【判断题】2型动车组采用拉杆式轴箱定位方式,它包括的主要部件有轴箱体、定位节点压盖、轴承单元、轴箱前盖、轴箱后盖、及橡胶盖。
【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...
【判断题】数学模型是指描述系统输入、输出变量以及系统内部各变量之间动态关系的数学表达式。( )
【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( )。
【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.
【判断题】Languages frequently change.
【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
【单选题】按照光驱与计算机主板的连接方式来分,目前台式机最常用的是( )