问题 单项选择题

现在程序设计中使用多道程序设计的目的是 ______。

A.增强系统的用户友好性

B.提高系统实时性

C.充分利用处理器资源

D.扩充内存容量

答案

参考答案:C

解析:[评析] 处理机是计算机中最重要的资源。在现代计算机系统中,为了提高系统的资源利用率,CPU将不为某一程序独占。通过采用多道程序设计技术,即允许多个程序同时进入计算机系统的内存并运行。多道程序设计是操作系统所采用的最基本、最重要的技术。

阅读理解

Some years ago on a hot summer day in south Florida a little boy decided to go for a swim in the old swimming lake behind his house.

In a hurry to dive into the cool water, he ran out the back door, leaving behind his shoes, socks, and shirt as he went. He flew into the water, not realizing that as he swan toward the middle of the lake, an alligator(鳄鱼) was swimming toward the shore.

His mother in the house was looking out the window and saw the two as they got closer and closer. In extreme fear, she ran toward the water, yelling(大叫) to her son as loudly as she could. Hearing her voice, the little boy became alarmed and made a U-turn to swim to his mother. It was too late. Just as he reached her, the alligator reached him.

From the dock(码头),the mother grabbed her little boy by the arms just as the alligator snatched(夺取) his legs. That began an incredible tug-of-water(拔河). The alligator was much stronger than the mother, but the mother was much too passionate(有感情的). A farmer happened to drive by, took aim and shot the alligator.

After weeks and weeks in the hospital, the little boy survived. The newspaper reporter asked if he would show him his scars(伤疤). The boy lifted his legs, then, with obvious pride, he said to the reporter, “but look at my arms. I have great scars on my arms, too. I have them because my mum wouldn’t let go. ”

Some scars have caused us deep regret, but some scars are because of love.

小题1:From the second paragraph we can infer that_____.

A.A child shouldn’t swim in the water by himself.

B.We’d better grasp some skills to protect ourselves

C.We should make enough preparations before swimming

D.We are enjoying ourselves but don’t know the enemy is coming.小题2:The incredible tug-of-water is between _______.

A.The boy and the alligator

B.the boy and the mother

C.The alligator and the mother

D.the alligator and the farmer.小题3:Which of the following statements is true?

A.The alligator was killed by a hunter.

B.There’re scars both on the boy’s arms and legs.

C.The mother was calm when seeing the alligator.

D.The mother won the “match” because of her strength.小题4:Why was the boy proud when he showed the scars on his arms?

A.He survived luckily.

B.He was a child of God.

C.He was injured slightly.

D.He was proud of the scars of love.

单项选择题