最近最少使用淘汰算法
参考答案:
比较最近一段时间里对各个页面的访问频率,淘汰访问频率最低的页面。实际上,很多系统都将该算法实现为淘汰“最近一段时间内最久没有访问”
- Do you know where Tom is?
- He_______his cat over there. . [ ]
A. feeds
B. fed
C. is fed
D. is feeding
Microwave communication uses high-frequency (71) waves that travel in straightlines throughthe air. Because the waves cannot (72) with the curvature of the earth, they can be (73) only over short distance. Thus, microwave is a good (74) for sendingdata between buildings ina city or on a large college campus. For longer distances, the wavesmust be relayed by means of"dishes" or (75) . These can be installed on towers, highbuildings, and mountain tops.
A.material
B.equipment
C.medium
D.channel