The realization of Page Address Translation request appeared in the phenomenon of missing pages, the use of FIFO FIFO, long the most recent use of LRU, the best replacement algorithm OPT.

• 实现请求页式地址转换中出现的缺页现象时，用到的先进先出FIFO、最近最久未使用LRU、最佳OPT置换算法。