A. 窦房结 B. 房室结 C. 房室束 D. 普肯耶氏纤维 E. 房室交界
A. 室间隔 B. 房间隔 C. 右心房前壁 D. 左心房前壁 E. 右心耳
A. 二尖瓣 B. 三尖瓣 C. 腱索 D. 乳头肌 E. 主动脉瓣
A. 房室结 B. 冠状窦 C. 窦房结 D. 房室束 E. Purkinje纤维网
A simple conversation. B. The topic isn't important. C. It doesn’t give many details. D. It is full of many details.