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凸透镜成像规律演示（多情境）
Author:
向霖 蔡
GeoGebra
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【案例】2018年全国1卷理科12题
找出對稱軸
【案例】2013年安徽高考15题
兩位數加法
兩組對邊相等的四邊形
Discover Resources
Solving Triangles (SSA case) 解任意三角形(SSA情況)
五下_分數除法( 教師版)
Apollonius Problem 10 CCC wiki step 5
常用等价无穷小示意图
植树问题
Discover Topics
Frequency Distribution
Translation
Means
Secant Line or Secant
Upper and Lower Sum or Riemann Sum