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GeoGebra
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中华人民共和国国旗
异形操场
斐波那契螺旋弧线（表格法-可动态调节）
盈利與虧蝕
科赫雪花
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車線.ggb
判別式
normal vector
比較小數的大小
尺規作圖
Discover Topics
Hyperbola
Parabola
Line Segment
Calculus
Upper and Lower Sum or Riemann Sum