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下面是小编为大家搜索整理的有关新gre作文备考素材，gre写作是美国所有作文考试中质量要求最高的一类作文考试，改革后的新gre作文写作题目更加具体，考察考生完成题目的过程中是能够融合批判性思维和分析性写作能力，所以我们平时除了增强语言功底的同时还要注意素材的积累和提高勤于思考分析的能力。 29 社会机动性与社会地位 In sociology, social stratification is the hierarchical arrangement of social classes, castes and strata within a society. While these hierarchies are not universal to all societies, they are the norm among state-level cultures . Status can be changed through a process of Social Mobility. Social mobility is the change of position within the stratification system. A change in status can be done upwardly in status, upward mobility, or they can move down in status, downward mobility. Social mobility allows for a person to move to another social status other than the one they were born in. Social mobility is more frequent in societies where achievement rather than ascription is the primary basis for social status. 32 工业化带来的问题 Industrialization has spawned its own health problems. Modern stressors include noise, air, water pollution, poor nutrition, dangerous machinery, impersonal work, isolation, poverty, homelessness, and substance abuse. Health problems in industrial nations are as much caused by economic, social, political, and cultural factors as by pathogens. Industrialization has become a major medical issue world-wide. | 
