医源性输尿管损伤，多发生在()
A．输尿管腰段
B．输尿管入盆腔处
C．肾盂输尿管交界处
D．输尿管膀胱壁段
E．输尿管盆腔段
参考答案：E
The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week．
A．luckily
B．immediately
C．hopefully
D．undoubtedly
已知二叉树后序遍历序列是dabec，中序遍历序列是debac，它的前序遍历序列是
A．acbed
B．decab
C．deabc
D．cedba
