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问题 单项选择题

在我国，市内电缆芯线的扭绞主要采用（）方式。

A.对绞

B.星绞

C.层绞

D.束绞

答案

参考答案：A

改错题
短文改错。
     此题要求改正所给短文中的错误。对标有题号的每一行做出判断：
     如有错误(每行只有一个错误),则按下列情况改正：
     该行多一个词：把多余的词用斜线(＼)划掉,在该行右边横线上写出该词,也用斜线划掉。
     该行缺一个词：在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。
     该行错一个词：在错的词下划一横线,在该行右边横线上写出改正后的词。
     注意：原行没有错的不要改。
It was three o'clock in the morning while suddenly
the phone rang. Mr. Petrie climbed out bed and
replied it."Listen.I'm your next door neighbor. and
your dog is barking such loudly that I can't sleep. If 
you don't do something else about it. I'm going to 
kill that dog!" The next morning in three o'clock,
Mr. Petric went to the telephone and phone his neighbor.
His neighbour dragged him from his bed and
sleepy picked up the phone. "Listen,you," shouted 
Mr. Petrie,"I don't even own dog!"
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单项选择题

船舶搁浅后测主机曲轴臂距差的目的主要是判断（）

A.轴系运转灵活性

B.船体有无变形

C.地脚螺栓松动与否

D.主轴承损坏情况
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