OG115

115. Many people argue that tobacco advertising plays a crucial role in causing teen-agers to start or continue smoking. In Norway, however, where there has been a ban on tobacco advertising since 1975, smoking is at least as prevalent among teen-agers as it is in countries that do not ban such advertising. Which of the following statements draws the most reliable conclusion from the information above?
(A) Tobacco advertising cannot be the only factor that affects the prevalence of smoking among teen-agers.
(B) Advertising does not play a role in causing teen-agers to start or continue smoking.
(C) Banning tobacco advertising does not reduce the consumption of tobacco.
(D) More teen-agers smoke if they are not exposed to tobacco advertising than if they are.
(E) Most teen-agers who smoked in 1975 did not stop when the ban on tobacco advertising was implemented.
the key：A

og解释为:

since no information is given about what effect, if any, the Norwegian ban on tobacco advertising had on teenage smoking in Norway, none of choices B through E can be concluded, since each makes some claim about the effects of tobacco advertising , or of banning such advertising, on teenage smoking or on tobacco consumption.

我的问题是原文中提到In Norway, however, where there has been a ban on tobacco advertising since 1975, smoking is at least as prevalent among teen-agers as it is in countries that do not ban such advertising.不就说明 what effect the Norwegian ban on tobacco advertising had on teenage smoking in Norway了吗??为什么说B到E都因为这点错???

题是conclusion题,要你归纳,不是解释. B和E虽然都解释了文章的现象,但是都不是从文章的现象里推出来的啊.文章说了两件事,第一,many people argue that(注意!!argue 归argue,这不是个客观存在的事实!)广告应该对年轻人有影响的;第二,广告前后挪威年轻人抽烟一样普遍.问这样两件事你能推出什么?你只能推出除了广告外还有其他影响因素(否则为什么广告前后不变呢),至于B广告没有任何影响--从哪里推出来的?前后不变就一定是没有影响?这是不相等的.E大多数人不抽了--又是从哪里推出来的?文章说广告前后没影响,哪里可以看出来不抽了?

归纳题的答案一定是和原文给的信息都有关的.A+B才能推出答案,光A和光B都是不行的,除非是问"文章提供了哪些information",才可以从局部信息推结论.