直视钳穿法输精管结扎术的最大特点A．直接刺穿阴囊皮肤 B．先将_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

直视钳穿法输精管结扎术的最大特点

A．直接刺穿阴囊皮肤

B．先将输精管固定

C．输精管提钩使用方便

D．不缝合皮肤

E．切除部分输精管，断端结扎

答案

参考答案：B

填空题

点P（x，y）在直线x+y-4=0上，则x²+y²的最小值是______．

选择题

By serving others, a person focuses on someone other than himself or herself, _____ can be very eye-opening

and rewarding. [ ]

A. who

B. which

C. what

D. that