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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
判斷球體
球體建築師
小数 的副本
兩組對邊相等和有直角的四邊形
兩位數加法
Discover Resources
y=x²+a的圖形
二次曲線-1.圓錐曲線
等腰直角三角形
二年級_柱體的觀察
Copy of 固定周界的長方形的面積變化
Discover Topics
Cuboid
Random Experiments
Similarity Transformation or Similarity
Statistical Characteristics
Parametric Curves