配电设备列架机面平直,应成一条直线,每米偏差不大于()mm。
A.1
B.2
C.3
D.5
参考答案:C
— Why isn't Cathy here yet?
— She ______ to be picked up at the station.
A.could wait
B.must wait
C.might be waiting
D.can be waiting
110kV(或220kV)馈电线,其电源侧距离保护的振荡闭锁()。