问题
单项选择题
The second constriction of ureter lies at （）.
A．prostatic portion of urethra
B．membranous part of urethra
C．where it crosses superior aperture of lesser pelvis
D．where it pierces into the unrinary bladder
E．internal urethral orifice
答案
参考答案：C
，基本中性
与下颌
反
和
和
