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椭圆内切圆链
Author:
孟宝兴
GeoGebra
New Resources
平行線的斜率
斜率的值
盈利與虧蝕
撒针估算面积实验
折扣
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優良作品1(沛綺)
probwei1
第一个学习创建
平面截圆锥
我的第一个GGB绘本
Discover Topics
Geometry
Planes
Translation
Rotation
Differential Equation