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Author:
周志康
GeoGebra
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三位數除以一位數(一)
判斷球體
球体的体积推导(优化版)
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
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直線方程軌跡
畫三角形 題1a
學生自行製作棒形圖
尺規作圖2
运动的全等三角形.许兴华数学
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Cylinder
Piecewise Functions
Ellipse
Geometry
Surface