在群桩设计中,桩的布置使群桩中心与下列()种荷载组合的重心尽可能重合。
A.作用效应的基本组合
B.长期效应组合
C.长期效应组合且计入地震作用
D.短期效应组合
参考答案:B
-Are you sure you have ______ all the documents in your list?
-Oh, sorry, I forgot to ______ the one you had sent me. [ ]
A. included; contain
B. listed; include
C. listed; be included
D. contained; listed
返流区直径的大小与什么因素有关?