【判断题】
如果施工临时电源是低压三相四线供电,可以采用三芯电缆另加一根导线当零线供电
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冬季施工,电缆敷设现场的温度如果低于要求要采取加热电缆的措施,否则不能敷设
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电缆穿管敷设时,一根电缆管只允许穿一根电力电缆
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倒闸操作应根据值班调控人员或运维人员的指令,受令人复诵无误后执行。发布指令应准确、清晰,使用规范的调度术语和线路名称、设备双重名称
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失压脱扣器是一种在无电后使断路器跳闸的电气装置
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三相电容器只要其额定电压不低于电网的额定电压即可直接接入使用
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电容器组可进行连续无间隔频繁停、送电操作
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《农村低压电网剩余电流动作保护器配置导则》规定:用于保护单台电器设备(工器具)或局部共用供电插座回路的剩余电流动作保护器称家保
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在测量电气设备绝缘电阻时,应采用电场屏蔽、连接表的屏蔽极等措施,克服感应电压的影响
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故障巡视应始终认为线路带电,即使明知线路已停电,也应认为线路随时有恢复送电的可能
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双尾式熔断器较纽扣式熔断器有更好的开断能力
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分支线路安装跌落式熔断器,熔丝元件一般不应小于所带负荷电流的1.2倍
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断路器的额定工作电压大于或等于线路额定电压
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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
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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
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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
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小容量的电动机一般用熔断器作过载保护装置
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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
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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
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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
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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
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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
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杆上作业时,要准确地上、下抛掷传送工具和物品
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安装单相电能表时,电源相线、中性线可以对调接
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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
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变压器室应设置能容纳全部油量的贮油池或排油设施
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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
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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
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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
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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
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【单选题】
The underlined word "accentuate" (Para. 3) most probably means "________".___
A. worsen
B. accelerate
C. relieve
D. improve
【单选题】
Why were cracks in old houses not a big concern?___
A. Because environmental protection was given top priority.
B. Because indoor cleanness was not emphasized.
C. Because they were technically unavoidable.
D. Because energy used to be inexpensive.
【单选题】
This passage is most probably taken from an article entitled "_________".___
A. Energy Conservation
B. Air Pollution Indoors
C. House Building Crisis
D. Traps in Building Construction
【单选题】
We need to plan ahead in order to ___________.___
A. keep a record of all the events
B. better organize our activities
C. store everything in our head
D. pile up little tasks neatly
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Strategic times are best for us to ___________.___
A. save energy
B. check e-mails
C. study efficiently
D. organize activities
【单选题】
Which of the following could be used as a motivation to do our assignments?___
A. Remembering our urgent tasks.
B. Any activities we're eager to do.
C. Taking a break in the afternoon.
D. The promise to study efficiently.
【单选题】
What can help us to keep refreshed throughout the day?___
A. Doing some physical exercise.
B. Taking a short nap in the afternoon.
C. Rushing through some assignments.
D. Playing a game of chess with a friend.
【单选题】
Which of the following could be the best title for this article?___
A. Study Habits and Time Management
B. Business Management and Leadership
C. University Education and Campus Life
D. Life Goals and Academic Development
【单选题】
It is implied in the text that it is hard to ________.___
A. carry life learning though
B. tell the nature of life learning
C. learn without going to school
D. find a specially trained teacher
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According to the author, the schooling framework often ________.___
A. produces slow students with poor memories
B. ignores some parts of the official curriculum
C. fails to provide enough knowledge about life
D. gives little care to the quality of teaching materials
【单选题】
Life learners recognize that learning will not be difficult if they are _________.___
A. clear about why to learn
B. careful to make a time table
C. able to respect other people
D. cautious about any mistakes
【单选题】
According to the author, life learning ________.___
A. could prevent one from running risks
B. could be a road full of trials and errors
C. makes a kid independent of his parents
D. teaches a kid how to avoid being scorned
【单选题】
Through life learning, children ________.___
A. will grow without the assistance from parents
B. will learn to communicate with the real world
C. will be driven to learn necessary life knowledge
D. will be isolated from the negative side of society
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A good title for this passage is __________.___
A. Sleep
B. Good Health
C. Dreams
D. Work and Rest
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The word drowsy in the last paragraph means __________.___
A. sick
B. stand up
C. asleep
D. a little sleepy
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This passage suggests that not getting enough sleep might make you ___________.___
A. dream more often
B. have poor health
C. nervous
D. breathe quickly
【单选题】
During REM, ___________ .___
A. your eyes move quickly
B. you dream
C. you are restless
D. both A and B
【单选题】
The average number of hours of sleep that an adult needs is __________.___
A. approximately six hours
B. around ten hours
C. about eight hours
D. not stated here
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4、Sjogren syndrome___
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2、唇腭裂治疗的新概念是___,即___。常包括以下医师:___及___、___、___。
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3、颌面部外伤后易出现两类窒息:阻塞性窒息和___、阻塞性窒息常见于三种情况:___、___、___。