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光折射
Author:
kevin20020905
GeoGebra
New Resources
撒针估算面积实验
中华人民共和国国旗
平行線的判定
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业3
Discover Resources
棋聖加油
test05繪本用
双曲线交抛物线
QQ空间
圓周公式應用題2的副本
Discover Topics
Quadratic Functions
Differential Calculus
Conic Sections
Pythagoras or Pythagorean Theorem
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