Tom is so lazy that it is the third time that he _____ late this week.   [ ]

A. is coming      

B. comes          

C. came            

D. has come

胎儿先露部的指示点与母体骨盆的关系称为( )。

A．胎产式
B．胎方位
C．胎先露
D．胎姿势
E．骨盆轴