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同题干的两道CR题——帮助消化支持类题目(都是排除他因)
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 cigarettesales is therefore strongly related to the after-tax price of a pack of cigarettes.
Which of the following, if true, could 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 markey than there had been during the previous year.
排除消费者的消费理念改变 导致了销量的改变
The argument above requires which of the following assumptions?
(A)During the year following the tax increase, the pretax price of a pack of cigarettes did not increase by as much as it had during the year prior to the tax increase.
(B)The one percent fall in cigarette sales in the year prior to tax increases was due to a smaller tax increase.
(C)The pretax price of a pack of cigarettes gradually decreased throughout the year before and the year after the tax increase.
(D)For the year following the tax increase, the pretax price of a pack of cigarettes was not eight or more cents lower than it had been the previous year.
(E)As the after-tax price of a pack of cigarettes rises, the pretax price also rises.
排除了税后价格并没有的改变的情况(这个方向很难想,相当于否定了前提)
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