3.
如图,若在象棋棋盘上建立平面直角坐标系,使“帅”位于点(-1,-2),“马”位于点(2,-2),则“兵”位于点( )
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| A. | (-1,1) | B. | (-2,-1) | C. | (-3,1) | D. | (1,-2) |