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ghseh 二次函數的開口方向
Author:
均一
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
畫出對稱圖形
錐體建築師
判斷球體
Discover Resources
畫三角形 題1a
數位學習社
六面長方體
congruent triangle2_provided by Mr Yeung Kar Chun
相反数 探究 （教材第9页）
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Constructions
Triangles
Confidence Interval
Polygons
Differential Calculus