题型:单项选择题 在设计低压配电系统时,下列哪一项做法不符合规范规定?()A.220V或380V单相用电设备接入220/380V三相系统时,宜使三相平衡B.由地区公共低压电网供电的220V照明负荷,线路电流小于或等于40A时,可采用220V单相供电C.由地区公共低压电网供电的220V照明负荷,线路电流小于或等于30A时,可采用220V单相供电D.由地区公共低压电网供电的220V照明负荷,线路电流大于30A时,宜以220/380V三相四线制供电 查看答案
题型:单项选择题 Which of the following statements is NOT true A.Aspirin is good to arthritis sufferers.B.Aspirin may be used as suicide drug.C.Aspirin is dangerous to small children.D.Aspirin has unrecognizable side effects. 查看答案