外用搽剂（如红花油）多选用非极性溶剂，可选用（）。

A.甘油

B.乙醇

C.丙二醇

D.液体石蜡

Recently in China, the brain drain has been ______. That is to say, there has been a _______ of the

process across China.[      ]

A.  refuse.  refusal       

B.  change; change  

C.  arrive; arrival      

D.  reversed; reversal