设计一个请求页式存储管理方案，为简单起见。页面淘汰算法采用FIFO页面淘汰算法，并且在淘汰一页时，只将该页在页表中修改状态位。而不再判断它是否被改写过，也不将它写回到辅存。-Design a request page storage management solutions for the sake of simplicity. Page elimination algorithm uses FIFO page elimination algorithm, and in a phase-out, only the page in the page table to modify the status bits. Rather to determine whether it is rewritten, not write it back to the secondary storage.