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符成岗
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符成岗
GeoGebra
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拼砌四邊形
柱體建築師
兩位數加法
三位數除以一位數（二）
判斷球體
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根據百分率找數量（二）: 例4
小數試用
consistent equation 3x3
拋物線有範圍限制的極值
动点最值问题&抛物线模型
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Linear Equations
Cosine
Continuity
Numbers
Trigonometric Functions