行政单位应当建立健全资产（）等内部管理制度。
A.购置
B.验收
C.保管
D.使用
参考答案：A, B, C, D
Students are always interested in finding out ________ they can go with a new teacher. [ ]
A. how far
B. how soon
C. how often
D. how long
板带钢卷取机的夹送辊采用（）辊型有利于带钢对中。
