We planned to climb the mountain today, but in such ______ bad weather, it seems out of ______ question.

A．/; the

B．/; /

C．a; a

D．a; the

全现浇钢筋混凝土结构施工中可采用（）振捣设备。

A.内部振捣器

B.外部振捣器

C.表面振捣器

D.振动台