起重机上任何一点到电网中性间接地电阻应大于（）
A.4Ω
B.10Ω
C.2Ω
D.2.8Ω
参考答案：A
-The floor is dirty. Can anyone clean it?
-_________I do it all the time. [ ]
A. Don't mention it.
B. Why you?
C. Not sure.
D. Not me again.
湿邪引起的症状是( )
A．刺痛拒按B．咽干口渴，口鼻干燥C．病位游移，行无定处D．四肢酸懒沉重E．生痰、化热
