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waaachen

Author:陳兪宏

waaachen

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兩組對邊相等的四邊形
異分母分數減法
四邊形的特性
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形

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Triangle
集合间基本关系(wd)
绕圆旋转004
數值滑桿動畫
勾股定理的直观证明（义务教育数学新课标-例82）

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Polynomial Functions
Hypergeometric Distribution
Random Experiments
Symmetry
Angles

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