问题 单项选择题

软件可行性分析是着重确定系统的目标和规模。对功能、性能及约束条件的分析应属于下列哪种可行性分析

A.经济可行性分析

B.技术可行性分析

C.操作可行性分析

D.开发可行性分析

答案

参考答案:B

解析: 可行性分析的主要内容是经济可行性分析、技术可行性分析和操作可行性分析。选项A经济可行性分析是指估计开发费用以及新系统可能带来的收益,将两者进行权衡,看结果是否可以接受;选项B技术可行性分析是指对要求的功能、性能以及限制条件进行分析,故为正确答案;选项C操作可行性分析判断系统的操作方式在该用户组织内是否可行,不符合题目要求;选项D开发可行性分析,不是软件可行性分析的内容。

阅读理解

阅读理解。

     Lots of people like diving into water, because they can explore the underwater world. But there is not

her kind of diving. Some people dive into the sky! This is really a very exciting sport. A skydiver goes high up in the air on a plane. Then he jumps off the r)lane and floats in the air with the help of a parachute(降落伞). A parachute is like a huge umbrella. It is put on the back of the skydiver. When the skydiver reaches a certain height, he will pull a string and the parachute will open up in seconds and carry him gently down

to the ground. Skydivers like doing a lot of fascinate tricks in the air. After jumping off the plane one after

another, they will try to stay in the air and hold each other's hands. They can form different shapes.

     Is it safe to do skydiving?Yes, as long as we receive right training.But sometimes, accidents do happen. In Canada, two skydivers were killed in 1991 when they jumped off the plane. Because their parachutes

got tied up with each other, the parachutes couldn't open up and both crashed down and died.

1. Why do people like diving into water?

                                                                    

2. How does a skydiver go up into the sky?

                                                                    

3. What does a parachute look like?

                                                                    

4. Where does a skydiver put his parachute?

                                                                    

5. Why were two skydivers killed in Canada?

                                                                    

6. What do you think of skydiving?

                                                                         

选择题