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三角函數的性質
Author:
yuchengda
GeoGebra
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三位數除以一位數（二）
画直线等分三角形的面积
兩位數除以一位數（一）
柱體建築師
【案例】2018年全国1卷理科12题
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Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
動態文字指數函數
test
貝氏曲面
分数应用题——巧分烧饼
Discover Topics
Curve Sketching
Mathematics
Trigonometric Functions
Geometric Transformations
Trigonometry