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徐晓雷
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徐晓雷
GeoGebra
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四邊形的特性
算柱 (兩位數)
找出對稱軸
小数 的副本
GeoGebra笔记功能体验课件
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小二、小三_時間（教師版）
荒島尋寶
圓柱切割
圆锥的侧面展开图3D动画的副本
第二次:20190110
Discover Topics
Linear Equations
General Quadrilateral
Derivative
Surface
Quadrilaterals