What is the passage mainly concerned? What are the three ways in which mass transportation revised the social and economic fabr

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问题 What is the passage mainly concerned?
What are the three ways in which mass transportation revised the social and economic fabric of the American city? They are the acceleration of______, ______ and ______.

选项

答案expansion,division,instability

解析 此题与主旨相关。第一段中介绍了公共交通从三个方面改变了城市的社会和经济结构,因此我们可以经过总结与归纳后用上述三个词进行概括,从而符合答题要求。
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