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refraction law
Author:
goldengrape
调整参数： 入射角 n1折射率 n2折射率
GeoGebra
New Resources
球體建築師
GeoGebra笔记功能体验课件
錐體建築師
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
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circuit
橢圓軌跡_過圓內一點與圓內切
ghk106a07 圓半徑與外切、外離關係
圖形遊戲
杨桃李GGB绘本
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Parabola
Statistical Characteristics
Incircle or Inscribed Circle
Special Points
Parallelogram