问题
单项选择题
女，32岁。诊断为风湿性心瓣膜病、肺部感染。超声心动图显示单纯二尖瓣狭窄，瓣膜无明显增厚，瓣口面积0.6cm2，伴有中度主动脉瓣关闭不全。下列哪项体征可能不出现（）
A.二尖瓣开放拍击音
B.脉压增宽及周围血管征
C.左心室扩大
D.主动脉瓣第二听诊区舒张期叹气样杂音
E.心尖部第一心音亢进
答案
参考答案：B
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女，32岁。诊断为风湿性心瓣膜病、肺部感染。超声心动图显示单纯二尖瓣狭窄，瓣膜无明显增厚，瓣口面积0.6cm2，伴有中度主动脉瓣关闭不全。下列哪项体征可能不出现（）
A.二尖瓣开放拍击音
B.脉压增宽及周围血管征
C.左心室扩大
D.主动脉瓣第二听诊区舒张期叹气样杂音
E.心尖部第一心音亢进
参考答案：B
There is no doubt that the friends can improve our lives, kind of friend someone has. There are some good reasons why real are important. Real fiends can be a source(资源) of _ .When you are in trouble， for example， true friends will hope. Real fiends may help a friend to be as a student president，and the president of a country. Some of us will remember that school，work and life are better and more fun when with fiends. And there are other reasons why real friends are . You can quickly real and good fiends when you are down or when you need their help the most. Why? Because a real fiend will not you when you are down，and will not turn against you in jealousy(妒忌)，for example，when you succeed.
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