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教学素材：运动中的圆锥曲线
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
平行線的判定
第八周作业
正方形雪花图案
科赫雪花
龙形曲线-分形龙
Discover Resources
proof SAS
p04 fixed distance from a line
gyzpa 拋物面鏡的反射
单晨答图霸湖北李光荣
梯形
Discover Topics
Rhombus
Fractions
Pyramid
Tangent Function
Translation