请求分页存储管理系统，系统的页面置换算法必须包括先进先出页面淘汰算法（FIFO）、最近最少使用LRU页面淘汰算法、最佳淘汰算法。-Storage management request paging system, page replacement algorithm must include the page-out algorithm FIFO (FIFO), least recently used LRU algorithm for page-out, the best-out algorithm.