【单选题】
接触网断线时，在未接地线前，任何人不得进入 （ )范围内。 ___
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相关试题
【单选题】
设备在安装，工具、材料、配件的堆放，必须与电气化有关设备隔开 ( )米以上距离。 ___
【单选题】
人体安全电压应小于 ( ) 。 ___
A. 36V
B. 40V
C. 45V
D. 60V
【单选题】
通过人体安全电流是 ( ) 。 ___
A. 50mA
B. 60mA
C. 80mA
D. 1A
【单选题】
电气化铁路是由 ( )组成。 ___
A. 接触网和牵引变电所
B. 接触网和电力机车
C. 电力机车和牵引供电系统
D. 牵引变电所和电力机车
【单选题】
用沙土扑灭距接触网带电部份 ( )以内的燃着物时，接触网必须停电。 ___
A. 不足1米
B. 不足2米
C. 不足4米
D. 4米以上
【单选题】
人体电阻一般在 ( )之间。 ___
A. 200Ω~500Ω
B. 500Ω~800Ω
C. 800Ω~1MΩ
D. 1MΩ~5MΩ
【单选题】
我国在某些特殊场合规定 ( )V为安全电压。 ___
【单选题】
汽车通过平交道口时，货物载高度（从地面算起）不得超过 ( )米。 ___
A. 2.2
B. 3.2
C. 10
D. 15
【单选题】
在接触网支柱及接触网带电部分 ( )米范围内的金属结构上均需装设接地线。 ___
【单选题】
二氧化碳（干粉）灭火器适用扑灭 ( )V以下的各种电器火灾。 ___
A. 220
B. 380
C. 500
D. 600
【单选题】
接触网断线未停电、接地线前，任何人不得进入距断线接地点（ ）范围内。 ___
A. 8米
B. 10米
C. 15米
D. 20米
【单选题】
高压是指正确地电压在（ ）。 ___
A. 220V以上
B. 250V以上
C. 380V以上
D. 25KV以上
【单选题】
列检设备在安装，工具、材料、配件的堆放，必须与电气化有关设备隔开（ ）以上距离。 ___
【单选题】
人体安全电压是（ ）。 ___
A. 36V
B. 45V
C. 50V
D. 60V
【单选题】
电气化区段，除专业人员按规定作业外，任何人员所携带的物件（包括长杆导线等）与接触网设备及带电部分需保持（ ）以上距离。 ___
【单选题】
接触网最高电压是（ ）。 ___
A. 25KV
B. 27.5KV
C. 29KV
D. 35KV
【单选题】
接触网额定电压是（ ）。 ___
A. 15KV
B. 20KV
C. 25KV
D. 30KV
【单选题】
人体安全电流是（ ）。 ___
A. 1A
B. 50mA
C. 5A
D. 10A
【单选题】
用沙土扑灭距接触网带电部份（ ）的燃着物时，接触网必须停电。 ___
A. 不足2m
B. 不足4m
C. 8m
D. 10m
【单选题】
发生高压正确地故障时，在切断电源前，任何人与接地点的距离，室外不得小于（ ）。 ___
A. 4m
B. 8m
C. 10m
D. 15m
【单选题】
电力系统输送给牵引变电所的电压是（ ）。 ___
A. 110KV或220KV
B. 10KV
C. 27.5KV
D. 25KV
【单选题】
在接触网支柱及接触网带电部份（ ）范围内的金属结构物上均需装设接地线。 ___
A. 4m
B. 4.2m
C. 4.5m
D. 5m
【单选题】
电气化铁路由（ ）组成。 ___
A. 接触网和牵引变电所
B. 接触网和电力机车
C. 电力机车和牵引供电系统
D. 牵引变电所和电力机车
【单选题】
隔离开关的操作机构应安设在支柱距地面（ ）高度处。 ___
A. 2m
B. 1.5m
C. 0.8m
D. 1.1m
【单选题】
隔离开关不能带负荷进行分合闸的主要原因是（ ）。 ___
A. 无法实现分合闸
B. 损坏设备
C. 操作人员有触电的危险
D. 隔离开关无灭弧装置
【单选题】
高速铁路接触网导线距轨面高度一般在（ ）米左右。 ___
A. 4.5
B. 5.3
C. 6
D. 6.5
【单选题】
接地杆的耐压等级是（ ）。 ___
A. 35KV
B. 25KV
C. 20KV
D. 17.5KV
【单选题】
隔离开关的开关瓷柱的转动应灵活，转动角度为（ ）度。 ___
A. 90
B. 120
C. 135
D. 180
【单选题】
隔离开关开闭作业时，必须有（ ）在场，才能进行操作和监护。 ___
【单选题】
动车组运行方向尾部司机室头灯向后显示（ ）灯光。 ___
【单选题】
动车组二等座车的车种代码是（ ）。 ___
【单选题】
动车组进行无电作业前，②号位需确认动车组已断电降弓并报告①号，由（ ）申请接触网断电。 ___
【单选题】
CRH2A统型动车组的编组是（ ）。 ___
A. 四动四拖
B. 五动三拖
C. 六动二拖
D. 三动五拖
【单选题】
动车组由（ ）统一管理、统一配属、统一调配。 ___
A. 运用所
B. 车辆（动车）段
C. 铁路局
D. 铁总
【单选题】
动车组无电检查作业前需确认接触网断电，（ ）可靠插设。 ___
A. 禁动牌、止轮器、接地杆
B. 禁动牌、防护号志
C. 防护号志、止轮器、接地杆、禁动牌、防护号志、止轮器
【单选题】
从停留车辆的端部横过线路时，徒手通过应不少于1.5米。（） ___
【单选题】
登高作业使用梯子时，梯子与地面的倾斜度为45度左右。 ( ) ___
【单选题】
严禁私接电源线，机械设备的电气部分发生故障时，应立即关闭电源开关。 ( ) ___
【单选题】
移动照明电压超过36伏，灯泡应有防护装置。( ) ___
推荐试题
【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
【单选题】
1.—Hello! This is Henry Speaking．I’d like to speak to your father．
—Sorry, he has Shanghai．
A. been in B. been to C. come to D. gone to
【单选题】
2. — It’s difficult for the village children to cross the river for school．
— I think a bridge ______ over the river．
A. was built B. is being built C. has been built D. should be built
【单选题】
3. —Where would you like to go, Jinan or Qufu?
— ．I only want to go to Qingdao．
A. Each B. Either C. Neither D. All
【单选题】
4. — The documentary A Bite Of China II is quite popular around China recently. How do you like it? — ______.
A. I think so B. Pretty good C. It’s my pleasure D. All right
【单选题】
5. There are three English-books on the shelf, but ______ of them is mine.
A. both B. neither C.all D. none
【单选题】
6. When the parents arrived at the hall, the students _______ their projects.
A. have finish B. finished C. had finished D. are finishing
【单选题】
7. This week, the _______ seems to change every day: one day is hot; the next day is cold.
A. time B. weather C. season D. way
【单选题】
8. He never does his work _______ Mary.
A. as careful as B. so careful as C. carefully as D. as carefully as
【单选题】
9. — Can he jump high?
— Yes, he ______. He is a good high jumper.
A. must B. need C. can D. shall
【单选题】
10. The shop _____ at 8:00 a．m．and it ________ for ten hours every day．
A. is open; has opened B. is opened; opens
C. opens; is open D. opened; opens
【单选题】
11. —Excuse me, may I use your bicycle? ______ is broken.
—Certainly. But remember to return it before lunch.
A. Mine B. Me C. Myself D. I
【单选题】
12. —Simon, what do I need to take for the hiking?
—You’d better ________ more water than usual. It’s hot today.
A. to take B. taking C. take D. took
【单选题】
13. Helen ______ to a language school when she was seven.
A. sent B. is sent C. will send D. was sent
【单选题】
14. — Is this park you’ve visited recently?
— Yes, it's the most beautiful one I’ve ever visited before.
A. that B. the one C. which D. the one which
【单选题】
15. — It’s difficult for the village children to cross the river for school.
— I think a bridge ________ over the river.
A. should be built B. is being built C. has been built D. was built
【单选题】
16. — Could you tell me when Mr. Li ________ in Huaibei?
— Sure．．When he ________, I’ll call you．
A. arrives; will arrive B. will arrive; will arrive
C. arrives; arrives D. will arrive; arrives
【单选题】
) 17.There is ________ 800-metre-long road behind ________ hospital．
A. an; an B. an; the C. a; a D. a; the
【单选题】
18. — Did you see a girl in yellow pass by just now?
— No, sir. I ________ a magazine.
A. read B. am reading C. was reading D. would read
【单选题】
19.In fact, my parents are not only kind to me, but also strict ________ me.
A. at B. to C. for D. with
【单选题】
20. The boy_____ a yellow sweater can_____ himself now．
A. wearing; dress B. putting on; wear C. put on; dress D. dressing; wear
【单选题】
21. —Jack, I haven’t seen your brother for a long time．
— He ________Shanghai on business for two months．
A. went to B. has gone to C. has been in D. has been to
【单选题】
22. The meat with eggs tastes ______. Would you like some more?
A. nice B. well C. bad D. wonderfully
【单选题】
23. — Look! The man standing at the gate ______ be our headmaster．
— No, it _______ be him．He is holding a meeting in the office now．
A. must; can’t B. must; mustn’t C. can’t; can’t D. can’t; mustn’t
【单选题】
24. The Japanese government must do everything ________ polluted water from running into rivers, lakes, seas and oceans．
A. keep B. kept C. Keeping D. to keep
【单选题】
25. —Hi, Jack．Did you go to Jim’s birthday party?
—No, I felt so sad．I ．
A. didn’t invite B. am not invited C. wasn’t invited D. hadn’t invited
【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. It’s good for children to ________ on the Internet.
A. give password to others
B. go into a chat room as they’d like to
C. give out a credit card number
D. get useful knowledge and information
【单选题】
( ) 34. The underlined phrase “leak out” in the third paragraph may mean “________.”
A. give away B. give out C. leave out D. put away
【单选题】
( ) 35.If your parents don’t agree, never ________.
A. read anything on the Internet
B. relax in your free time
C. have a face-to face meeting with anyone you met online
D. treat other people as you’d like to be treated
【单选题】
( ) 36. This passage is mainly about “________”.
A. Internet Safety Rules B. Surfing on the Internet
C. Information on the Internet D. How to use Computers
【单选题】
( ) 37. When was canned food invented?
A. In 1870. B. In 1810. C. In 1902. D. In 1926.
