相关试题
【判断题】
当电容器与电网断开后，能够通过放电电阻放电，一般情况下10min后电容器残压可降至75V以下
【判断题】
钢丝绳在绞磨上使用时，磨芯的最小直径不得小于钢丝绳直径的10倍
【判断题】
减极性电流互感器，一次电流由P1进P2出，则二次电流由二次侧S2端接电能表电流线圈“？”或“※”端，S1端接另一端
【判断题】
小容量的电动机一般用熔断器作过载保护装置
【判断题】
私自启用属于私增容量被封存的设备，用户应承担启用容量每千瓦30元的违约使用电费
【判断题】
同一电路中两点的电位分别是V1＝10V、V2＝-5V，则1点对2点的电压是15V
【判断题】
用万用表测交直流2500V高电压时，应将红表笔插入专用的2500V插孔中
【判断题】
绝缘材料又称电介质。它与导电材料相反，在施加直流电压下，除有极微小泄露的电流通过外，实际上不导电
【判断题】
检修卡片应规范填写，应注明危险点分析情况及相对应的控制措施
【判断题】
工作接地是因电气设备正常工作或排除事故的需要而进行的接地
【判断题】
杆上作业时，要准确地上、下抛掷传送工具和物品
【判断题】
安装单相电能表时，电源相线、中性线可以对调接
【判断题】
兆欧表在使用时，只要保证每分钟120r，就能保证测量结果的准确性
【判断题】
变压器室应设置能容纳全部油量的贮油池或排油设施
【判断题】
如果电缆为不可剥离的半导电层，允许在剥除过程中削去部分绝缘
【判断题】
新装的电缆头的电阻与同长度同截面导线的电阻相比，其比值应大于1
【判断题】
客户重要负荷的保安电源必须由供电公司提供，不可由客户自备
【判断题】
RS485通信线缆的架空、直埋走线宜采用截面不大于0.5mm2带铠装、屏蔽、分色双绞多股铜芯线缆
【判断题】
用户计量装置接线错误时，其退补电费时间为：从上次校验或换装投入之日起至接线错误更正之日止的1/2时间计算
【判断题】
接地体是指埋入地下直接与土壤接触有一定流散电阻的金属导体
【判断题】
电磁启动器又称磁力启动器。它由交流接触器和热断电器等组合而成，具有失压和过载保护性能
【判断题】
主令电器是用于接通或开断控制电路，以发出指令或动作程序控制的开关电器
【判断题】
反映动力电源的供给和电动机的安装配置情况的电路图为配电系统图
【判断题】
对配电设备巡视的目的是为了掌握设备的运行情况及周围环境变化，及时发现和消除设备缺陷，预防事故发生，确保设备安全运行
【判断题】
监察性巡视可全线检查，也可对部分线路抽查
【判断题】
跌落式熔断器的遮断容量应大于安装地点的短路容量的上限，并小于其下限
【判断题】
并联电容器接线端子的机械强度比较脆弱，安装时要注意把连接线适当压紧
【判断题】
在电流互感器极性接反测量检查中，对于多功能电子式电能表，由于有有功功率方向指示，所以可判断出电流是否接反
【判断题】
居民用户的电能表既能计量有功电能，又能计量无功电能
【判断题】
对执行分时电价的客户，抄表时只抄总、峰、谷电量，平电量不用关注
【判断题】
吊钩起重机与抓斗起重机和电磁起重机的起升机构、运行机构都不相同
【判断题】
螺线管所建立磁场的方向，可以用右手螺旋定则判定，即用右手握住螺线管，四指表示螺线管中的电流方向，大拇指表示螺线管发生的磁场方向。（）
【判断题】
用电压表测量负载电压时，要求表的内阻远远大于负载电阻
【判断题】
前后熔断器之间的选择性配合，就是在线路上发生故障时，应该是最靠近故障点的熔断器最先熔断，切除故障部分，从而使系统的其他部分保持正常运行
【判断题】
使用冲击电钻要选用符合要求的钻头，其钻头应锋利，冲击时用力一定要猛，不得使冲击电钻超负荷工作
【判断题】
电工刀刀柄是无绝缘保护的，故不能在带电导线或器材上剥削，以免触电
【判断题】
剩余电流中级保护可根据网络分布情况装设在分支配电箱的电源线上
推荐试题
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
They kept on trying their best to develop
their business, but in such [ ]market competition, they had no Idea if success would come along one day
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
As music plays an important role in our life, many music teachers and educators [ ] taking up a musical instrument at a young age
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
This rule should be entirely clear in the minds of everyone and should not be misunderstood under any [ ]
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
My daughter was shy; she was afraid to ask questions,[ ] to questions in class,or talk with other children
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
I got from him only a letter, which was put on my office desk; [ ] to the receipt of this letter I have never heard from him
【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
【填空题】
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
【填空题】
advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
He suggested a small but [ ] improvement on our former plan; I really appreciate it.
【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
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
