左向右分流型先心疾病可有
A．右位心
B．法洛四联症
C．室间隔缺损
D．肺动脉瓣狭窄
E．卵圆孔未闭
参考答案：C
解析：左向右分流型(潜伏青紫型)正常情况下由于体循环压力高于肺循环，故平时血液从左向右分流而不出现青紫。当剧哭、屏气或任何病理情况下致使肺动脉或右心室压力增高并超过左心压力时，则可使血液自右向左分流而出现暂时性青紫，如室间隔缺损、动脉导管未闭和房间隔缺损等。
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| Welcome to Wangfu Street. Wangfu Street is a great place to enjoy 1 . There are 2 shops on it. It is a very 3 street. If you want to 4 , you can go to the bookshops. It is 5 from the big supermarket. There's also a new park 6 the supermarket. It's 7 and quiet. You can 8 your lunch in it. If you want to see 9 , you can go the movie house. It's 10 the supermarket and the park. | |||
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