第2题: [单项选择]下列有关心脏电冲动的描述,不正确的是() A. 冲动在窦房结形成后,由结间通道和普通心房肌传递至房室结及左心房 B. 冲动在房室结内传导速度极为缓慢 C. 抵达希氏束后传导更为缓慢 D. 束支与浦肯野纤维的传导速度均极为快速,使全部心肌几乎同时被激动 E. 最后,冲动抵达心外膜,完成一次心动周期 参考答案:D
第32题: [单项选择]What do we learn from the conversation A. John is not sick. B. John is feeling better. C. Jack hasn’’t been sick. D. Jack has not got better. 参考答案:A 答案解析:W: Hi, John. Haven’’t seen you for quite a few days. I heard you’’ve been sick. How are you feeling