—It's better for you to listen more in your spare time.

—I think your suggestion deserves________.

A．to be considered

B．being considering

C．to consider

D．be considering

不属于活塞式压气机特点的项目是（）。

A.压力范围广

B.适应性能强

C.效率比较高

D.流量稳定无脉动