相关试题
【判断题】
机车使用串励牵引电机是因为串励电机的特性比较硬，不易空转。
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SS4型电力机车低压试验准备工作之一：将逆变电源选择开关置A或B，并将相应的钮子开关打向工作位，主台显示屏“前节车”、“后节车”、“预备”、“主断”和“零压”灯亮。
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SS4型电力机车低压试验中：闭合主断路器，人为闭合牵引电机过流中间继电器557KA看：主台“主断”灯、“牵引电机”灯仍亮。
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TQG3A型电压传感器利用霍尔效应，采用磁补偿原理，通过霍尔元件实现对直流、交流及脉动电流的电隔离测量，输出信号反比于被测电流。
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CJ8Z-150Z型交流电磁接触器用于交流50 Hz，电压220 V的电路中操纵负载的接通或断开。
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电力机车上使用的牵引电动机有交流和直流之分，而这两种电动机的调速方法是基本相同的。
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道德是用内心信念、传统习惯和社会舆论来维护的，也靠法律条文来维持。
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不同的电路应使用不同电压等级的兆欧表来测量其绝缘电阻。
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熔丝在正常短时过电流情况下，也应熔断。
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SS9型电力机车电流制为三相交流50 Hz。
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SS4型电力机车段修要求：小型交流电动机的容量在10 kW以上的交流电机，运转振动过大时，应对转子进行动平衡试验。
【判断题】
接触器在电力机车上是用来频繁地接通或切断没有负载的主电路。
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电力机车运行方向的控制，采用改变牵引电动机电枢绕组的电流方向实现的。
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真空接触器易出现电弧电流过零前就熄灭，出现截流现象，因而在电感电路中产生过电压。
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SS4型电力机车低压试验中：闭合钥匙开关580QS后，门联锁保护阀287YV吸合，“零”位灯亮。
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触头闭合后，其接触处有一定的互压力，称为触头压力。
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SS4型电力机车段修要求：小型交流电动机的转子转轴配合面光洁，损伤超限或与轴承配合松旷时，不允许采用镀层修复。
【判断题】
模拟信号是指时间上离散、幅值上也离散的信号。
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触头的初压力可以防止触头接触时的碰撞。
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变压器的空载试验是将副边绕组处于短路状态。
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真空断路器具有结构简单、工作可靠、分断容量大、动作速度快、绝缘强度高、整机检修工作量小等诸多优点。
【判断题】
TY型绝缘检测仪两根高压绝缘导线的一端各插至仪器面板上的高压插座内，有红色鳄鱼夹头的一根插入“－”端，有黑色鳄鱼夹头的一根插入“+”端。
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ZD115型牵引电动机采用的是全叠片无机壳。
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善的行为是道德的，恶的行为是不道德的。
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硅整流管的额定电流，指的是它可通过的最大电流。
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稳压二极管是二极管的一种，它在电路中的使用方法和普通二极管一样。
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电力机车进行电阻制动时，牵引电机呈他励励磁方式。
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发热温度极限就是保证电器的机械强度、导电、导磁性以及介质的绝缘性不受危害的极限温度。
【判断题】
TSG3-630/25型受电弓的静态接触压力偏大，导致接触导线和滑板的电磨损增加。
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三相异步电动机运行时，若转差率为零则电磁转矩也为零。
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交—直型电力机车采用交流牵引电动机做牵引动力。
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电器是应电能的运用而产生的，所以电机和一般的负载属于电器的范畴。
【判断题】
调整TSG1-600/25型受电弓的静态接触压力，若弓头在工作高度的下限段不能停留，则调整调整螺栓，改变弧形调整板的倾角。
推荐试题
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
The duties to provide services for children in need are not [ ] to the local social services department
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
We pray that all nations be [ ] and that all people around the world live in peace
【填空题】
controversial，assess， resolve，decrease，alter，abandon，indicate，undermine，compromise， conventional
It was reported the president had [ ]to fight If war was necessary,even if it meant destroying his chances of re-election
【填空题】
controversial，assess， resolve，decrease，alter，abandon，indicate，undermine，compromise， conventional
I had to [ ] one of my email accounts as it was filled with junk mail
【填空题】
controversial，assess， resolve，decrease，alter，abandon，indicate，undermine，compromise， conventional
Darwin's theory of evolution remains[ ] partly because it challenges the religious belief that God created man
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
He suggested a small but [ ] improvement on our former plan; I really appreciate it.
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
She held her hand above her eyes to [ ]them [ ] the sun so that she could see more clearly the man in front of her
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
The boy studied the signs for over an hour,but still could not [ ]them, so he turned to his teacher for help
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
They [ ] the developed countries to commit more money to protecting the environment
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
We will continue to care for those [ ] and work to establish a society that is generous and prosperous
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
Many people [ ]careers and raising kids so that they forget that their marriages also need to be taken good care of
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
My most favorite program is the one that deals with scientific subjects that ordinary people can [ ]
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
Finally, I would like to [ ]by saying that it has been a tremendous pleasure to work with you all
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
He is a person that you always [ ]when you need help.
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
This restaurant is very popular because it has some separate, smaller rooms [ ] families with small children
【填空题】
in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
be/ get caught up in
Betty loves reading.[ ],“Reading is the most wonderful thing in the world.”
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
Every one of you has made a contribution and I [ ] knowledging what each of you has done to make this academic convention such a success.
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in
They all tried to talk [ ], but I couldn't hear anything they said
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
Yellow flowers in the field always [ ] me [ ] my childhood in the countryside
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
We have been practicing for so long and so hard that our team should [ ]winning the game
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
Research on genes will [ ] exciting new medical treatments.,
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
My family [ ] on my father's unemployment benefit after he lost his job
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
Many subway riders read books or listent music in order to [ ] their time on the way to work
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
In order to make sure he would be able to attend the meeting, I called him up two weeks [ ]
【填空题】
open the door to，In advance，all at once，reap the benefits (of)， make the most of，over time， get by， stand a chance (of)，remind of， take pleasure in，
In order to [ ]physical exercise, you have to exercise regularly and for at least half an hour each time
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
Mary was a careful speaker, every word seemed to have been [ ] before it was allowed to escape through her lips
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
He has a special feeling for the brilliant birds, and each spring he eagerly [ ] their return
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
Thanks to the [ ] of air transport,everyone is free to go anywhere at any time
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
John believes that the [ ] of food to the hungry is more helpful than giving money
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
When she heard it was snowing in the city they were going to, she [ ] two more sweaters into her bag.
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
During our stay in Europe we visited many places of [ ] interest, including several castles
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
The wedding ceremony of my sister was a very [ ] experience for our family
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
He was [ ]when he discovered that he didn't have enough money to pay for the red wine he had ordered
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
The local government is pressed to find new places to [ ] dump waste
【填空题】
embarrass，polish， emotional， etticiency，curb ，await， donation ，dump，stuff ，historical
The new system designed to [ ] harmful emissions排放物) from factories will be put into use soon
【填空题】
explore ，transmit， resource， emerge，yield， pose， assume， confidence，inherit， comprehensive
It is so difficult to [ ] the bottom of the ocean because some parts are very deep.
【填空题】
explore ，transmit， resource， emerge，yield， pose， assume， confidence，inherit， comprehensive
It was about 30 seconds before Alex [ ] from the water, we were quite scared
【填空题】
explore ，transmit， resource， emerge，yield， pose， assume， confidence，inherit， comprehensive
We often [ ] that when other people do the same things as we do, they do them,for the same reasons; but this assumption is not always reasonable
【填空题】
explore ，transmit， resource， emerge，yield， pose， assume， confidence，inherit， comprehensive
There is widespread concern that the rising unemployment may [ ] a threat to social stability.
【填空题】
explore ，transmit， resource， emerge，yield， pose， assume， confidence，inherit， comprehensive
After a(n) [ ] physical exam, my doctor said I was in good condition except that my blood pressure was a little high
