单向板的受力特点？
参考答案：
受力沿长边方向传递到支撑构件。
The boy is very lazy. Before the exams he would rather watch TV than____for his tests.[ ]
A. revise
B. to revise
C. revising
D. to revising
中低压煤气调压站与其他一般民用建筑之间的间距不应小于( )。
A．50m
B．25m
C．15m
D．6m
