溃疡性结肠炎（）
A.卵石征
B.苹果核征
C.地图样溃疡
D.跳跃征
E.环堤征
参考答案：C
--- I promise to go shopping with you if you help me with the housework.
--- ____ You are the last person to keep a promise.
A．That’s great!
B．How come?
C．I don’t agree.
D．Come off it!
同化
