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根據百分率找數量（一）: 例3的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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四邉形 (四年級) 教師版
算柱 (兩位數)
錐體建築師
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畢氏定理動畫
空間旋轉矩陣
螢橋國中 周孟承
If指令的應用1
周界-平移法(練習三)
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Kite
Square
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