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XY12 核電廠影響範圍
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学用数学
GeoGebra
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sanjiaohanshu
近似值：有效數字
拼砌四邊形
【案例】2018年全国1卷理科12题
錐體建築師
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七巧板揖人2
北區模考非選第二題 (2014.03.06)
鸚鵡螺旋線
折纸成抛物线
莱洛三角形的互滚
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Planes
Cuboid
Subtraction
Matrices
Logarithmic Functions