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保持比例
Author:
hjyanghj
Topic:
Geometry
GeoGebra
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拼砌四邊形
第八周作业
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
小数 的副本
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test for fun
Quiz on Interest 利息：測驗
體積
三次函數02
二项式定理
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Secant Line or Secant
Straight Lines
Root
Cube
Translation