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时钟（序列文本）
Author:
迟中金
Topic:
Random Variables
GeoGebra
New Resources
拼砌四邊形
判斷球體
第八周作业
找出對稱軸
柱體建築師
Discover Resources
雙橢
日照图
miao
時鐘
長度和距離(毫米)
Discover Topics
Hypothesis Testing
Circle
Expected Value
Hyperbola
Triangles