____ is the ability to do the job rather than where you come from or what you are that matters.

A．It

B．That

C．This

D．There

在应急情况下，主机遥控系统可取消的功能是（）。

A.临界转速限制

B.加速速率限制

C.增压空气压力限制

D.转矩限制