问题
单项选择题
心脏瓣膜病主动脉瓣关闭不全的常见病因是（）
A.感染性心内膜炎
B.风湿热
C.先天性畸形
D.主动脉夹层
E.主动脉瓣钙化
答案
参考答案：B
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心脏瓣膜病主动脉瓣关闭不全的常见病因是（）
A.感染性心内膜炎
B.风湿热
C.先天性畸形
D.主动脉夹层
E.主动脉瓣钙化
参考答案：B
| 补全对话。 | |
B: Yes. It's about my sister, Melisa. She went to school this morning, and she hasn't arrived yet. and it's eleven o'clock and…… A: Just a moment, Miss……? B: Miss Green, 36 Nanjing Road. A: How old is Melisa? B: 1_______ A: And what does she look like? B: 2_______ A: And what's she wearing? B: 3_______ A: We'll try our best to find her. We'll telephone you at soon as possible. B: 4_______ A: 5_______ |