为了保护发电机绕组匝间短路，对于绕组双星形引出线的发电机一般_爱下问搜题

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问题填空题

为了保护发电机绕组匝间短路，对于绕组双星形引出线的发电机一般装设（）保护，对于大型发电机组端头采用单星形引出时，则要装设定子（）接地保护。

答案

参考答案：横差；100%

完形填空

A friend of mine met with an accident driving in the darkness. His legs were so hurt that he couldn’t   36 .What was worse was that he found himself unable to ask for help—his mobile phone didn’t 37  . Nothing could be done but 38   in cold wilderness. It was 8 hours later that day broke, and then the   39   of the rescue.
It is almost   40   that he could stand the horror in the darkness for so long. Even more surprising was his 41  , “First of all I checked up on my physical 42  and found myself not in fatal(致命的) danger. Finding no   43   to call for help, I leaned back to try my best to keep the wound from 44  . In this way I fell asleep.
This 45  me of another story: A group of young men   46   to explore a mountain cave and got lost. 47 to find a way out in the dark cave they were 48   and ran anxiously without a sense of   49  . Finally they fell dead in fear and exhaustion. According to the 50    people that found them, the place where they got lost was only about 10 meters away from the   51   of the cave. If they stayed where they got lost and tried to   52  themselves, they would probably   53   a small light glimmering(闪烁) not far away.
We can compare it with our   54   itself. Sometimes when we meet with difficulties in life, we feel lost in the darkness. If it is unclear, you needn’t put up a struggle    55  . Remember: CALM DOWN!

B．unbelievable

C．explanation

D．disappointed

B．immediately

单项选择题

差速器中若盆形齿轮转数为100rpm，右轮转速为80rpm，则左轮转速为（）

A.80rpm

B.100rpm

C.120rpm

D.180rpm