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n-m9bch1-1-2a 二次函數及其圖形 01
Author:
均一
GeoGebra
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科氏力 (Coriolis Force)
折扣
双心四边形
撒针估算面积实验
盈利與虧蝕
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Dividing in a Ratio 按比分物
Escher 階梯 (Penrose Stair)
軌跡方程式-重心軌跡
數線_小數的認識
分數化百分數(以方程計算，增潤項目)
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Cosine
Symmetry
Similar Triangles
Area
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