下列四种做法中不符合安全用电原则的是 A电冰箱使用三孔插座 b控制电灯的开关接在零线上c�生触电事故时应先切断电源再�人 d Template




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tomski下列四种做法中不符合安全用电原则的是 a电冰箱使用三孔插座 b控制电灯的开关接在零线上c�生触电事故时应先切断电源再�人 coloring