建筑工程地下室埋置深度为6m,防水混凝土的结构厚度应为()
A. ≥150mm
B. ≥180mm
C.≥200mm
D. ≥250mm
参考答案:D
The hare arrived at the tree exhausted,only ________ that the tortoise had already been there.
A.finding
B.find
C.to find
D.found
客房电梯间到走廊端头客房的距离应控制在()之内。
A、30米
B、40米
C、50米
D、60米