“I’m taking a long vocation. I’m going to the Great Wall.”

“ _______ .When are you leaving？”

A．Don’t wait.

B．That sounds nice.

C．Have a good time in Hong Kong.

D．That’s too bad.

对运行的电气设备安全地进行巡视，改变运行方式、检修试验等，也需利用电气安全工器具来实现。