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等高线演示Contour Lines
Author:
WLS
GeoGebra
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第八周作业
科赫雪花
异形操场
盈利與虧蝕
撒针估算面积实验
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優良作品2(孟倫)
正方形轉轉
transformation_translation
正方体展开图
華容道Klotski Puzzle-三橫二豎(考生版)
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Coordinates
Plane Figures or Shapes
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Rectangle