脱扣机构也应可靠动作。 ()
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上而下绘制的接线图 ,称为安装图。 ()
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【判断】 中间继电器的作用之一是用于增加触点数量。 ()
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【判断】 重瓦斯动作后 ,跳开变压器高压侧断路器即可。 ()
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【判断】 对于接线方式较为简单的小容量变电所 ,操作电源常常采用蓄电池。 ()
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【判断】 能使继电器动合接点由断开状态到闭合状态的最小电流称为动作电流。 ()
【判断题】
【判断】 安装接线图是以屏面布置图为基础 ,以原理图为依据而绘制成的接线图 ,是一种指导屏柜上配线工作的图纸。 ()
【判断题】
【判断】 中小容量的高压电容器组普遍采用电流速断保护或延时电流速断保护作为相间短路保护。 ()
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【判断】 低电压继电器是反应电压下降到某一整定值及以下动断接点由断开状态到闭合状态的继电器。 ()
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【判断】 轻瓦斯动作后必须有自保持回路。 ()
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【判断】 远方对装置进行信号复归属于 110kV 及以下线路保护测控装置在信息方面的主要功能。 ()
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【判断】 信号继电器必须自保持。 ()
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【判断】 中间继电器用于增加触点数量和触点容量 ,具有动合接点和动断接点。 ()
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【判断】 零序保护能反映中性点直接接地变压器内部的各种接地故障。 ()
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【判断】 电流互感器可以将电力系统的一次大电流按一定的变比变换成二次较小电流,供给测量表计和继电器。 (
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【判断】 电能质量降低到不能允许的程度 ,不属于电力系统的事故。 ()
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【判断】 在靠近线路末端附近发生短路故障时 ,电流速断保护仍然能
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【判断】 油箱漏油造成油面降低属于变压器的异常。 ()
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【判断】 对备用电源自动投入装置 ,当工作母线电压消失时 ,备用电源应投入。 ()
【判断题】
【判断】 三相一次或二次重合闸属于 110kV 及以下线路保护测控装置在测控方面的主要功能。 ()
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【判断】 电容器组失压不属于高压电力电容器常见故障及异常运行状态。 ()
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【判断】 当电压互感器二次断线时 ,备自投装置不应动作。 ()
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【判断】 继电保护的可靠性是指发生了属于它该动作的故障,它能可靠动作 ; 而在不该动作时,它能可靠不动。 ()
【判断题】
【判断】 变压器正常运行时 ,理想状态是希望流入差动回路的差流为零。 ()
【判断题】
【判断】 对于高压电力线路 ,限时电流速断保护的动作时间一般取 1s。()
【判断题】
【判断】 电力线路电流速断保护是按躲过本线路末端最大短路电流来整定。 ()
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【判断】 变压器异常运行状态主要包括:保护范围外部短路引起的过电流,电动机自起动等原因所引起的过负荷、油浸变压器油箱漏油造成油面降低、轻微匝间短路等。()
【判断题】
【判断】 在靠近线路末端附近发生短路故障时 ,过电流保护能
【判断题】
【判断】 自动操作装置的作用是提高电力系统的供电可靠性和保证安全运行。 ()
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【判断】 在电缆牌和安装接线图上 ,只要注明电缆编号即可。 ()
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【判断】 热备用是备用电源自动投入的方式之一。 ()
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【判断】 限时电流速断保护可以保护线路全长。 ()
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【判断】 过负荷、频率降低、单相断线均属于电气设备故障。 ()
【判断题】
【判断】 对差动保护来说 ,变压器两侧的差动 CT 均应接成星型。 ()
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【判断】瓦斯保护的主要元件为气体继电器,将它安装在变压器油箱和油枕之间的联接管道中,并要注意使气体继电器上的箭头指向变压器本体一侧。()
【判断题】
【判断】 电力线路过电流保护的动作电流按躲过线路末端最大短路电流定。 ()
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Tom is a book lover. ______ likes reading very much.
A. He B. She C. You D. It
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—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
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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
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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
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5. I was looking for a birthday gift for my mother, but I couldnt find ______ suitable.
A. anything B. something C. nothing D. everything
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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
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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
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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
