受众的选择性机制三要素的关系图中位于最外层的是（）.
A.选择性记忆
B.选择性注意
C.选择性理解
参考答案：B
Tom is very friendly and helpful. He always ________ his teachers and classmates. [ ]
A. gets on to
B. gets along to
C. gets on good with
D. gets along well with
关于胎方位的正确概念是（）
A.胎先露的指示点（如枕骨、骶骨）与母体骨盆前后左右的关系
B.临产时最先进入骨盆的部位
C.胎儿采取的姿势
D.胎体纵轴与母体纵轴的关系
E.以上均是
