相遇问题是指两个运动的物体,同时或不同时从两地相对而行,经过一定的时间相遇,这种行程问题叫做相遇问题.在解决这类问题的时候通常采用下面的步骤:一是找出相遇问题的解题关键,求出两个物体在同一单位时间内共走的路程(即速度和).二是找出相遇问题的关系式.有一点不能忽视:在解题前,一定要渗透理解关键词语的含义,比如“同时”、“相对开出”、“相向而行”、“相背而行”等,只有做到了这些才能轻松的 Encounter problem refers to the two moving objects, at the same time or not at the same time from the two places, after a certain period of time to meet, this trip is called the encounter problem.In the resolution of such problems are usually the following steps: First Find out the key to solving the problem of solving the problem, find out two objects in a common unit of time to go (ie, speed and) .Two is to find the relationship between the problems encountered.One can not be ignored: before the problem, must To penetrate and understand the meaning of the key words, such as “at the same time ”, “relative to open ”, “opposite”, “opposite” and so on, only to do these can easily