麻烦讲解

scholar

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. （意思没看懂，求翻译，谢谢）

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

pexi

这是逻辑吧。。。怎么搞到语法来了。。

斑竹一会就来了，哈哈

这题题干说:1. 北美“肥胖的孩子”在不断增加; 2.“肥胖的孩子”的定义：所有人口的25%是肥胖，85%是正常；

如果25%的数量增加了，一定是人口总数增加了，随之85%的数量-既正常人的数量也应该增加；

所以选C