题目内容

刀开关的接线要保证断开时,()均不带电,以保证更换熔丝时的安全。

A.静触头
B.外壳
C.保险
D.动触头

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刀开关有（）类型。

A. 胶盖开关
B. 倒顺开关
C. 铁壳开关

刀开关有（）组成。

A. 开关
B. 保险

( )刀开关可以用来发出指令,因此是主令电器。

A. 对
B. 错

LiMing, a Chinese student, just began his study in a university in the United States. In his first week in U.S, he thought everything was new and exciting, and he enjoyed himself a lot. LiMing is in_____ stage of culture shock.

A. honeymoon
B. crisis
C. reintegration
D. gradual adjustment