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在平面直角坐标系中,点A(-1,2)关于x轴对称的点B的坐标为( ) A.(-1...
在平面直角坐标系中,点A(-1,2)关于x轴对称的点B的坐标为( )
A.(-1,2)
B.(1,2)
C.(1,-2)
D.(-1,-2)
考点分析:
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