问题
单项选择题
S2减弱可见于（）
A.高血压
B.肺动脉瓣狭窄
C.动脉粥样硬化
D.房间隔缺损
E.肺源性心脏病
答案
参考答案：B
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S2减弱可见于（）
A.高血压
B.肺动脉瓣狭窄
C.动脉粥样硬化
D.房间隔缺损
E.肺源性心脏病
参考答案：B
| 选择方框中的句子补全对话，其中两项是多余的。 | |
| A: Dad, shall we go to the park tomorrow? B: 1.______ A: But dad, look. at the sky. Things are not good. 2.______ B: Then we have to stay at home. A: 3.______The number is 121. B: OK. Phone: Good morning, everyone ! 4.______ Today Beijing will be sunny. Tomorrow it will be better and the temperature is 23℃ to 28℃. A: Great! We can go to the park tomorrow. B: 5.______ Remember:study comes first. | |
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