问题 单项选择题

()开发过程模型最不适用于开发初期对软件需求缺乏准确全面认识的情况。

A.瀑布

B.演化

C.螺旋

D.增量

答案

参考答案:A

解析:本题考查软件过程模型的基础知识。瀑布模型将软件生存周期各个活动规定为线性顺序连接的若干阶段的模型,规定了由前至后,相互衔接的固定次序,如同瀑布流水,逐级下落。这种方法是一种理想的现象开发模式,缺乏灵活性,特别是无法解决软件需求不明确或不准确的问题。演化模型从初始的原型逐步演化成最终软件产品,特别适用于对软件需求缺乏准确认识的情况。螺旋将瀑布模型与快速原型模型结合起来,并且加入两种模型均忽略了的风险分析,适用于复杂的大型软件。增量开发是把软件产品作为一系列的增量构件来设计、编码、集成和测试,可以在增量开发过程中逐步理解需求。

阅读理解

Reading Comprehension

  One day a teacher and his student lay down under a big tree near the big grass area. Then the student

suddenly asked the teacher, "Teacher, I wonder how I find my good friend. Can you please help me?"

  Saying nothing for a few seconds, the teacher then answered, "Well, it's a pretty hard and an easy

question."

  "Look that way. There is a lot of grass. Why don't you walk there? Please don't walk backwards,

just walk straight ahead. On your way, try to find a blade (叶片) of beautiful grass and pick it up and then

give it to me, but just one."

  The student said, "Well, OK then…Wait for me…" and walked straight ahead to the grassy field.

  A few minutes later the student came back.

  The teacher asked, "Well, I don't see a beautiful blade of grass in your hand."

  "On my way, I found quite a few beautiful blade of grass, but I thought that I would find a better one,

so I didn't pick it. But I didn't know that I was at the end of the field, and I hadn't picked any because you

told me not to go back, so I didn't go back."

  The teacher said, "That's what will happen in real life. Grass is the people around you, the beautiful

blade of grass is the people that attract you and the grassy field is time. In looking for your soul mate,

please don't always compare and hope that there will be a better one. By doing that, you'll waste your life

time. Please remember 'Time Never Goes Back'."

1. What did the student want to find?

A. A good friend.  

B. Confidence.

C. Skill.

D. Energy.

2. What did the teacher ask him to do?

A. To walk straight ahead.

B. To find more blades of beautiful grass.

C. To find a blade of beautiful grass.

D. To find a beautiful flower.

3. What does the beautiful blade of grass stand for?

A. People.

B. Friendship

C. Time.  

D. Life.

4. What can we learn from the story?

A. We should save our time.

B. We should protect our environment.

C. We can always find many blades of beautiful grass.

D. We shouldn't waste lifetime only in hoping a better thing.

单项选择题