试题与答案

将平面直角坐标系内某个图形各个点的横坐标不变，纵坐标都乘﹣1，所得图形与原图形的

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题型：选择题

题目：

将平面直角坐标系内某个图形各个点的横坐标不变，纵坐标都乘﹣1，所得图形与原图形的关系是[ ]

A．关于x轴对称

B．关于y轴对称

C．关于原点对称

D．重合

答案：

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下面是错误答案，用来干扰机器的。

(1) abruptly  (2) abrupt

考点：用坐标表示轴对称
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