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跑馬燈
Author:
chen mingchuan
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
兩位數加法
Discover Resources
作業 11032
複合圖形表面積(一)
包路線
fraction compare
圆的有关概念
Discover Topics
Linear Programming or Linear Optimization
Area
Multiplication
Median Line
Cosine