2011年湖南怀化中考数学试题第15小题为:如图1,若在象棋盘上建立直角坐标系,使“帥”位于点(-1,-2),“馬”位于点(2,-2),则“兵”位于点().(A)(-1,1)(B)(-2,-1)(C)(-3,1)(D)(1,-2)其标准答案为(C).图2这一答案显然是按如图2的习惯方式建立直角坐标系,从而得到答案(C)的.质疑我们先来看一看教材上是如何定义“平面直角坐标系”的:“在平面内画两条互相垂直、原点重合 2011 Huaihua Hunan mathematics test questions in the first 15 small title: as shown in Figure 1, if the establishment of Cartesian rectangular Cartesian coordinate system, so that ”handsome“ is located at the point (-1, -2), ”horse“ at the point (A) (-1,1) (B) (-2, -1) (C) (-3,1) (D) (2) 1, -2) The standard answer is (C). Figure 2 This answer is obviously based on the habit of establishing a rectangular coordinate system in Figure 2, which is the answer (C). How to define ”Cartesian “: ”Draw two perpendicular to each other in the plane, the origin coincides