十万个为什么

各位聪明的神童们,请回答下面的问题,全部答对了有奖(奖品为IPod四个),答错了?拿自己做实验看看。

问题
1. 牙齿断了会不会再长?
2. 指甲断了会不会再长?
3. 为什么小老鼠要经常磨牙?是不是因为小老鼠的牙齿会不停的长?

正确答案
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