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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
sanjiaohanshu
拼砌四邊形
找出對稱軸
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
Discover Resources
謝爾賓斯三角形
中華民國國旗
三節棍1060317
拋物線2--焦點法
雙曲線的副本
Discover Topics
Geometric Distribution
Constructions
Upper and Lower Sum or Riemann Sum
Angles
Diagrams