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直角坐標平面上的旋轉變換
【案例】2013年安徽高考15题
找出對稱軸
四邊形的特性
sanjiaohanshu
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分數除法5: x ÷ a/b (包含)
代數運算
四邊形的特性
中國傳統剪紙_團花
等腰三角形