混凝土坝坝底承受的渗透压力大小与()成正比。
A.上游水深
B.下游水深
C.上、下游水头差
D.坝高
参考答案:C
解析:
混凝土坝坝底承受的渗透压力大小与上、下游水头差成正比。
After the car accident, Jack ran to get a doctor, _____, we stayed with the injured and gave them
first aid. [ ]
A. besides
B. consequently
C. meanwhile
D. otherwise
我国已经允许国际开发机构在中国发行人民币债券。( )