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将军饮马 主从联动
Author:
兰鑫
GeoGebra
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百分數及其應用
正方形雪花图案
龙形曲线-分形龙
平行線的判定
盈利與虧蝕
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IMO2014C
音調與空氣柱
Reflectional symmetry of Triangular prism
圆锥曲线统一定义单晨
正餘弦函數的疊合
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Congruence
Trapezoid
Ellipse
Sequences and Series
Perimeter