【单选题】下列有关交换的说法哪个是正确的( )
C.
交换是人们获得自己所需要的某种产品的一种方式
【单选题】(1)引起火灾 (2)报警 (3)违反规章作业 (4)消防队赶到 (5)扑灭大火
【单选题】听力原文: We can agree with primitive man that food is a basic need, but we differ from him in our food wants because of the wide variety of food we have available compared with him we have a wider choice...
A.
Food is no longer a basic need for us. while it was for primitive people.
B.
We eat a wide variety of food.
C.
We no longer eat fruit that primitive people ever ate.
D.
We eat more food than primitive people did.
【简答题】某请求分页式存储管理系统,接收一个共7页的作业。作业运行时的页面走向如下: 1,2,3,4,2,1,5,6,2,1,2,3,7,6,3,2,1,2,3,6 若采用最近最久未用(LRU)页面淘汰算法,作业在得到2块和4块内存空间时,各会产生出多少次缺页中断?如果采用先进先出(FIFO)页面淘汰算法时,结果又如何?
【单选题】Sometimes our opinions differ _______ what we choose to observe and how we deal with what we’ve observed
【单选题】听力原文: We can agree with primitive man that food is a basic need, but we differ from him in our food wants because of the wide variety of food we have available compared with him we have a wider choice...
A.
Food is no longer a basic need for us, while it was for primitive people.
B.
We eat a wide variety of food.
C.
We no longer eat fruit that primitive people ever ate.
D.
We eat more food than primitive people do.
【单选题】下列有关交换的说法哪个是正确的 ?( )
D.
交换是人们获得自己所需要的某种产品的一种方式