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1977福建卷文5
Author:
常振虎
GeoGebra
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兩位數加法
四邊形的特性
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
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BEES定理2
空間向量座標
平面向量的三點共線定理
翹翹板
等分旋轉
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Exponent
Ratios
Differential Calculus
Hyperbola
General Quadrilateral