问题 单项选择题

螺旋模型的开发过程具有周期性重复的螺旋线状,每个开发周期由4个象限组成,分别标志着开发周期的4个阶段。螺旋模型之所以特别适用于庞大、复杂、高风险的系统开发,是因为它强调其中的______阶段。

A.制定计划

B.风险分析

C.实施工程

D.客户评估

答案

参考答案:C

解析:[分析] 螺旋模型是一个演化软件过程模型,将原型实现的迭代特征与线性顺序(瀑布)模型中控制的和系统化的方而结合起来。使软件的增量版本的快速开发成为可能。在螺旋模型中,软件开发是一系列的增量发布。在早期的迭代中,发布的增量可能是一个纸上的模型或原型;在以后的迭代中,被开发系统的更加完善的版本逐步产生。
螺旋模型强调了风险分析,特别适用于庞大而复杂的、高风险的系统。因此选择C。

阅读理解

New York is a very large city with 8 million people. How do so many people move about the city on their way to work and school? So, we should know something about its transportation.

In New York you can travel about the city by subway, bus, taxi and car. The subway runs on the railroad lines under the city. It crosses the city at different points and goes all parts of the city. Traveling by subway is the fastest way to get around the city.

The second way to travel around the city is by public bus. It’s a slower way to travel. This is because the bus moves in road traffic which is often heavy.

You can also travel around the city by taxi. This is the most expensive way, but the taxi will take you to the very place you wish to go to. If traffic is heavy, the taxi will be slow. During the mornings and afternoons, this is the “rush hour”. This is the time when the traffic is very heavy with people going to and from work.

The last way to get around New York is using your own car. However(但是), it’s not easy for you to drive, especially(尤其是)when you are driving in the “rush hour”. If there is an accident(交通事故)on the road, you will have to wait for a long time.

The best time to travel around the city is from 9am to 4 pm. This is the time after the morning “rush hour” and before the evening “rush hour”. Traffic will be less crowded because most people are already at school or at work.

小题1: This passage is mainly(主要)about _____.

A.the weather of New York

B.the transportation of New York

C.the people in New York

D.traffic accidents in New York小题2: The fastest way to travel in New York is by _____.

A.subway

B.taxi

C.bus

D.car小题3:The most expensive way to travel in New York is by _____.

A.subway

B.taxi

C.bus

D.car小题4:If you travel in New York in your own car, which of the following is the best time?

A.From 8am to 10 am

B.From 3am to 10 pm

C.From 3 am to 5 pm

D.From 10 am to 3pm

单项选择题