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重心
Author:
陳怡靜
GeoGebra
New Resources
三位數除以一位數（二）
垂直線的斜率
圓的切線方程
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
Discover Resources
关灯游戏
夜市麻將模擬機
劉徽的「割圓術」
双曲柄结构
伸縮矩陣的副本
Discover Topics
Kite
Fractions
Statistical Characteristics
Vectors 2D (Two-Dimensional)
Stochastic Process or Random Process