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椭圆的定义

Author:guomenglin

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算柱 (兩位數)
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
第八周作业
兩組對邊相等的四邊形

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方格紙上畫長方形1
研習講義
door
Rotation
一道三视图的题目（三视图作法参考）

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Translation
Unit Circle
Combinatorics
Ratios
Sequences and Series

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