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二尖瓣关闭不全的超声诊断要点是()

A、左室变小

B、收缩期显示左室倒流入左房的血流

C、升主动脉狭窄后扩张

D、肺动脉变小

E、二尖瓣口变小

时间：2021-07-17 23:06 关键词：医学影像专升本医学影像诊断学 2020年上学期期末考试练习题

答案解析

B

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