建筑抗震设计第二阶段是指()。
A.大震作用下弹塑性变形验算
B.小震弹性作用下承载力计算
C.小震弹性作用下变形验算
D.中震弹塑性作用下承载力计算
参考答案:A
_________ around the Water Cube,we were then taken to see the Bird’s Nest for the 2008 Olympic Games.
A.Having shown
B.To be shown
C.Having been shown
D.To show
何谓肺大泡?