176. --- I didn’t know you were good fri

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问题选择题

176. --- I didn’t know you were good friends.

--- You ______. I have known her since she moved here. You were studying aboard then.

A．may have

B．needn’t have

C．wouldn’t have

D．must have

答案

单项选择题案例分析题

患者女性，55岁，曾有风湿关节疼痛病史，近期出现气短、呼吸困难、乏力、心悸等症状，听诊于心尖区可闻及舒张期杂音，X线检查示心影扩大，呈梨形，二维超声心动图检查见二尖瓣前后叶增厚、钙化，交界处有粘连，瓣膜变形，活动受限，瓣口变小。

如果该病进一步发展成为联合瓣膜病，那么可能最先累及的另一个瓣膜是（）。

A.二尖瓣

B.三尖瓣

C.主动脉瓣

D.肺动脉瓣

E.下腔静脉瓣

单项选择题

油包水型乳化剂

A．分层
B．转相
C．酸败
D．絮凝
E．破裂