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七年级数学平行线间的橡皮筋问题

Author:陈小南

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畫出對稱圖形
國旗 (作圖步驟直接餵給 Claude)
中華民國國旗 (Codex╱2026.10.06)
近似值：有效數字
四邊形的特性

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四心的變化
二元一次不等式-約東條件下的極大值極小值
先估算，後看解釋
縫衣針
特殊四边形的转换

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Differential Equation
Cuboid
Continuity
Bar Chart or Bar Graph
Vectors 2D (Two-Dimensional)

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