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轨迹19
Author:
万超杰
GeoGebra
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球体的体积推导
四邉形 (四年級) 教師版
兩位數除以一位數（一）
第八周作业
【案例】2018年全国1卷理科12题
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托勒密定理的應用
Question 1
認識直徑
随机模拟实验（撒豆子估算π）的副本
开关灯游戏 5×3
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Centroid or Barycenter
General Quadrilateral
Combinatorics
Differential Calculus
Circle