题目内容

在某单CPU的计算机系统中，采用可抢占优先级的任务调度方案，且所有任务可以并行使用I/O通道。内存中有A1、A2两个任务，按照A1、A2的次序运行，其内部计算和I/O操作时间见表1-1。表1-1 可抢占优先级的任务调度表任务优先级每个任务独立运行时所需的时间及过程 A1 高计算30ms→I/O 40ms→计算20ms A2 低计算60ms→I/O 40ms→计算30ms 若调度程序的执行时间忽略不计，按多道程序运行方式完成这两个任务比按单道运行方式节省的时间是 (54) 。

A. 40ms
B. 60ms
C. 100ms
D. 200ms

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Questions 24 to 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news What was Israeli diplomat, Josef Hassine charged with

A. Forcing the government to follow anti-Israeli policies.
B. Attacking Indian government’s order.
C. Interfering in Indian affairs.
D. Making ill comments about Indian External Affairs Ministry.

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急性胰腺炎的临床表现错误的是

A. 腹痛可以向腰背部放射
B. 可有上腹部肿块
C. 腹部体征与腹痛程度相一致
D. 有中度以上的发热
E. 可有低血压或休克

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Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What is the main topic of this passage

A. Sir William Johnson’s role in colonial America.
B. The trade patterns of the Iroquois nation.
C. Sir William Johnson and the American Revolution.
D. The British-French conflicts in the 1700’s.

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系统分析也可称为功能分析或______分析。

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A. 40ms B. 60ms C. 100ms D. 200ms

Questions 24 to 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news What was Israeli diplomat, Josef Hassine charged with

急性胰腺炎的临床表现错误的是

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What is the main topic of this passage

系统分析也可称为功能分析或______分析。

A. 40ms
B. 60ms
C. 100ms
D. 200ms