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问题 填空题

机车绝缘介电强度试验的目的是为了检查机车各种电路中电气设备的（）是否良好及在安装时有否损坏。

答案

参考答案：绝缘状态

单项选择题

What happened to the man and the woman
[A] Their English teacher was angry with them.
[B] They didn’t finish their homework.
[C] The man finished his homework, but the woman didn’t.
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单项选择题

某井井深2000m，地层压力25MPA、，则地层压力当量泥浆密度为（）。

A、1.28g/Cm3

B、1.35g/Cm3

C、1.25g/Cm3

D、0.98g/Cm3
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