小额支付系统普通贷记往账业务可进行冲数处理的状态有哪些?()
A、“已复核、已发送”
B、“已复核、已回执”
C、“已复核、回执错”
D、“已录入、未复核”
参考答案:C
What ____________ doing? [ ]
A. are they
B. do they
C. does they
D. they are
机组检修排水和渗漏排水都采用强制排水方式进行排水。