单项选择题
A.压型钢板楼板按设计图示尺寸以铺挂面积计算
B.压型钢板楼板扣除柱、垛所占面积
C.压型钢板墙板按设计图示尺寸以铺设水平投影面积计算
D.压型钢板墙板的包角、包边、窗台泛水不另加面积
单项选择题 A．Because of the bad weather.B．Because of his young age.C．Because he lost his way while crossing the ocean.D．Because he had no partner to help him.
单项选择题 房屋楼梯的楼梯段的踏步步数一般为（）级。
单项选择题 A．He is down-to-earth.B．He is aggressive and optimistic.C．He is discouraged by his failure.D．He is confident about achieving a real first.