难易程度：★★★★
题目题材：商业
gre argument75题目：
The following appeared in a newsletter about health.
"The proportion of children in the United States who are overweight is greater now than ever before. Obesity rates among children have been increasing since the 1970's(2), and during that same time period, the proportion of children living in suburbs has increased(1). Whereas children in rural areas tend to have outdoor active chores and children in cities often walk to school or other places they need to go, children in suburbs are typically driven everywhere. Thus the increase in childhood obesity is probably due mainly to the suburbanization of America and the associated decrease in the opportunities children have for exercise(3,4)."
提纲：
(1)The author fails to establish a causal relationship between living in suburbs and obesity of children.
(2)The author does not provide the obesity rates among children who live in suburbs, rural areas and cities, respectively.
(3)No evidence is provided to show that children in suburbs have no sufficient opportunities for exercise.
(4)The author unfairly assumes that the lack of exercise will necessarily lead to obesity.
注：题目中括号里的数字表明这句话体现的是提纲中第几号缺陷。
无论是gre issue还是gre argument，考生都应该养成写提纲的习惯。这种提纲式的gre写作练习可以帮助考生锻炼写作的逻辑性，而gre写作高分最重要的得分依据就是作文的逻辑性要强。
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