漏电保护器的作用之一是:当设备发生漏电时,能在人体触电之后把电源切断
参考答案:错
I'm not a little tired today after giving the room a thorough cleaning and I have never had
______ today. [ ]
A. as tiring a day as
B. as a tiring day
C. tiring as a day as
D. day as a tiring as
在建筑物倒塌事故处置中,对救援人员行动安全的要求是()。
A、不应进入建筑结构已经明显松动的建筑物内部
B、不得登上已受力不均衡的阳台、楼板、屋顶等部位
C、不准冒险进入非稳固支撑的建筑废墟下面
D、冒险进入已经明显松动的建筑物内部实施救人
E、利用大型设施进行施救