— You shall get an iPad so long as you come first in the speech contest.

— Is that a ________? Don’t let me down, I hope.

A．trick

B．decision

C．promise

D．goal

下列哪一项是典型肝脓肿的CT表现（）

A.中心区为囊性的占位病变

B.病灶周围有水肿

C.中心有分隔

D.增强扫描后壁强化

E.低密度病变区内可见气体密度影