寄库现金尾箱必须使用（）封箱。
A.胶带
B.锁具
C.一次性封签
D.绳子
参考答案：B, C
I like both of these two hats. I can't decide which _____. [ ]
A. take
B. to take
C. taking
D. took
后冲洗树脂固砂法
