单选题:2~4个月的婴儿见到熟人与陌生人都会微笑,这属于(  )。

题目内容:
2~4个月的婴儿见到熟人与陌生人都会微笑,这属于(  )。 A.有选择的社会性微笑
B.自发性微笑
C.无选择的社会性微笑
D.反射性微笑

参考答案:
答案解析:

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