—Which do you prefer, a CD player or a walkman?

—I don't like _____. I prefer the new kind of MP4. [ ]

A. both

B. none

C. neither

D. either

急性阑尾炎最典型的临床症状是（）

A.胃肠功能紊乱

B.发热

C.转移性右下腹痛

D.右下腹疼痛

E.恶心、呕吐