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举一反三
【单选题】Ladies and gentlemen, welcome to Dalian, a famous summer resort ( 避暑胜地 ) and one of the best tourist cities in China. With clear sky, green mountains, blue seas, fine beaches, clean streets and lovely...
A.
comes in the best season.
B.
is here to join more tourists
C.
may not stand the heat here.
D.
is traveling back home.
【单选题】某框架结构柱基础，由上部结构传至该柱基的荷载标准值为Fk=6600kN，Mxk=Myk=900kN·m，柱基础独立承台下采用400mm×400mm钢筋混凝土预制桩，桩的平面布置及承台尺寸如图所示：承台底面埋深3.0m，柱截面尺寸700mm×700mm,居承台中心位置。承台用C40混凝土。混凝土保护层厚度50mm，承台及承台以上土的加权平均重度取20kN/m3。 柱对承台的冲切力设计值 假定相应于...
A.
5870
B.
7920
C.
6720
D.
9070