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题库 / GMATLA-CR-33
Although most smoking-related illnesses are caused by inhaling the tar in tobacco smoke, it is addiction to nicotine that prevents most smokers from quitting. In an effort to decrease the incidence of smoking-related illnesses, lawmakers in Sandonia plan to reduce the average quantity of nicotine per cigarette by half over the next five years. Unfortunately, smokers who are already addicted to nicotine tend to react to such reductions by smoking correspondingly more cigarettes.
The information above most strongly supports which of the following predictions about the effects of implementing the Sandonian government's plan?
The average quantity of tar inhaled by Sandonian smokers who are currently addicted to nicotine will probably not decrease during the next five years.
Sandonian smokers who are not already addicted to nicotine will probably also begin to smoke more cigarettes during the next five years than they had previously.
The annual number of Sandonian smokers developing smoking-related illnesses will probably decrease during the next five years.
The proportion of Sandonians attempting to quit smoking who succeed in that attempt will probably decrease during the next five years.
The number of Sandonians who quit smoking during the next five years will probably exceed the number who quit during the last five years.
推断题
D选项中戒烟的人的百分比信息文中并没有提及未来是会降低/上升
A选项中因为吸烟的人会吸更多数量的烟，因此tar吸入的数量不会下降，正确
Sandonian smokers who are not already addicted to nicotine will probably also begin to smoke more cigarettes during the next five years than they had previously.
argument没有提及未上瘾的群体
supports which of the following predictions about the effects of implementing the Sandonian government's plan
读题
---by ruqi
大多数疾病都是因为吸入香烟中的tar引起的，然而戒烟难是因为对nicotine上瘾。为了减少香烟引起的疾病，计划将每支烟的nicotine减半，但是烟民会因此吸更多的烟。问must be true
choice a, 目前对尼古丁上瘾的烟民吸入的tar总量可能不会减少。correct
choice b, 没有对尼古丁上瘾的烟民可以未来吸更多的香烟。没出现的新事物，错误。
most strongly supports which of the following ...演绎题
大多数疾病都是因为吸入香烟中的tar引起的，然而戒烟难是因为对nicotine上瘾。为了减少香烟引起的疾病，计划将每支烟的nicotine减半，但是烟民会因此吸更多的烟。问must be true
choice a, 目前对尼古丁上瘾的烟民吸入的tar总量可能不会减少。correct
choice b, 没有对尼古丁上瘾的烟民可以未来吸更多的香烟。无法判断
思路：为了减少吸烟引起的疾病，政府打算在未来五年把香烟中尼古丁含量减半，不幸的是，对尼古丁上瘾者会为了应对尼古丁量减少而吸更多的香烟----问：文中信息支持/加强了选项哪个预测----烟量变大了，自然焦油tar的平均吸入量只增不减====这个应该属于if it is true 的题型
下文支持上文，归纳题，只能在原文信息范围里找答案。
这不是支持，这是演绎题
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本题为must be true ，注意题型；因为平均每支烟中的尼古丁含量比以前少，但是tar含量并没有减少，可能造成的结果是尼古丁的吸入量可能比以前少，但是焦油的吸入量一定比以前多。
注意看加强对象，加强的是关于effect的prediction。这个prediction是smoker会抽更多的cigarettes。
这个题目其实就是加强结果的，预测如果为真的话，就会出现吸烟的人会吸更多的数量的烟，因为平均每支烟中的尼古丁含量比以前少，但是焦油含量并没有减少，可能造成的结果是尼古丁的吸入量可能比以前少，但是焦油的吸入量一定比以前多。所以是加强这个预测的结果。这个题目有点tricky，首先tar我不认识，而且完全没有料到用这种加强结果的方式加强。
Not decrease contains increase
答案很明显，要锁定premise
premise1 smokers who are already addicted to nicotine tend to react to such reductions by smoking correspondingly more cigarettes，注意是who are already addicted to nicotine 更D选项中的quit smoking没关系
错选D，attemting to quit smoking的人还有新的开始吸烟的人，文章没有提到这一信息
average quantity of tar inhaled by Sandonian smokers who are currently addicted to nicotine=
X(tar per cigarette)*Y(cigarette总的消费支数)/Z(number of people currently addicted to nicotine)
Y上升，Z因为是已经上瘾的人，所以变化方向只有减少，不可能上升
所以总量变大