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橢圓的切線作圖
Author:
紀延平
GeoGebra
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【案例】2018年全国1卷理科12题
判斷球體
異分母分數減法
第八周作业
三位數除以一位數（二）
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挑战中考压轴题
二次函數的平移(基本)
線型函數與圖形
Compare areas by cutting shapes Q2
两点电荷连线上电势的分布曲线（2017江苏高考题）
Discover Topics
Poisson Distribution
Addition
Natural Numbers
Differential Calculus
Arithmetic