kui-cr-8/10-9

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.

选哪个？为什么？

我觉得应该选d,

这是绝对数和相对数的问题，percentage 下降并不代表总量下降。如果因退休而迁往异地的总人数增加，而迁往florida 的人数不变，percentage也会下降，但并不会对businesses catering to retirees in LACE u1:st="on">FloridaLACE>产生影响。

大家讨论一下

Bingo！

lismiles蛮厉害的吗。

这个题比较简单，是典型的lawyer提示我们的关于percentage的问题。解释的比较清楚。