三年级科学
Presentation
•
Science
•
3rd Grade
•
Hard
expertonlinetuition 2
FREE Resource
5 Slides • 0 Questions
1
三年级科学
人类
2
人类会呼吸、成长、繁殖、移动
除了身高以外，我们有些身体的器官也会随着成长和改变，例如
3
首先，我们来认识认识牙齿。
从宝宝到小孩一共会长出20颗乳牙。
成人就会换出32颗恒牙。
我们一生有多少颗牙齿呢？
4
犬齿
尖牙
我们的牙齿也有名字
大臼齿
门齿
切牙
小臼齿
磨牙
5
三年级科学
人类
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