下列哪项是枕前位胎头进入骨盆入口的衔接径线
A．枕下前囟径
B．双额径
C．双顶径
D．枕额径
E．枕颏径
参考答案：D
Jack ______ a bus to school every morning. [ ]
A. takes
B. brings
C. likes
D. runs
什么叫地层的假整合接触？
