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平行四邊形
Author:
李春培
Topic:
Parallelogram
GeoGebra
New Resources
兩位數加法
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
柱體建築師
球體建築師
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學測105-9
Dilate 習作
任意角的三角函数
排水法求物件體積
九九乘法表
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Tree Diagrams
Distributions
Ellipse
Definite Integral
Step Functions