崩漏的病机是( )
A.肝肾阴虚,虚火上炎 B.脾肾虚弱,运化失司 C.脾胃虚弱,统摄无权 D.冲任不固,不能制约经血 E.以上都不是
参考答案:D
— How soon can you finish this job?
— Two days _____ enough for me to finish the work. I need a week. [ ]
A. isn't
B. aren't
C. is
焊接工件之前为何要清理坡口两侧的铁锈、油污、氧化皮等污垢?