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沈暐珊橢圓反射

Author:: fu0 fu6

GeoGebra Applet

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Triangle Inequalities
平行六面體
Similar triangles reasons 2
test1
一的正交分解

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分压电路的总电阻的变化情况
圖形的周界
冰淇淋
光的反射
拋物线

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