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Author:
chen mingchuan
GeoGebra
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第八周作业
拼砌四邊形
畫出對稱圖形
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
Discover Resources
乘法公式1
九點圓
中垂線
題二
我的第一个绘本
Discover Topics
Definite Integral
Confidence Interval
Algebra
Dilation
Percentages