GWD-1-13, GWD-1-17 拜求各位nn赐教..........

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? 

1. Florida attracts more people who move from one state to another
        when they retire than does any other state.
2. The number of people who move out of Florida to accept
        employment in other states has increased over the past ten years.
3. There are far more local businesses in Florida that cater to
        tourists than there are local businesses that cater to retirees.
4. The total number of people who retired and moved to another
        state for their retirement has increased significantly over the past ten
        years.
5. 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.

The spacing of the four holes on a fragment
of a bone flute excavated at a Neanderthal campsite is just what is required to
play the third through sixth notes of the diatonic scale—the seven-note musical
scale used in much of Western music since the Renaissance.  Musicologists therefore hypothesize that the
diatonic musical scale was developed and used thousands of years before it was
adopted by Western musicians.

Which of the
following, if true, most strongly supports the hypothesis?

1. Bone flutes were probably the only musical instrument made by
        Neanderthals.
2. No musical instrument that is known to have used a diatomic
        scale is of an earlier date than the flute found at the Neanderthal
        campsite.
3. The flute was made from a cave-bear bone and the campsite at
        which the flute fragment was excavated was in a cave that also contained
        skeletal remains of cave bears.
4. Flutes are the simplest wind instrument that can be constructed
        to allow playing a diatonic scale.
5. The cave-bear leg bone used to make the Neanderthal flute would
        have been long enough to make a flute capable of playing a complete diatonic
        scale.
   
   答案是e. 我想错因在于我没搞懂二三行的意思，拜求赐教
   
   

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GWD-1-13

按照狒狒的杀CR思路，先读问题：“Which of the following, if true, most seriously weakens the argument?”，题目是问的weaken,那么带着削弱的主观印象去读题：在过去的十年，美国所有退休后选择去别的州生活的人中，选择去佛罗里达州生活的人，在十年的时间内下降了3％。因为许多佛罗里达州的商业都是夕阳产业即为退休的老年人服务的，所以这种下降将影响佛州的经济。

d选项可以明显削弱这一论述，如果美国所有退休后选择去别的州生活的总人数增加，既便比例下降，还是有更多的老年人到佛罗里达州消费，佛州夕阳产业会更好。

我们注意到，为了强化其weaken作用，答案中用了significantly，举个例子，十年之前退休的人是100人，有10％去佛罗里达，就是10人。现在100人significantly增加到1000人，既便只有7％的人去佛罗里达，也有70人啊，佛罗里达的夕阳产业爽 毙 了。

1-17

E is right. 

If the bone is long enough to make all notes but there is only four notes, it's proven that the flute was made before the seven-note musical scale was developed.