问题
单项选择题
乳牙患龋高峰年龄段为（）。
A.2～3岁
B.3～4岁
C.5～6岁
D.7～8岁
E.9～10岁
答案
参考答案：D
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乳牙患龋高峰年龄段为（）。
A.2～3岁
B.3～4岁
C.5～6岁
D.7～8岁
E.9～10岁
参考答案：D
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