She is the only one of the girls who _______ in the company.

A．is well paid

B．are well paid

C．is paying well

D．are paying well

在脱介筛上加循环水冲洗，使粘附在颗粒表面上的介质脱除，进入筛下的就是（）。

A、浓介质

B、合格介质

C、水

D、稀介质