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教学素材：椭圆离心率
Author:
清风拂琴，陌上花开
GeoGebra
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龙形曲线-分形龙2
撒针估算面积实验
异形操场
斐波那契螺旋弧线（表格法-可动态调节）
中华人民共和国国旗
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挑战中考压轴题
黎曼和
磁磚著色
试卷讲评
HKCEE 2010 Q15
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Constructions
Trigonometric Functions
Vectors
Quadratic Functions
Reflection