结构抗震设计原则是小震不坏、()、大震不倒。
参考答案:中震可修
柔性基础是指( )。
A.混凝土基础
B.砖石基础
C.砌体基础
D.钢筋混凝土基础
You must be _______when you ______he the road.[ ]
A.careful;cross
B.carefully;cross
C.careful;across
D.carefully;across