洋地黄中毒的呕吐机制是（）
A.伴眩晕及眼球震颤
B.吐后即感舒适
C.呕吐物有酸臭味
D.呕吐物呈咖啡色
E.兴奋化学感受器而发生呕吐
参考答案：E
We ______ him for his working hard on English. [ ]
A. got ready
B. praised
C. were angry
D. hated
美容受术者在手术前常常考虑再三，既想通过手术改变容貌，又担心适得其反，实际上是一种什么样的心理冲突（）
A.双趋冲突
B.双避冲突
C.趋避冲突
D.双重趋避冲突
