天山-9-4

LunarLin

天山9-Q4:
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.
The argument above requires which of 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 increase 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.

我觉得B是很明显的答案.TAX增加的幅度小,销量下降幅度也小;TAX增加的幅度现在比较大,销量下降幅度也相应增大.正好说明了税后价格跟销量是直接挂钩的.

考试专业户

LunarLin，我觉得你说的对。但是好象大家都认为我们想的不对？

nicole_jiang

我也觉得是B.

A,D都说得是什么啊..题目说的是税后价格与销量的关系,这个税前价格有什么关系呢.我觉得A.D都无关.

二狼神

B为何不对?D怎么跟结论关联?好像D少了点什么?晕啊.

smileday

B,

a) ..."as much as it had"  is a flaw and therefore unnecessary.

d) .."cents" is not equal to " percent"

what a sick question with such sick traps!

顾风

b不对 tax increase 不等于 after-tax price

mymengming

注意读题，特别是文章的最后一句结论句。
“税后价格”和销售量有很大关系，不是税收的数量。B只是说税收的数量和销售量有关，不能说明税后的价格。
A错在不清楚增税前一年的税后价格的变化情况，若是很大的话则正好削弱了结论，若是增加很少（跟8分没有可比性）的话就支持了结论。
D说明增税后，税前价格的减少不会高于8分，也就是税后价格会高于原来的价格，然后导致销售减少，因此支持了结论。

maggiecookies

以下是引用dearjane在2005-9-26 0:23:00的发言：

晕～

题目中给了tax,结论是after-tax price,assumption应该是pretax-price

我选的是A, 掉到陷阱里去了. 上面的分析很经典,支持!

jenniferdsb

以下是引用mymengming在2006-7-17 15:50:00的发言：
注意读题，特别是文章的最后一句结论句。
“税后价格”和销售量有很大关系，不是税收的数量。B只是说税收的数量和销售量有关，不能说明税后的价格。
A错在不清楚增税前一年的税后价格的变化情况，若是很大的话则正好削弱了结论，若是增加很少（跟8分没有可比性）的话就支持了结论。
D说明增税后，税前价格的减少不会高于8分，也就是税后价格会高于原来的价格，然后导致销售减少，因此支持了结论。

explicit explanation!

sun2571

精彩的解释！