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椭圆内反射
Author:
dhc987
GeoGebra
New Resources
兩位數除以一位數（二）
兩位數加法
算柱 (兩位數)
【案例】圆柱体内放置一个大球六个小球
四邊形的特性
Discover Resources
S2,3,5 Statistics
Mars Retrograde
三比值和為一
Clock Simulation
乘法加工
Discover Topics
Calculus
Difference and Slope
Functions
Percentages
Coordinates