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高尔顿钉板
Author:
john arnold
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
兩位數加法
讀磅
兩位數除以一位數（一）
圓的切線方程
Discover Resources
正立方體與正三角錐
拋物線
二元线性规划的图解法(练习2)
单晨答空间曲面
动圆与两圆外切与内切(2)
Discover Topics
Ellipse
Bar Chart or Bar Graph
Random Experiments
Scalene Triangles
Trigonometry