论文部分内容阅读
例1 如图1,若在象棋盘上建立直角坐标系,使“将”位于点(1,-2),“象”位于点(3, -2),则炮位于点( )
Example 1 As shown in Figure 1, if a Cartesian coordinate system is established on a chessboard so that “to” is located at point (1, -2) and “image” is located at point (3, -2), then the cannon is located at point ().