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. 答案是D
我选了C。我觉得C说当地的公司很多是提供给tourists的，所以retiree减少也不会影响他们的经济效益。D我就搞不明白了 谢谢NN们啦~~~~~~~~~~~~~~作者: 棒棒dudu 时间: 2010-6-15 15:58
up ~! I feel confused !! I chose C too作者: jocker 时间: 2010-6-15 20:45
本题的考点是百分比问题。
即使百分比下降了，但如果总的退休人数上升的话，原文的结论就不成立了。
再看C选项，注意题目的结论就是关于“these businesses“的，所以C属于无关比较。作者: sarlene 时间: 2010-7-13 21:51
應該可以這樣理解，如果把all of the people who retired 的人當做A 那麼 the percent is supposed of B% 所以全部 退休並且到FLO的人數 應該是A*B 那些企業會受到經濟損失，因為人數少了， 同時人數就是A*B，如果B減少了，但是A變多了的話，A*B不一定變小吧？ 所以就削弱了結論。。。作者: herminliu 时间: 2010-7-13 22:14
GMAT看到比例就要想到数量，看到数量就要想到比例问题