计数器话统的作用主要有（）
A.查错
B.疏忙
C.均衡话务
D.最值查询
参考答案：A, B, C, D
She was told to wear flat shoes ________ her back problem.[ ]
A. on account of
B. regardless of
C. in terms of
D. in case of
一个存贷通账户可以对应（）贷款。
A、仅一笔
B、两笔
C、三笔
D、多笔
