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【单选题】
电工所用的低压验电笔一般适用于多少伏以下的交直流电压?A.
220伏
B.
380伏
C.
500伏
D.
800伏
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举一反三
【单选题】-Why can’t I smoke here? --At no time__________ in the dormitory.
A.
is smoking permitted
B.
smoking is permitted
C.
smoking is allowed
D.
does smoking permit
【判断题】接触器不仅能实现远距离集中控制而且操作频率高、控制容量大,而且具有低电压释放保护、可靠、使用寿命长等优点,所以接触器是控制系统中最重要和最常用的元件之一。
A.
正确
B.
错误
【简答题】She was so ________ in her job that she didn’t hear anybody knocking at the door. A) attracted B) absorbed C) drawn D) concentrated
【简答题】A．Smoking can lengthen life expectancy. B．Smoking can shorten life expectancy. C．We haven't found out yet. D．There is no connection between smoking and life expectancy.
【简答题】西芹又称____等,是芹菜的一个变种,是欧美各国主要蔬菜之一。
【单选题】Smoking isn't a habit with me; it's a () like perfume.
A.
vengeance
B.
endowment
C.
luxury
D.
recollection
【简答题】A．He's surprised she chose that agency. B．He wonders why she's kept her job. C．He doesn't know when her classes started. D．He doubts she makes much money now.
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