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Author:
貓頭鷹
GeoGebra
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盈利與虧蝕
科赫雪花
镂空正方体案例对比
平行線的判定
球体的截面
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兩條數線比較(雙單位)
量角器1
抛物线中与三角形重心有关的轨迹.许兴华数学
正圆台展开图
幾何板
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Algebra
Distributions
Sine
Probability
Hyperbola