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angles sum on a striaght line
Author:
LAM YU SANG
GeoGebra
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【案例】2018年全国1卷理科12题
画直线等分三角形的面积
找出對稱軸
第八周作业
異分母分數減法
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切線斜率
Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
雙曲線20160521
九點圓
我的第一个绘本
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Definite Integral
Cone
Standard Deviation
Pyramid
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