Which of the following statements is true？_以下哪个语句是正确的？____（）
A. Software company can always make more money from software development than from mainteannce
B. A software system goes through its life cycle, like a human being goes through his/her birth to death
C. Software company can make no or little money from software maintenance
D. Software development is more important than maintenance
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Which of the following is not software ？__以下哪项不是软件？ __（）
A. testing plan
B. users
C. contract
D. requirements documents
In which of the following phases of software development is it the cheapest to fix a fault？_在软件开发的以下哪个阶段解决故障最廉价？_（）
A. The integration phase
B. The design phase
C. The implementation phase
D. The maintenance phase
Which of the following should be treated as a separate phase of software life cycle？__下列哪一个应该被视为软件生命周期的单独阶段？____（）
A. Testing
B. Project Planning
C. Implementation and integration
Documenting
Which of the following statements about computer science and software engineering is correct？__关于计算机科学和软件工程的以下语句哪个是正确的？____（）
A. Computer scientists and software engineers care about the same thing
B. Software engineers always try to find all kinds of solutions for the target software system
Computer scientists’ job is to find the most suitable solution for software system
D. The relationship between Computer Science and Software Engineering is just like the one between Chemistry and Chemical Engineering
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