问题 单项选择题

严格定义的方法假设前提是

A.认为系统的所有需求都能被事先定义

B.认为系统的所有需求都能随时更改

C.认为系统的所有需求都能确定无误的定义

D.以上说法都不正确

答案

参考答案:A

解析: 严格定义的前提有:所有的需求都能预先定义;修改定义不完备的系统代价昂贵且实施困难;项目参加者之间能够进行准确的通信;静态描述或图形模型对应用系统的反映是充分的;严格方法的生命周期的各阶段都是固有正确的。

阅读理解

People who like their traveling have their reasons. They believe that traveling can help them expand their field of view, especially in the geographical and historical sense. They also think that touring will give them more chances to enjoy different kinds of food and experience new things that would never be brought by other activities. But those who dislike traveling also have some reasons.

Traveling, in my opinion, dose more good than harm. Most importantly, it broadened our mind. We can get in touch with other civilization(文明), culture, customs and ideas.

Through history, most people traveled because of necessity —not for pleasure. People traveled just in order to remain alive. They searched for food to eat or places to live in. They sometimes ran away from enemies. This is not to say that no one ever traveled just for the fun of it. In ancient times, for example, rich Romans traveled all the way to Greece to take part in the Olympic Games, and festivals. Of course, some people decided to travel just out of curiosity. They wanted to find out what it looked like beyond the horizon(地平线). Also business travel has been going on for centuries. Traders could not only make money but also learn to speak several languages and be introduced to different cultures.

So, traveling does enrich our mind and draw new ideas to us. There is no doubt that we can get much from it.

小题1:How many reasons for traveling are mentioned in Paragraph 3?

A.Three

B.Four

C.Five

D.Six小题2:In the writer’s opinion, traveling can be _______.

A.expensive

B.funny

C.helpful

D.tiring小题3:What’s the main idea of this passage?

A.Different kinds of traveling.

B.Traveling enriches our mind.

C.Ways to enjoy yourself while traveling.

D.The advantages and disadvantages of traveling.

单项选择题