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根據百分率找數量（二）: 例3的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
畫出對稱圖形
【案例】2018年全国1卷理科12题
異分母分數減法
【案例】2013年安徽高考15题
兩組對邊相等的四邊形
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Cosine
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