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【单选题】
在一个单CPU的计算机系统中，有两台外部设备R1、R2和三个进程P1、P2、P3。系统采用可剥夺方式优先级的进程调度方案，且所有进程可以并行使用I/O设备，三个进程的优先级、使用设备的先后顺序和占用设备时间如表5-4所示。 假设操作系统的开销忽略不计，三个进程从投入运行到全部完成，CPU的利用率约为(4)%；R2的利用率约为(5)%(设备的利用率指该设备的使用时间与进程组全部完成所占用时间的比率)。A.
60
B.
67
C.
78
D.
90
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举一反三
【单选题】She has been _________ to another department.
A.
transmitted
B.
transformed
C.
translated
D.
transferred
【单选题】She has been another department.
A.
transported to
B.
ransported by
C.
transferred to
D.
transferred by
【简答题】She is a beautiful red-haired girl. She has been shopping with her Mom in Wal-Mart. It was 1 outside. We all stood there under the 2 , just outside the door. Her voice was so sweet that it 3 the dull ...
【简答题】无论是相依信息论还是一般信息论,讨论的都是客观问题,广义信息论研究包括所有与信息相关的领域,也涉及 因素。
【单选题】She has been another department.
A.
transported to
B.
transported by
C.
transferred to
D.
transferred by
【单选题】She has been ______ another department.
A.
transferred in
B.
transferred with
C.
transferred to
D.
transferred by
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