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弦的中點軌跡
Author:
李春培
弦的中點軌跡
GeoGebra
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正方形雪花图案
小学资源收集
第三周作业效果演示
龙形曲线-分形龙2
科赫雪花
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happy birthday
Probability(概率)
四角柱體(長方體)的截面
Fractal
中國火柴遊戲一的副本
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Differential Equation
Statistical Characteristics
Conic Sections
Planes
Linear Equations