高速公路收费系统能够完成收费站、路段分中心、省结算中心之间收_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

高速公路收费系统能够完成收费站、路段分中心、省结算中心之间收费业务数据、 ( )、时钟等的通信。

A．紧急电话

B．视频会议

C．费率

D．办公信息

答案

参考答案：C

选择题

Although your son made some mistakes, he worked hard at his lessons. You shouldn't be hard ______ him. [ ]

A. in

B. at

C. on

D. for

选择题

I think Tom, as the head of a big department, should either study regularly or______ his job.