求解答OG12前面一整套卷子里的25和30逻辑题解释

bunengwangmima

25题选B，可是我想问，a swerving insect不仅可以使得tiger beetles眼睛要处理的信息增多，也可以因为它beetles追它时得不停地转弯，所以也会耗费体力，感到tired啊？？？

30题选C，我觉得也可以从他们middle age搬过去的时候开始锻炼身体变得身体好起来了啊？可以不是weaken.相反，我觉得选项A可以是他因，因为医疗有保障，所以这儿的人要活的长一些，就削弱了因为地形锻炼身体而导致的长寿？？

不懂啊~~求解答。。万分感谢！

sdcar2010

OG-12-25 is a weird question. Its explanation is confusing. Scratch that. However, since the answer choice does not include the possibility of 因为它beetles追它时得不停地转弯，所以也会耗费体力, you do not need to consider the same. Just focus on the 5 answer choices given.

OG-12-30 is a good question. Again, do not bring in your own explanation. Work within the scope defined by the stimulus and the answer choices.

sdcar2010

A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrain makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active lifestyle on people. Clearly, this circumstancee explains the long lives of people in Wistar.
Which of the following, if ture, most seriously weakens the argument?
A. In Bellaria all medical expenses are paid by the government, so that personal income does not affect the quality of health care a person receives
B. The Wistar region is one of Bellaria's least populated regions.
C. Many people who live in the Wistar region have moved there in middle age or upon retirement
D.  The many opportunities for hiking, skiing, and other outdoor activities that Wistar's mountains offer make it a favourite destination for vacationing Bellarians.
E. Per capita spending on recreational activities is no higher in Wistra than is is in other regions of Bellaria.

A is wrong because it makes the WHOLE region of Ballaria equally favorable in terms of health care coverage. That strengthens the the conclusion that it is the exercise activities which lead to the long life span in Wistar region of the Ballaria.

If you pay attention to the stimulus, you would notice the term - the average age at death.

Well, if all the samples are older than 65, the average age at death of the samples cannot be lower than 65, right?

On the other hand, in another region which is a very healthy neighborhood, all people are younger than 65 and every guy who is one day away from his or her 65th birthday dies of car accident, murder, or suicide. Then the average age at death of that neighborhood can never reach 65!

bunengwangmima

嗯嗯，我明白30题A为什么错啦，我没有仔细看~~C选项关于middle age的界限真是不好定义，出题者没有为longevity下一个定义~~

另外，25题的B选项中有说a beetle alters its course while running，追它眼睛要处理的信息增多也是由此推理出来的，太累也可以由此推出，所以我还是不懂为啥Undermines了太累这种情况？？

sdcar2010

middle age is defined by common sense.

breezeheart

LZ, 第30题我跟你的疑惑一模一样... OG的解释是说原文强调的这个lifestyle是从出生之后养成的一生的习惯，所以如果有居民是从middle age之后移居过去的，那就不能support这个lifelong的概念了/
可我怎么看都不觉得原文有强调这lifelong这一点哪...
牵强牵强

bunengwangmima

我觉得可能要看对题干开头说到的Lifestyle的理解，生活方式不是一朝一日形成的，而是一个长久的过程，因此就在一定程度上强调了lifelong的概念，C选项中从middle age或者 upon retirement搬过去，因为从小生活已经养成了习惯，就难以形成另一种lifestyle了。同时，对于这道题，用排除法还是比较容易选出来的，其他选项都明显不对，我当时就是A选项没有认真看才选错的~~~C选项虽然有一些小瑕疵，但相比之下绝对是最好的了！

bunengwangmima

不过关于tiger beetles的题目，后来在prep里我又做到差不多的了，可是还是不能理解啊，觉得排除不了~~~

shirleyon

25题：

A：昆虫飞过来，体力该跟上还是能跟上，该跟不上还是跟不上
视觉同理。
因为没有任何偏向体力或者视觉的障碍

B：在追一种经常改变路线的昆虫的情况下，停顿的更频繁
若是因体力跟不上，则停顿频率应该跟走直线的一样。
如果是视觉跟不上，则要经常看昆虫到底往哪儿飞，则停顿频率更多些
该选项增加了视觉的障碍，而没增加对体力的障碍
排除体力，支持视觉，所以为正确选项

C：在追移动的昆虫的情况下，不管路线是斜向上还是斜向下，停顿一样频繁
体力和视觉都一样，结果相同

D:停顿时，没追上昆虫，就放弃
体力和视觉都一样，结果相同

E:追的越快，停顿越频繁
追的快时，对体力和视觉的影响相同，还是不能区分

aliCD

Mark一下！