输尿管生理性狭窄中最窄的部位是在()
A．肾盂起始部
B．输尿管起始部
C．过髂动脉处
D．跨过骨盆入口处
E．进入膀胱壁处
参考答案：E
--Since you have enough time, why not try going by boat for a change?
---_____________________.
A．Good idea
B．That’s true
C．I suppose so
D．You are too kind
滑车组普通穿法如何走绳？
