— I'm very tired these days because of studying for physics.

— Why not           music? It can make you          . [ ]

A. listen to; relaxing

B. to listen to; to relax

C. listening to; relaxed

D. listen to; relax

色谱法按照两相的状态分类，若流动相是液体，固定相是液体，则称之为（）

A.气固吸附色谱法

B.气液分配色谱法

C.液固吸附谱法

D.液液分配色谱法

E.冲洗法