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• file:03判定定理SAS.mp4
• file:00全等三角形的引入.mp4
• file:07角平分线的性质与判定.mp4
• file:05加减消元法.mp4
• file:08解三元一次方程组.mp4
• file:06方程组的解的情况.mp4
• file:07含参问题解题思路.mp4
• file:02二次函数图象.mp4
• file:10交点式.mp4
• file:04证明点在垂直平分线上.mp4
• file:01轴对称与轴对称图形.mp4
• file:12将军饮马问题.mp4
• file:11多边形外角和.mp4
• file:06二次根式的加减 .mp4
• file:01what is 二次根式.mp4