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GeoGebra
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常见几个曲面
Author:
敏敏
GeoGebra
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異分母分數減法
四邊形的特性
GeoGebra笔记功能体验课件
判斷球體
兩位數除以一位數（二）
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南瓜趣臉
test1
...
y=x sin(1/x) 的圖形
三角形全等的直观图(可重合).许兴华数学
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Combinatorics
Addition
Conditional Probability
Geometric Mean
Coordinates