什么是原型法?用原型法开发信息系统有何优缺点?

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问题:

什么是原型法?用原型法开发信息系统有何优缺点?

考点:高级信息系统项目管理师信息系统项目管理师综合练习信息系统项目管理师综合练习题库
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阅读下面短文,根据其内容回答后面所提问题或完成句子。

      People are often killed while crossing the road. Most of these people are old people and children. Old

people are often killed because they usually can not see or hear very well. Children are often killed because

they are not careful. They have to look and listen before they cross the road.

     A car, truck or bus can not stop very quickly. If the vehicle (汽车) is going very fast, it will travel many

meters before it stops. People don't always understand this. They think a car can stop within a few meters.

The faster a car is traveling, the longer it takes to stop. It is very difficult for a person to know how far a car

is traveling. 

     The only safe way to cross the road is to look both ways, right and left. Then if the road is clear, it is

safe to cross. The right way to cross the road is to walk quickly. It is not safe to run. If people run across

the road, they may fall down.

1. Who are often killed while crossing?

                                                                                                                                                       

2. Why are children killed when crossing the road?

                                                                                                                                                       

3. Is it easy for a driver to stop his vehicle when he finds something wrong some meters in front of him?

                                                                                                                                                       

4. What had you better do when you cross the road?

                                                                                                                                                       

5. Even though the vehicle is going very fast, it can stop within a few meters, can't it? 

                                                                                                                                                        

题型:问答题 简答题

有关导体电阻的说法,正确的是(  )

A.粗细相同的两根导线,长度大的,电阻一定大

B.长度相同的两根导线,横截面积小的,电阻一定大

C.铝导线的电阻一定比铜导线的电阻大

D.同种材料制成的长短相同的两根导线,横截面积小的,电阻一定大

题型:问答题 简答题
小明看一本科技书,第一天看了55页,第二天看了全书的
1
3
,第二天看的页数恰好比第一天多20%.这本书一共有多少页?
题型:问答题 简答题

造成霍乱流行的主要因素是()

A.污染水源引起传播

B.菌群致病力增加

C.人群免疫力降低

D.媒介昆虫增多

E.细菌产生耐药

题型:问答题 简答题

当代一历史学家指出:“人类的物质文化在过去的200年中发生的变化远甚于前5000年。”从今天看来,其中最主要的原因是()

①文艺复兴和启蒙运动解放了思想

②地理大发现促进新旧大陆的联系

③科学革命导致一系列新发明出现

④工业革命极大地提高了生产力

A.①②

B.②③

C.③④

D.①④

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