一个家庭亲情网中只能有一个家长,一个客户仅限加入()家庭亲情网。
参考答案:一个
接地故障保护的设置应能防止人身间接电击以及电气火灾、线路损坏等事故。在低压配电线路中,漏电保护器作为一项重要的保护设备,应用到线路主保护、分支保护和用户漏电保护中,保护人身和设备的安全。请按照接地故障保护的一般规定,回答问题如下:
防止人身间接电击的保护如采用下列措施()之一的,可不采取规定的接地故障保护。
A.采用双重绝缘或加强绝缘的电气设备(Ⅱ类设备)
B.采取电气隔离措施
C.采用安全超低压
D.将电气设备安装在非导电场所内
The clearinghouse in a futures contract performs all but which of the following roles The clearinghouse :()
A. allows traders to reverse their position without having to contact the other side of the position.
B. guarantees the physical delivery of the underlying asset to the buyer of futures contracts.
C. splits each trade and acts as a buyer to futures sellers and as a seller to futures buyers.