井下检漏保护装置监视电网对地总绝缘的方法为直流辅助电流法。
参考答案：对
—I regret ________ you that your application has not been successful.
—Not successful? I performed pretty well in my interview!
A．informing
B．to inform
C．having informed
D．to have informed
下列不属于APUD系统肿瘤的是（）
A.肾透明细胞癌
B.类癌
C.肺燕麦细胞癌
D.甲状腺滤泡癌
E.胰岛细胞瘤
