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【判断题】
28 判断 (2 分 ) 所谓混合规则,是将状态方程中的常数项项表示为混合物组成和纯物质参数项的函数关系。A.
正确
B.
错误
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【单选题】Why did the man find the job appealing?
A.
He could improve his foreign languages
B.
He could work close to his family.
C.
He could travel overseas frequently.
D.
He could use his previous experiences.
【简答题】选择下列适当词语完成下列句子（每小题1分，共5分） frequently ，schedule ，upset ， trapped ， disaster 小题1:Anne's sister Margot was very __________ when the family had to move. 小题2:Languages ______________ change. 小题3:Now she is...
【简答题】某进程页面访问序列为 2,3,2,2,5,2,4,5,3,2,5,2 且开始执行时内存中没有页面 , 分配给该进程的物理块数是 3 ,采用 LRU 淘汰算法的缺页率是 __________。
【单选题】某进程页面访问序列为4,3,2, 1,4,3,5,4,3,2, 1,5,且开始执行时,内存中没有页面,分配给该进程的物理块数是3,则采用FIFO页面置换算法和LRU页面置换算法时缺页率分别是( )。
A.
83% 和 75%
B.
85% 和 70%
C.
75% 和 83%
D.
84% 和 75%
【简答题】某进程页面访问序列为4,3,2, 1,4,3,5,4,3,2, 1,5,且开始执行时,内存中没有页面,分配给该进程的物理块数是3,则采用FIFO页面置换算法时缺页率为_________,采用LRU页面置换算法时缺页率为_________。
【单选题】Language is the main means of communication between people. But so many different languages have developed that language has often been a barrier rather than an aid to understanding among peoples.
A.
Language is the principle means of communication between people. However, because there are numerous languages, language itself has frequently been a a barrier rather than an aid to understanding among the world population.
B.
People communicate through language. Because there are so many different languages, however, people around the world have a difficult time understanding one anther.
【单选题】某进程页面访问序列为 4 , 3 , 2 , 1 , 4 , 3 , 5 , 4 , 3 , 2 , 1 , 5 ,且开始执行时没有分配页面,若分配给该进程的页框数是 3 ,则采用 FIFO 置换算法和 LRU 置换算法时缺页率分别是
A.
67 ％； 75 ％
B.
75% ； 83 ％
C.
67 ％， 67 ％
D.
75 ％； 75 ％
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【简答题】某进程页面访问序列为 2,3,2,2,5,2,4,5,3,2,5,2 且开始执行时内存中没有页面 , 分配给该进程的物理块数是 3 ,采用 LRU 淘汰算法的缺页率是 __________。
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