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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
找出對稱軸
第八周作业
近似值：有效數字
直角坐標平面上的旋轉變換
兩位數加法
Discover Resources
waaachen
Sectors 扇形
雙搖桿
方塊圖(平均)
反比例函数的图像与性质
Discover Topics
Binomial Distribution
Interest Calculation
Logic
LCM and GCD
Parallelogram