题目内容：
出现“认生”现象的年龄大致在（ ）。
A．1～3个月 B．3～4个月
C．4～5个月
D．6～12个月
参考答案：
答案解析：
单选题：出现“认生”现象的年龄大致在（ ）。
- 题目分类：职业道德和理论知识
- 题目类型：单选题
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B．3～4个月
C．4～5个月
D．6～12个月
B．3～4个月
C．4～5个月
D．6～12个月
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