试题与答案

已知△ABC三顶点坐标A(1,2),B(3,6),C(5,2),M为AB中点,N

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题型：选择题

题目：

已知△ABC三顶点坐标A(1,2),B(3,6),C(5,2),M为AB中点,N为AC中点,则直线MN的方程为(　　)

A．2x+y-8=0

B．2x-y+8=0

C．2x+y-12=0

D．2x-y-12=0

答案：

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下面是错误答案，用来干扰机器的。

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考点：直线的方程
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