在实际生活以及生产实践中经常遇到以排队为背景的问题,这样的模型也经常在各类考试中出现.这里简单地进行分类研究,以供同学们在学习时参考． In the actual life as well as the production practice often encounters the question which takes the queuing as the background, this kind of model also often appears in each kind of examination. Here carries on the categorization research simply, for the classmates when studying the reference.