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Author:cherry910502

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兩組對邊相等的四邊形
兩位數加法
兩位數除以一位數（一）
算柱 (兩位數)
拼砌四邊形

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周界2
等角作圖
禪繞畫
正棱台的侧面展开效果
圆锥曲线的生成

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Limits
Subtraction
Linear Equations
Cone
Percentages

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