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學習活動四平行線法的原理
Author:
CIY
GeoGebra
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兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
【案例】2013年安徽高考15题
異分母分數減法
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Perigal's Dissection
圓與三角形中點的軌跡
量角器3
Question of the shelter
gslsj 三角數列
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Calculus
Similar Triangles
Means
Expected Value
Cosine