求助GWD1-Q13

doreen蝶

GWD1-Q13:

In the United States, of the people who moved from one state to another when they retired, the percentage who retired to Florida has decreased by three percentage points over the past ten years.  Since many local businesses in Florida cater to retirees, this decline is likely to have a noticeably negative economic effect on these businesses.

Which of the following, if true, most seriously weakens the argument?

A. Florida attracts more people who move from one state to another when they retire than does any other state.

B. The number of people who move out of Florida to accept employment in other states has increased over the past ten years.

C. ·There are far more local businesses in Florida that cater to tourists than there are local businesses that cater to retirees.

D. =The total number of people who retired and moved to another state for their retirement has increased significantly over the past ten years.

E. The number of people who left Florida when they retired to live in another state was greater last year than it was ten years ago.

 答案为D

我是这么理解的，退休后去F的人少了---> F地的以退休工人为基础的产业减少--->F处此类产业不景气。D说总全国退休人数增加了。但这并不能推翻结论啊。不知道文章结论是否在说，这类产业在全国范围内不景气呢？可是如果这样的话，前面一大段话根本退不出这个结论啊

 答案为D

我是这么理解的，退休后去F的人少了---> F地的以退休工人为基础的产业减少--->F处此类产业不景气。D说总全国退休人数增加了。但这并不能推翻结论啊。不知道文章结论是否在说，这类产业在全国范围内不景气呢？可是如果这样的话，前面一大段话根本退不出这个结论啊

[此贴子已经被作者于2009-7-14 13:57:39编辑过]

gaojingyaln

以下是引用irisdelis在2009-6-17 14:08:00的发言：

请注意 of the people who....,the percentage who retired to Florida...decreased...D选项正是说基数变大了，所以即便占比变小也不一定导致总结果变小。

注意比列问题在基数方面的处理。

zhaozihan

ding

yonglu101

Ding,很有道理

FFcapm

ding..

ywaidj

比例小，但是产业的基础没有变小，虽然到F的人减少，但是整个国家范围看是增加的，所以不一定会影响F的产业！

走出州门！

leodzw

thanks!