若点P(x,y)在第一,三象限两坐标的夹角平分线上,则x与y的关系是,A.x=y B.x=-y c.x=|y|D.|x|=y为什么是A?
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![若点P(x,y)在第一,三象限两坐标的夹角平分线上,则x与y的关系是,A.x=y B.x=-y c.x=|y|D.|x|=y为什么是A?](/uploads/image/z/13346011-19-1.jpg?t=%E8%8B%A5%E7%82%B9P%28x%2Cy%29%E5%9C%A8%E7%AC%AC%E4%B8%80%2C%E4%B8%89%E8%B1%A1%E9%99%90%E4%B8%A4%E5%9D%90%E6%A0%87%E7%9A%84%E5%A4%B9%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E4%B8%8A%2C%E5%88%99x%E4%B8%8Ey%E7%9A%84%E5%85%B3%E7%B3%BB%E6%98%AF%2CA.x%3Dy+B.x%3D-y+c.x%3D%7Cy%7CD.%7Cx%7C%3Dy%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AFA%3F)
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