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dhc987
GeoGebra
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四邉形 (四年級) 教師版
拼砌四邊形
錐體建築師
第八周作业
兩位數除以一位數（一）
Discover Resources
圓定理2.1
杯麵
對應高底圖
反射路徑(角落進洞)
统计图表制作
Discover Topics
Vectors 3D (Three-Dimensional)
Arithmetic Operations
Combinatorics
Prism
Scatter Plot