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黃金比例
Author:
葉子鈺
GeoGebra
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兩位數加法
畫出對稱圖形
異分母分數減法
三位數除以一位數(二)
錐體建築師
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关灯游戏
sun1
正弦函数图象的形成
向量求和动画演示
微信公众号“sx880A8”第253期摩纳哥亚国旗(flag of monaco)
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Angles
Plane Figures or Shapes
Division
Indefinite Integral
Differential Calculus