问题 单项选择题

下面是关于Pentium微处理器虚拟8086模式的叙述,其中错误的是

A.虚拟8086模式是保护模式下的一种工作方式,在此模式下可以运行原来为8086处理器编写的程序

B.虚拟8086模式下,每一个任务占用1MB内存空间,地址范围固定在00000~ FFFFFH

C.虚拟8086模式下,存储器空间既可以分段也可以分页,从而为虚拟内存和多任务管理提供了方便

D.虚拟8086模式下,程序运行的特权等级为3

答案

参考答案:B

解析: 虚拟8086模式是保护模式下的一种工作方式,但仍然有很多差别,实模式下的IMB存储空间的寻址范围是00000H-FFFFFH,而虚拟8086模式下每个任务都可占用1MB存储空间,并且能在整个4GB内存空间浮动,选项B说法错误,为本题正确答案。

阅读理解

阅读理解。

     An 80-year-old man was sitting on the sofa in his house along with his 45-year-old son. Suddenly a crow

(乌鸦) landed on their window.

     The father asked his son, "What is that?"

     The son replied, "That is a crow."

     After a few minutes, the father asked his son for the second time, "What is this?"

     The son said, "Father, I told you just now. It's a crow."

     After a little while, the father asked his son the same question for the third time, "What is this?"

     This time, the son said to his father in a low and cold tone, "It's a crow, a crow." 

     After a moment, the father yet again asked his son for the fourth time, "What is this?"

     This time his son shouted at his father, "Why do you keep asking me the same question again and again?

I have told you already, 'IT IS A CROW'. Are you not able to understand this?"

     A minute later the father went to his room and came back with a diary, which he had kept since his son

was born. On opening a page, he asked his son to read that page.

     Today my little son aged three was sitting with me on the sofa when a crow suddenly landed on the window

edge. My son asked me 23 times what it was, and I replied him 23 times that it was a crow. I hugged him

lovingly each time he asked me the same question. I didn't at all feel angry, but instead felt affection for my

son.

     If your parents reach old age, do not look at them as a burden, but speak to them gently, and be kind to

them. From today say this aloud, "I want to see my parents happy forever. They have cared for me ever since

I was a little child. They have always showered me with love. I will take care of my old parents in the best

way no matter how they behave."

1. The writer mainly intends to _____. [ ]

A. tell us the function of a diary

B. call on us to love our parents

C. teach us what a crow is

D. introduce a pair of son and father

2. The underlined word "affection" (last but one Para.) probably means _____. [ ]

A. puzzlement

B. hatred (恨)

C. worry

D. love

3. We can infer that the father wrote that piece of diary at the age of _____. [ ]

A. eighty

B. three

C. thirty-eight

D. forty-five

4. The old man brought out the diary, which he had kept since his son was born, because _____. [ ]

A. he forgot what had happened

B. he would like his son to read it

C. it could remind himself of the past

D. he wanted to find what a crow was

判断题