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Author:
junfeilx
GeoGebra
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錐體建築師
異分母分數減法
三位數除以一位數（一）
四邉形 (四年級) 教師版
判斷球體
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範例：畫圈圈的筆
xcxzczxczxczxczxczxc
基本檔
GeoGebra研習作品
circular motion
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Correlation
Rectangle
Logarithm
Numbers
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