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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
三位數除以一位數（一）
球體建築師
異分母分數減法
Discover Resources
volleyball throughing
圓錐
Sorting Geometric Figures
正方体展开图的副本
公切線的引入
Discover Topics
Solids or 3D Shapes
Incircle or Inscribed Circle
Combinatorics
Random Experiments
Random Variables