4188| 9
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学龄儿童有必要做窝沟封闭吗? |
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点评
鲁班发明锯子干嘛?座牙的沟壑,本来就是有利于爵烂食物,现在把它填平了,怎么爵烂食物?你看牙齿的“齿”字,不就像把锯子吗?
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点评
这样做的呀---那肯定不能做,得不偿失。
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