After the company reformed its rules and regulations, we find the business is really ________.

A．taking off

B．bringing in

C．knocking off

D．taking up

下列哪一项功能是（）专变采集终端必备的功能。

A.交流模拟量采集

B.功率控制参数设置和查询

C.事件记录

D.中继转发