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军云
GeoGebra
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畫出對稱圖形
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
三位數除以一位數（一）
兩位數除以一位數（二）
Discover Resources
旋轉一物件02
外積分配律
函數圖像變換
仰角和俯角
球體建築師
Discover Topics
Algebra
General Quadrilateral
Parametric Curves
Statistical Characteristics
Perimeter