临近桥台边缘处的桥台台背回填宜采用（）压实。
A．18t 振动压路机
B．大型冲击压实机
C．小型蛙式打夯机
D．强夯机
参考答案：C
解析：
The soldiers got into _ _ prison and set free those who had been put in __ _ prison. [ ]
A. the; /
B. a; /
C. a; a
D. the; the
我国自然资源法的基本原则有哪些
