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Author:
万超杰
GeoGebra
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近似值：有效數字
三位數除以一位數（一）
算柱 (兩位數)
小数 的副本
【案例】2018年全国1卷理科12题
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angles sum of a triangle 2
小棒
包絡線：拋物線
earth
圆柱侧面展开图
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Cone
Cube
Hypothesis Testing
Addition
Quadratic Equations