The boy often _________basketball after school. But now he _________piano.

A．plays; is playing the

B．play the; plays

C．is playing the; is playing

D．plays the; is playing

不含麻醉药品和精神药品的复方制剂属于（）

A．药品 

B．药品的特殊性 

C．药品标准制定原则 

D．药品质量 

E．药品标准