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黎曼和
Author:
sheri.chen
GeoGebra
New Resources
拼砌四邊形
球体的体积推导（优化版）
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
異分母分數減法
Discover Resources
perimeter
複合圖形
Chords of a Circle
拋物線4--平行四邊形法
一次函数图像的平移
Discover Topics
Rectangle
Continuity
Algebra
Intersection
Conic Sections