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诱导公式五（90°+α）
Author:
桃篮翁
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
四邊形的特性
三位數除以一位數（二）
GeoGebra笔记功能体验课件
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Quiz on Translation 平移變換：測驗
畢氏定理
畢氏定理完成20170330final
題 1
宇宙模型
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Secant Line or Secant
Line Segment
Optimization Problems
Terms
Stochastic Process or Random Process