［分享］美国逻辑课堂资料分享( 更新文档09 和11 )

jessieanna0088

great
have a change on mind

Leah08

谢谢LZ

pterosaur1988

感谢楼主

loveit

感谢 好人啊@

yaohuan529

thanks a lot

lioncitydream

thanks

achette

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 major studies all produce similar results, those studies must be accurate.
?B) North American children have been progressively less 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.

这个是第7个PPT里面的题目，给出的答案是C，不晓得是为什么呢？能解答下吗？

superclaycd

顶！！！

angle4410855

严重感谢。。。。

mizzly19

thanks a loooooooooooooooooooooot~