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徐熙伟
GeoGebra
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第八周作业
四邊形的特性
四邉形 (四年級) 教師版
異分母分數減法
找出對稱軸
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鑲嵌圖形-2 ROZE
立體截面
Copy of 固定周界的長方形的面積變化
球體體積圖解
二面角
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Functions
Logarithm
Addition
Ellipse
Rotation