实际应用题中存在着丰富的函数关系．数学考试要注重考查学生分析问题和解决问题能力的呼声与日俱增，近年来实际问题中的函数关系问题成了各地中考的常见题型．解决这类问题的关键就是找出问题中的等量关系，按照列方程的思想方法，列出函数关系式来．下面我们以近年中考题为? Practical applications have a wealth of functional relationships. There is a growing demand for mathematics exams to focus on students’ ability to analyze problems and solve problems. In recent years, the problem of functional relationships in practical problems has become a common type of questions in local exams. The key to solving such problems is to find out the equal relations among the problems and list the functional relations according to the method of thinking of the equations. Below we take the exam questions in recent years as?