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直线与平面垂直的折纸实验
Author:
孟宝兴
GeoGebra
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圓的切線方程
圓的基本性質
讀磅
双心四边形
三角函数 的副本
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研習講義
在試算表中使用按鈕、下拉式選單、勾選框
equations of circle 2
創作對稱圖形 LEVEL 4
截平面
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Volume
Root
Straight Lines
Probability
Random Variables