已知过两点A(-3,m),B(m,5)的直线与直线3x+y-1=0平行,则m的值是(  )

已知过两点A(-3m),B(m,5)的直线与直线3x+y-1=0平行,则m的值是(  )   

A3            B7           C -7          D-9

答案

C

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