相关试题
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当UPS电源故障时，可以将UPS甩掉，直接由直供输出向设备供电。
【判断题】
车站子系统发送的信息经TDCS通信通道由前置机收集打包后通过调度所局域网送到通信服务器。
【判断题】
TDCS机柜使用的A机和B机采样板型号是一样的。
【判断题】
TDCS设备要求提供独立的单向交流电。
【判断题】
调车信号机不良，影响调车作业，属于信号障碍。
【判断题】
信号设备备用器材的储备量，可以超过年轮修器材总数的50%。
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更换钢轨绝缘夹板，由电务方面负责要点，工务人员配合。
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接到故障通知后，信号维护人员赶赴现场时若当时故障已恢复，则可以直接交付车站正常使用。
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工务要求信号工区配合的项目主要是道岔区作业、更换线路及道岔。
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为了保证不间断供电，对一级负荷应有两路独立电源作为主电源和副电源。
【判断题】
在轨缝处安装的钢轨绝缘与钢轨类型无关。
【判断题】
380V及其以下低压电力线路与铁路交叉或平行时，电杆外缘至线路中心的水平距离不少于2150mm。
【判断题】
电气化铁道由电力机车和牵引供电系统两大部分组成。
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测量导线或对地绝缘电阻时，如果接有防雷元件应当取下来。
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带电的设备不能直接接地，只能通过适当的防雷元件接地。
【判断题】
移位接触器是检查挤切销是否折断移位的装置。
【判断题】
为了防止电动机损坏，所以电动转辙机只能做负载试验，而不能做空载试验。
【判断题】
现场维修人员是可以随意调整S700K电动转辙机摩擦力的。
【判断题】
CTC系统所需现场信号、联锁、闭塞设备信息均应从车站联锁设备以及TDCS系统获得。
【判断题】
按道岔的结构不同可分为普通单开道岔、对开道岔、单式交分和复示交分道岔四种。
【判断题】
道岔尖轨卡物、外界施工妨碍造成信号设备不能正常使用时，应列为非责任障碍。
【判断题】
当道岔一经启动后应保证能转换到底，因故不能转换到底时，应保证经操纵后能转换到原位。
【判断题】
ZD(J)9系列电动转辙机交流系列采用三相380V交流电动机，故障少，电缆单芯控制距离长。
【判断题】
断开遮断开关时，摇把能顺利插入摇把齿轮或用钥匙打开电动转辙机机盖，此时电动机的动作电源将被可靠地切断，不经人工操纵和确认，不能恢复接通。
【判断题】
在三线制道岔控制电路中，由于1DQJ不缓放，道岔能转换到底。
【判断题】
S700K型电动转辙机的机身是通用的，经配件组装，可组成不同种类。
【判断题】
S700K型电动转辙机根据安装方式不同，每一种类分为左开、右开两种。
【判断题】
S700K型电动转辙机开关锁是操纵遮断开关闭合和断开的机构。
【判断题】
S700K型电动转辙机当钥匙立着插入并顺时针转动90°时，遮断开关被可靠断开。
【判断题】
在处理信号故障时，为判断继电器好坏也不允许临时借用电源动作继电器。
【判断题】
无极继电器的正向工作值小于反向工作值。
【判断题】
轨道电路送电端可调电阻的作用是调整轨面电压。
【判断题】
JZXC-480型轨道电路送、受电端轨面电压及限流器电压降测试周期为每季一次。
【判断题】
97型25Hz相敏轨道电路送电端限流电阻的阻值与JZXC-480型交流轨道电路一样可以根据需要调整在不小于2Ω的范围内(对道岔区段)。
【判断题】
交流电力牵引区段室外的信号干线电缆应使用综合护套信号电缆。
【判断题】
电气化区段四信息移频轨道电路的区间轨道区段采用双轨条轨道电路，而站内轨道区段采用单轨条轨道电路。
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She __________ in wearing that old – fashioned hat.___
A. insists
B. persists
C. assists
D. consists
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Some of the meat came from Canada. How about________？___
A. another
B. the other
C. others
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I have brought you ___ flowers for your birthday. ___
A. few
B. a few
C. little
D. a little
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I have also experienced many adventures, but nothing that I have seen ___what you have described. ___
A. compares
B. relates
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That young man has made so much noise that he ___ not have been allowed attend the concert. ___
A. could
B. must
C. would
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“What is Mary doing at home?” “She is playing ____.”___
A. a piano
B. her piano
C. piano
D. the piano
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I’m busy now ,ask him to see me ____ time.___
A. the other
B. some other
C. other
D. another
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The child took a spoonful and tasted it carefully __________ it was hot.___
A. in case
B. provided
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The French pianist who had been praised very highly __________ to be a great disappointment. ___
A. turned off
B. turned up
C. turned out
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“Shall I turn on the television?” – “No, I’d rather not __________ television tonight.”___
A. have watched
B. to watch
C. watch
D. for watching
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They said that they had made up their minds to ____the task in spite of the extremely difficult conditions.___
A. carry on
B. carry off
C. carry away
D. carry forward
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The two girls are getting on very well and share with each other. ___
A. little
B. much
C. some
D. none
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The teacher said that the classroom was empty __________ a few chairs.___
A. but for
B. except for
C. apart from
D. besides
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______you choose， make sure that it is a good one. ___
A. What
B. Wherever
C. Whichever
D. Which
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Vingo was released from prison_____the successful efforts of his friends to prove his innocence. ___
A. according to
B. as a result of
C. for reasons of
D. with the help of
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Entering the room， I found my father __ at the desk and ___ something .___
A. seat... write
B. seated ... wrote
C. seated ... writing
D. seating ... writing
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Cake __________ of flour, sugar, egg and some other ingredients. ___
A. contained
B. consists
C. includes
D. composed
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Mr. Peter wanted Steve to take half the money, but Steve did not __________ it. ___
A. obtain
B. achieve
C. accept
D. receive
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I'd like to take my picture ________stands a high tower. ___
A. where
B. which
C. that
D. there
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__________ the English examination I would have gone to the concert last Saturday. ___
A. But for
B. As for
C. In spite of
D. Because of
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Cars moved very slowly in the 1920s, but they ______move more quickly than in 1910.___
A. were to can
B. did
C. will
D. can
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The little girl needs __________ after her shock. ___
A. being comforted
B. be comforted
C. comforting
D. comforted
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The __________ horse ran away from the fire.___
A. having frightened
B. frightening
C. frightened
D. frighten
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He is __________ of an actor. ___
A. anybody
B. anything
C. somebody
D. something
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You can take ______ seat you like. ___
A. no matter what
B. no matter which
C. what
D. whichever
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He changed his name， _____ that nobody would find out what he had done before. ___
A. having thought
B. to think
C. thinks
D. thinking
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----- _______is your English teacher？ ----- The one in red. ___
A. who
B. which
C. what
D. where
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Can you give me a light for my cigarette? I have ____my matches.___
A. got out of
B. got rid of
C. got away with
D. run out of
【单选题】
Then the speaker __________ the various factors leading to the present economic crisis.___
A. went for
B. went after
C. went into
D. went on
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I know Jonathan quite well and never doubt_____ he can do a good job of it___.
A. whether
B. that
C. when
D. what
【单选题】
I'm afraid it ______ tomorrow, but who knows?___
A. may have rained
B. might rain
C. would rain
D. ought to rain
【单选题】
He has spent ____money on his new house.___
A. a large number of
B. the number of
C. lots of
D. numbers of
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This is the hotel __________ I like to stay.___
A. in which
B. at which
C. to which
D. at that
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Would you mind keeping a（n）__________on the house for us while we are away？___
A. eye
B. /look
C. hand
D. view
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He suggested the sports meet be _______because of the bad weather. ___
A. put away
B. put up
C. put down
D. put off
【单选题】
If the weather is __________ suitable, we will play the football match on Tuesday. ___
A. by means of
B. by any means
C. by no means
D. by all means
【单选题】
_____________is one of the five working languages at U.N. , which _______ are very proud of.___
A. The Chinese, the Chinese
B. Chinese language, Chinese
C. Chinese, the Chinese
D. Chinese language, the Chinese
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The war lasted so long that people were tired of it. Everyday there was large crowds of demonstrators _____against the war.___
A. protecting
B. prescribing
C. protesting
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Tom is so talkative. I’m sure you'll soon get tired ________ him.___
A. of
B. with
C. at
D. on
【单选题】
He ________ driving me home, even though I told him I lived nearby.___
A. insisted on
B. insisted at
C. insisted that
D. insisted in
