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彩色莫比乌斯环
Author:
孟宝兴
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
算柱 (兩位數)
異分母分數減法
錐體建築師
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Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
正三角形在正方形圓直線上
trigonometry1
漂亮ㄉ東東
探索金字塔高度
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Complex Numbers
Rational Numbers
Boxplot
Numbers
Statistical Characteristics