GMAT逻辑题练习及答案(367)

2017-08-30 11:17

来源：新东方在线

作者：

　　GMAT逻辑题目:

　　The number of North American children who are obese-that is,who have more body fat than do 85 percent of North American children theirage---is steadily increasing, according to four major studies conducted overthe past 15 years.

　　If the finding reported above is correct, it can be properlyconcluded that

　　A. when four majorsstudies all produce similar results, those studies must be accurate

　　B. North Americanchildren have been progressively less physically active over the past 15 years

　　C. the number ofNorth American children who are not obese increased over the past 15 years

　　D. over the past 15years, the number of North American children who are underweight has declined

　　E. the incidence ofobesity in North American children tends to increase as the children grow older

　　参考答案：C

　　思路：先看选项做分析

　　A. 归纳太偏。

　　B. 文中没有提到。

　　C. 正确，理解思路是obese是一个比例，不是具体的数据，即15%，如果obese的人数增长，说明children的总人数增加，因此本答案正确，个人认为本题不是一个好题目，但是有可能是一个类型题目的代表，相当于a占整体的一个固定比例，b占整体的一个固定比例，a和b不一定加起来就是整体，根据a数据的变化推断b数据的变化。

　　D. 易混淆，出现新名词underweight，文中没有提到。

　　E. 无关。

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