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楕圆定义
Author:
WLS
GeoGebra
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盈利與虧蝕
第三周作业效果演示
双心四边形
直線的斜率：水平變化 & 鉛垂變化
第八周作业1
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徐州市初二年级期末试题
多邊形上的自由動點
regular tetrahedron in a cube
放射狀圖形(1)
序列的应用案例--挤油的圆
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Straight Lines
Division
Congruence
Area
Volume