曳引机吊装时,起重装置的额定载重量应大于曳引机自重的()倍.
A.0.5
B.1.0
C.1.5
D.2.0
参考答案：C
The house is easily______ from the rest; it has a large blue door.
A．picked up
B．taken up
C．picked out
D．made out
房屋的季节性预防养护的来源是什么？
