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Author:
LAM YU SANG
GeoGebra
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球體建築師
sanjiaohanshu
GeoGebra笔记功能体验课件
錐體建築師
判斷球體
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单位圆画三角函数图像
蝴蝶定理推廣證明1
因式分解測驗
從長方形的「周界」找回它的「長」和「闊」
达芬奇椭圆仪
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Integral Calculus
Numbers
Rectangle
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