作为桥涵台背的回填土，宜采用（）且必须严格压实。
A.巨粒土
B.粒粒土
C.细粒土
D.特殊土
参考答案：B
—May I take the magazine out of the reading room?
—No, you can't. You _______ read it here. It's the rule. [ ]
A. must
B. would
C. may
D. might
（）主要用来堵漏舷窗大小的中型破洞。
A．堵漏板
B．堵漏箱
C．堵漏毯
D．堵漏水泥箱
