一道JJ 4 大家讨论讨论

ohayo

Researchers took a group of teenagers who had never smoked and for one year tracked whether they took up smoking and how their mental health changed.     Those who began smoking within a month of the study’s start were four times as likely to be depressed at the study’s end than those who did not begin smoking.     Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood, it is likely that smoking contributes to depression in teenagers.fficeffice" />
    
Which of the following, if true, most strengthens the argument?



A     Participants who were depressed at the study’s start were no more likely to be smokers at the study’s end than those who were not depressed.
B     Participants who began smoking within a month of the study’s start were no more likely than those who began midway through to have quit smoking by the study’s end.
C Few, if any, of the participants in the study were friends or relatives of other participants.
D Some participants entered and emerged from a period of depression within the year of the study.
E The bait that most people use when fishing for whitefish on the Great Lakes is not attractive to ruffe.


which one is better , why ?    

weiyu

A;


典型的B,A性论述：


N对人脑有损害＋抽烟－＞调查（月初到月末的一个月），抽烟的比不抽烟的更多的depressed.


A说depressed的人不会更原意在月初去抽烟，如果不是这样，那就是因果导致了．


B,C,D,E无关

ohayo

抱歉, E 我是抄串了, 累啊.

snow_mountain

同意A。 我还说呢，这个E是怎么回事呀？呵呵。

jnlvo

ohayo


那E是什么呢？不会比A还强吧?

delldell

A, 同意

ohayo

不会， A就挺好的。