提高程序的可理解、可修改、可测试的程度，就意味着增强软件件的()。
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一般来说，在管理软件中，软件生存周期各个阶段的工作量以()阶段所占的比例最大。
【C7】
A. it
B. this
C. there
D. that
What did the author s friends try to tell him？
A. It is possible to live a car-free life.
B. There is no need for expensive cars.
C. A car is a necessary part of life.
D. They" 11 follow him if he" s successful.
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