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tan90
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tan90
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
三位數除以一位數(二)
兩組對邊相等的四邊形
画直线等分三角形的面积
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優良作品1
Direct Variation
科學記號
Geogebra 入门
Copy of 畢氏樹
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Hypothesis Testing
Tree Diagrams
Addition
Coordinates
Means