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欧拉线与九点圆

Author:吕胜

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異分母分數減法
【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
三位數除以一位數（二）

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FHMS Corr Angles (1 Pair)
角的大小比較
滑桿按鈕輸入框
拋物線4--平行四邊形法
圖三的複本

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Statistics
Mode
Conic Sections
Addition
Function Graph

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