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圆锥曲线的第二定义
Author:
孟宝兴
GeoGebra
New Resources
球体的体积推导(优化版)
錐體建築師
兩位數除以一位數(一)
兩位數除以一位數(二)
球體建築師
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方根化簡
百葉窗2
(3D) Tasks: Pyramid, Paper folding & Solid of revolution[20170615]
ghk106a18 三角形的外心與正方形
我的第一个GGB绘本
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Integral Calculus
Addition
Histogram
Ratios
Matrices