施工现场厕所宜设置门和隔板，高度不应小于（）。
A.0.8m
B.0.9m
C.1.0m
D.1.2m
参考答案：B
钢是一种以（）为基体的合金。
He is always working______he can.
A．as hardly as B．as hard as C．so hardly as D．so hard as
