行员通过（）打印结单。
A.正式登出时系统联动
B.“内部管理—查询—结单”交易
C.待处理任务
D.完成现金、凭证轧账后系统联动
参考答案：A
Never before ______ in greater need of modern public transport than it is today. [ ]
A. has this city been
B. this city has been
C. was this city
D. this city was
依据华电集团《安全生产事故（事件）综合应急预案》，应急响应程序分为哪几个过程？
