二尖瓣区产生器质性收缩期杂音的原因是A．贫血B．二尖瓣关闭不全C．以上均不是D．甲状腺功能亢进E．发热

作者: rantiku 人气: - 评论: 0

问题二尖瓣区产生器质性收缩期杂音的原因是

选项 A．贫血 B．二尖瓣关闭不全 C．以上均不是 D．甲状腺功能亢进 E．发热

答案 B

解析

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