曳引钢丝绳上漆有明显标志，这是（）标志。
参考答案：平层
Have you got any particular plans for the coming holiday?
Yes._______, I’m going to visit some homes for the old in the city.
A．If ever
B．If busy
C．If anything
D．If possible
7（）。
A.
B.
C.
D.
