非破坏试验
参考答案:
指在较低电压下或用其他不损伤绝缘的办法来测量绝缘的各种特性。进而判断绝缘的缺陷。
There is plenty of rain in the southeast, there is little in the northwest.
A.because
B.therefore
C.while
D.as
“禁止合闸、线路有人工作!”或“禁止合闸、有人工作”标示牌应悬挂在什麽地方?