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圓心角
Author:
范欣茹
GeoGebra
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異分母分數減法
球体的体积推导（优化版）
兩位數除以一位數（二）
找出對稱軸
GeoGebra笔记功能体验课件
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色彩視覺藝術
由拉線80235螢橋國中
鉛筆的長度
梯形
乘法加工
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Rectangle
Surface
Optimization Problems
Limits
Matrices