在慢性输尿管阻塞时输尿管表现为（）
A.蠕动增强
B.正常蠕动
C.蠕动减弱
D.肿块形波纹
E.蠕动增强与弛缓交替出现
参考答案：C
If you think such bad behaviour will go , you're asking for trouble. [ ]
A. punishing
B. punished
C. unpunished
D. unpunishing
QRS波群代表
A．心室肌除极过程B．心房肌除极过程C．心室肌复极过程D．心房肌复极过程E．房室交界区的兴奋性
