第5题: [单项选择]风湿性心脏病二尖瓣狭窄患者经常出现呼吸困难、咳嗽和咯血等症状,随病程延长,上述症状减轻,但出现腹胀、肝大,提示() A. 二尖瓣狭窄程度减轻 B. 发生二尖瓣关闭不全 C. 合并主动脉瓣狭窄 D. 合并主动脉瓣关闭不全 E. 进入右心功能不全期 参考答案:E 答案解析:风湿性心脏病二尖瓣狭窄患者多年后,支气管静脉壁增厚,而且随着病情的进展肺血管阻力增加,出现右心功能不全使以上症状减轻。肝脏大是因右心功能不全引起的肝淤血,腹胀可能是腹腔积液。故选E。其他选项均不能解释
A. That leaders are born not made. B. That leadership could be learned. C. That leadership could be classified into two functions. D. That every effective group needs someone to fill each of the two roles. 参考答案:B