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GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
拼砌四邊形
四邉形 (四年級) 教師版
球体的体积推导
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兩數相加
習作A三ch1_11
gjzbh 矩陣與遞迴關係(3階)
乘法的副本
正弦函数图象
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Histogram
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Arithmetic
Orthocenter
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