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抛物线动态（不一样的做法）
Author:
东彪 赵
Topic:
Conic Sections
,
Parabola
GeoGebra
New Resources
算柱 (兩位數)
球體建築師
柱體建築師
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
Discover Resources
三角函數的性質
圓周 (圖形C)
Congruent Triangles Demo
彈幕模擬
半圆面积的微积分动态演示.许兴华数学
Discover Topics
Hypergeometric Distribution
Arithmetic Operations
Upper and Lower Sum or Riemann Sum
Centroid or Barycenter
Cylinder