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小狗在两人之间往返跑
Author:
王巍
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
兩位數除以一位數（二）
算柱 (兩位數)
兩組對邊相等的四邊形
Discover Resources
行星運動
Comparing_fraction
tetrahedron_rotation
同心圓
凸透镜成像
Discover Topics
Pyramid
Similar Triangles
Scatter Plot
Sequences and Series
Multiplication