在人民银行开立准备金账户机构的会计部门必须()与当地人民银行进行核对。
A、每月
B、每二月
C、每季
参考答案:A
I don't know whether you happen ____ that he has been away for two months.[ ]
A. to be heard
B. to be hearing
C. to hear
D. to have heard
简述铆钉松动的特征。