施工现场在电气领域里的防护主要是指施工现场外电线路和电气设备_爱下问搜题

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问题单项选择题

施工现场在电气领域里的防护主要是指施工现场外电线路和电气设备对易燃易爆物、腐蚀介质、机械损伤、（）、静电等危险环境因素的防护。

A.防雷装置

B.电磁感应

C.配电线路

答案

参考答案：B

填空题

从方框中选择恰当的短语，用其正确形式填空，完成句子。

turn down be friendly to in fact come from day off

小题1:Koalas are lazy animals and they       Australia.
小题2:Would you mind         the music a little? Mom is sleeping now.
小题3:I like different kinds of meat.     ，I have beef, mutton, chicken and fish every week.
小题4:On our next      , we will volunteer our time to visit the old people' s home.
小题5:Tony       everyone and many people like making friends with him.

单项选择题

若细纱的捻系数为400，细纱线密度为16tex，则细纱的特数制捻度为（）。

A.100

B.80

C.50

D.25