二次函数,是中学数学教学的重点和难点,也是每年中考必考的内容之一。基于此,本刊选了两篇与二次函数相关的文章,以期能对各位教师的中考复习教学有所帮助。 The quadratic function is the key and difficult point in middle school mathematics teaching, and it is also one of the contents of the annual examination. Based on this, this article selected two articles related to the quadratic function in order to be able to help teachers in the examination review teaching.