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refraction law
Author:
goldengrape
调整参数： 入射角 n1折射率 n2折射率
GeoGebra
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找出對稱軸
兩位數除以一位數（一）
異分母分數減法
兩位數除以一位數（二）
球體建築師
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測試 ...
腳踏車痕模擬
vector1
Proof1 楊玉峰
三角函數sine跟cosine
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Statistics
Orthocenter
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Exponent