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1115-2
Author:
chen mingchuan
GeoGebra
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兩位數除以一位數(一)
錐體建築師
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
拼砌四邊形
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平行四邊形
讚2
傅立葉
布丰投针实验
单位圆与正弦函数
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Rectangle
Cosine
Derivative
Mode
Area