75. (33198-!-item-!-188;#058&007254)
In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent. In contrast, in the year prior to the tax increase, sales had fallen one percent. The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.
Which of the following, if true, would most strengthen the argument above?
A. During the second year after the tax increase, cigarette sales increased by a significant amount.
B. The information available to consumers on the health risks of smoking remained largely unchanged in the period before and after the tax increase.
C. Most consumers were unaware that the tax on cigarettes was going to increase.
D. During the year following the cigarette tax increase, many consumers had less income, in inflation-adjusted dollars, than they had had in the previous year.
E. During the year after the tax increase, there was a greater variety of cigarettes on the market than there had been during the previous year.
B实在很像是无关阿...虽然其他选项似乎都没支持，但是B好难选的下手
有nn可以帮忙解释一下吗
我也觉得像是排除他因，但感觉说不好
请NN指教
我想问一下，D的解释是消费者的收入在税提高后，比在税提高之前还要少
而购买力下降，这样的话不就加强了吗??因为税提高的关系而影响到销售量
我一直绕不出来阿 @@ 请nn帮帮忙感谢~~
D 其实是削弱
消费者的收入下降，购买力下降，造成香烟销售下降。这恰恰说明了不是因为香烟价格上升造成销售下降的。换一种说法可能更清楚，就算香烟价格不上升，消费者收入下降也会造成香烟销售下降，也就是香烟价格没啥影响了，削弱原文结论。削弱方式为：他因削弱！
B 是加强
消费者对香烟危害的了解程度不变。即排除了因为消费者更加了解香烟危害，造成香烟销售下降的可能。加强方式为：排除他因！
那请问A选项为什么不对呢？
第二年因为没有税收的影响所以较今年销量上去啦~
典型的无因无果嘛
LinsonLi 发表于 2009-4-15 12:36
D 其实是削弱消费者的收入下降，购买力下降，造成香烟销售下降。这恰恰说明了不是因为香烟价格上升造成销售 ...
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