在近几年中考试卷中,有一类问题出现的频率比较高,这类问题常常以一个几何图形的形象出现,常常表现为动点、动线或者图形运动的问题,解决这类问题仅仅应用几何知识却不够,需要借用代数手段来解决,如列方程、借用函数思想.这类问题出现的位置也比较显眼,它常常出现在试卷的倒数第二,甚至最后一题的位置,因此了解这种题型,并掌握这种题型的解法显得特别重要. In recent years in the examination paper, there is a frequency of occurrence of a relatively high frequency of such problems often appear as a geometric image, often expressed as moving point, moving line or graphic motion problems, to solve such problems only the application of geometry Knowledge is not enough, you need to use algebraic means to solve, such as column equations, borrowing the function of thought. Such problems appear more prominent position, it often appears in the papers last second or even the location of the problem, so understand this Questions, and master the solution of this type of question is particularly important.