当电力系统实际电压比设备额定电压低很多时，用户设备的功率会降低，但危害不大。
参考答案：错
The manager requested that no one________of his decision until the next meeting.[ ]
A．would tell
B．told
C．be told
D．would be told
检修或施工前应做哪些管理准备工作？
