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Author:
万超杰
GeoGebra
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拼砌四邊形
兩位數加法
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
錐體建築師
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ABC 1
三宅一生132 5
碎形
凸透镜成像
基本不等式
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Planes
Division
Statistics
Definite Integral
Mathematics