会引起分配系数改变的参数改变是 ()

A.柱长缩短

B.固定相改变

C.流动相流速增加

D.相比减少

E.柱温改变

—Don't you usually go to work by bus?

— ___________.  But sometimes l walk.  [ ]

A.  Yes, I do    

B.  No, I don't

C.  I take a bus    

D.  I take the subway