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李洲意
Author:
Lee Chew Yee
GeoGebra
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近似值：有效數字
四邊形的特性
判斷球體
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
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龍騰4_1-1習6-1
練習
雙曲線20160521
ghk106a11 三角形面積比
二元线性规划的图解法(练习1)
Discover Topics
Linear Regression
Equilateral Triangles
Tangent Line or Tangent
Linear Programming or Linear Optimization
Cylinder