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1977北京文8
Author:
常振虎
GeoGebra
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異分母分數減法
兩位數除以一位數（一）
球体的体积推导（优化版）
球體建築師
柱體建築師
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模擬「分頁」效果
阿基米德的異想世界
Tool4P
最短路径
西瓦定理
Discover Topics
Sphere
Isosceles Triangles
Statistical Characteristics
Perimeter
Step Functions