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问题 单项选择题

假设磁头当前位于第105道，正在向磁道序号增加的方向移动。现有一个磁道访问请求序列为35，45，12，68，110，180，170，195，采用SCAN调度（电梯调度）算法得到的磁道访问序列是（）。

A.110，170，180，195，68，45，35，12 

B.110，68，45，35，12，170，180，195 

C.110，170，180，195，12，35，45，68 

D.12，35，45，68，110，170，180，195

答案

参考答案：A

阅读理解

想想如果你遇见下列短文中类似的情况时，你会怎样？

     A mother and her son got into a bus in a small city and sat down. The bus conductor came to them for

their money. The mother said, "I want one ticket to Oxford,"and gave him a shilling (先令, 1先令等于

12便士).

     The conductor looked at the small boy for a few seconds and then said to him, "How old are you, little

friend?"

     The mother began speaking, but the conductor stopped her, and the boy said, "I'm four years old at

home,and two and a half in buses and trains."

     The mother took six pence (便士) out of her bag and gave the money to the conductor.The conductor

gave her one and a half tickets.

1. One day the mother took a bus _____.

A. to a small city  

B. to get some money    

C. with her son    

D. to get a ticket

2. The mother gave the conductor _____ pence in all (总共) that day.

A. 12  

B. 16  

C. 10 

D. 18

3. The mother was _____.

A. not honest (诚实的)    

B. honest    

C. very clever    

D. not clever

4. _____ told him to say, "I'm four years old at home,and two and a half in buses and trains."

A. The conductor    

B. The boy's father    

C. The boy's mother   

D. The driver

5. The boy was really _____ years old.

A. four    

B. two    

C. two and a half    

D. six and a half
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单项选择题

轧机机架抵抗弹性变形的能力称为轧机（）。

A．塑性

B．韧性

C．弹性

D．刚性
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