正常运行中,电压互感器二次侧不能()
A、开路
B、短路
C、闭合
D、连接
参考答案:B
— David, keep ______ in mind that you have to be home by 10 o'clock.
— OK, Mom, I will.
A.it
B.me
C.this
D.one
HC3型机动链锯的最大切割直径为()mm。
A.400
B.500
C.600
D.700