用兆欧表逐相测量定子绕组与外壳的绝缘电阻,当转动摇柄时,指针指到零,说明绕组()。
A、击穿
B、短路
C、断路
D、接地
参考答案:D
It was ___ he said ___ disappointed me.
A.what; that
B.that; what
C.that; when
D.it; when
哪些情况会造成APU自动关车()?
A、”APU LOW OIL PRESSURE”灯亮
B、”APU OVERSPEED”灯亮
C、”APU FAULT”灯亮
D、上述A、B、C都会