Most frequently used algorithm for page re_爱下问搜题

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问题单项选择题

Most frequently used algorithm for page replacement is

A． LRU

B． FIFO

C． OPT

D． PPT

答案

参考答案：A

填空题

在利用打点计时器测速度的实验中，下列说法中正确的是______

A．先接通电源，后拉动纸带

B．先拉动纸带，后接通电源

C．电火花计时器使用6V以下的交流电源

D．连续n个计时点间的时间为（n-1）×0.02秒．

选择题

The plane ______ when we got to the airport. [ ]

A. had taken off

B. was taken off

C. will take off

D. is taking off