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Author:
yiyi
GeoGebra
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斐波那契螺旋弧线(表格法)
中华人民共和国国旗
异形操场
科赫雪花
小学资源收集
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GGB5_3D:曲線與曲面
球體表面積
正方形推垛
配方法圖解
Sec1302 Example0203
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Sphere
Confidence Interval
Cuboid
Polygons
Quadrilaterals