发电机启动前,对测量主励磁机转子绕组绝缘有何规定?
参考答案:
断开Q4、Q5、Q6,用500V兆欧表测量绝缘电阻(≥1MΩ)。
久服较大剂量后,每易引起水肿的药物是()
A.山药
B.甘草
C.大枣
D.黄精
E.玉竹
We are sorry to inform you that the shipment is not ( ) the standard stipulated in the contract. A. into B. up to C. according to D. instead of