题型:问答题 简答题 Jack, are you leaving now? It's 7:20.()A.Yes, it‘s still early.B.No, thirty minutes is enoughC.Yes, the bag is not ready.D.No, I‘ll set off in 30 minutes. 查看答案
题型:问答题 简答题 变(配)电所电源无电时,应按以下规定处理:a)电源进线断路器的继电保护装置已动作而未跳闸者,应立即拉开电源进线断路器,检查所内设备,查明故障点,待故障排除后,电源有电时,方可恢复送电或倒()电源供电b)本所无故障者,可倒用备用电源供电,但应先拉开停电线路的进线断路器,而后再合备用电源进线断路器A.正常B.运行C.备用 查看答案