心脏瓣膜病中可出现第二心音逆分裂的是（）
A.肺动脉瓣关闭不全
B.肺动脉瓣狭窄
C.二尖瓣狭窄
D.三尖瓣关闭不全
E.主动脉瓣狭窄
参考答案：E
What the teacher said in class set all the _____ a lot. [ ]
A. present students to think
B. students present thinking
C. present students thinking
D. students present to think
毒物进入体内在肝脏的代谢转化过程有（）
A.氧化
B.还原
C.水解
D.结合
E.分离
