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翰林數學_2下_CH3-2_RHS證明
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翰林數學
GeoGebra
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空间中两直线的位置关系
兩位數加法
平行線的斜率
漂亮的摇摆曲线
第八周作业
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四邊形的「等角分點」
P.8.20_1
Mathematics and Optics (and their applications)
分數與小數的副本
钟表制作成功啦
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Addition
Constructions
Prism
Line Segment
Ellipse