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凸透镜成像
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软 微
GeoGebra
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三位數除以一位數（二）
GeoGebra笔记功能体验课件
画直线等分三角形的面积
畫出對稱圖形
拼砌四邊形
Discover Resources
大邊對大角
傅立葉級數 (2)
Is this a prism 2
線性規劃xgeogebra
畢氏定理
Discover Topics
Geometry
Quadrilaterals
Perimeter
Curve Sketching
Sequences and Series