There is nothing more I can do to try       you to stay,so I wish you good luck. [ ]

A.being persuaded

B.persuading

C.to be persuaded

D.to persuade

影响纸色谱分离的主要因素是（）

A.分离因子

B.比表面积

C.介电常数

D.比旋光度

E.熔距