题目内容

You won’t catch the bus unless you run.

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She was so weak that she was out of breath after walking for only a few minutes.

What kind of life do most people enjoy？

I read the local newspapers with great interest every evening.

信息系统的开发经过系统分析、系统设计、系统编程等阶段，是一个_、逐步细化的过程；而测试过程则是依相反顺序安排的，是一个_、逐步集成的过程。