2021年12月英语四级阅读考试训练282021年6月英语四级考试答案.doc
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1、2021年12月英语四级阅读考试训练28 2021年6月英语四级考试答案Each for its own reason, the study of residential mobility has been a concern of three disciplines: sociology, economics, and geography.For the economist, residential shifts provide a means for studying the housing and land markets.Geographers study mobility to un
2、derstand the spatial distributions of population types.For the sociologist, interest in residential mobility has two sources: one stemming from the study of human ecology and the other, from a concern with the peculiar qualities of urban life.Of course, there are clearly overlapping concerns and it
3、is often difficult to discern the disciplinary origins of a researcher by only e_amining the kinds of questions he or she raises about mobility although it is usually easier to identify a researchers discipline by noting the methods used and the concepts employed. Urban mobility first appears in the
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