[讨论]Feifei-114

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

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

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

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

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

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

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

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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第一遍做的时候做错了，看了解释好半天才明白过来，又看了看CD上以前的讨论贴，觉得这种题目很搞笑，也没有什么实际意义。考试会考

么？还有，如果在考场上，你能在那么短的时间反应出obese是一个比例么？

越做题，越觉得前途渺茫，最近正确率直线下降，都不知道复习的效果体现在哪儿，郁闷&自信心狂受打击。继续加油！