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fchengang动画
Author:
符成岗
GeoGebra
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垂直線的斜率
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
圓周公式的應用
Discover Resources
圓柱體表面面積
外心的找法與特性
Text in Spreedsheet
湯圓rice ball
拋物面的光學性質
Discover Topics
Difference and Slope
Linear Programming or Linear Optimization
Unit Circle
Similarity Transformation or Similarity
Standard Deviation