By the time I got there, she [ ]
A. left
B. had left
C. leaves
D. has left
答案:B
根据汉语提示,在句中填写适当的短语。
1. We must_____(保护环境)around us in order to make our homeland more beautiful.
2. Everyone of us should devote ourselves to keeping (生态平衡).
3. Let's __ (收拾干净)the broken glass before someone walks on it.
4. It is everyone's duty to save the _ (能源).
5. We often __ (利用)these waste things to make something else.
有一底面宽度为b的钢筋混凝土条形基础,其埋置深度为1.2m,取条形基础长度1m计算,其上部结构传至基础顶面处相应于作用的标准组合为:竖向力Fk,弯矩Mk。已知计算Gk(基础自重和基础上土重)用的加权平均重度γG=20kN/m3,基础及施工地质剖面如图所示。
黏性土层①的天然孔隙比e0=0.84,液性指数IL=0.83,试问,修正后的基底处地基承载力特征值fa(kPa),与下列何项数值最为接近()
提示:假设基础宽度b<3m。
A.172.4
B.169.8
C.168.9
D.158.5