问两道逻辑题，望牛牛们帮忙

bob9603

哦，这样啊，那第一个怎么个情况，是不是答案有问题？

-- by 会员 melody1101 (2012/4/1 22:40:33)

lz好，第一题答案是错的~第二题是解释题，文中说了这种东西的特点，而最后的结论是支持用这种东西。那么很显然，一定要利用前面的资料支持，因为这是唯一我们能用的已知条件支持专家用这个东西。

很显然，这个东西：1，贵~~~~~   2， 2周后才有作用~~
那就看选项吧，就你这两个而言，请看答案，B说什么天气啥的，并且提到了重点即“2周后”的改写——3到6周~~ 且说什么天气不变在3到6周，那么很显然，这可以成为专家支持的原因。（ps：其实你都不用弄懂这是什么意思，你只需要知道找到一个选项，支持专家，即给人的感觉是：“专家说的还就是那么回事儿~！”）

韩啸0508

题目，是prep里的吧，问Which of the following is information provided by the passage? 这类题并不能完全称之为 归纳题， 归纳题要求是conclusion，而本题更类似于must be true，这两者的区别在于conclusion要归纳出中心，must be true只需要和原文内容相符就行了，也就是说， must be true可以是题目之中一句的改写。
本题 其实答案是Transnational cooperation among companies is experiencing a modest recovery among United States firms这句话的改写， 该句的愿意是说，T coop在经历一段modest recovery 温和的复兴。
这里运用一下，想象力 ，一条U型曲线， T coop 从 最开始的高位，降到低位，现在在缓步上升中， 换句话来说，它曾经很高过，也很低过，现在在上升但不高也不低； 答案的意思是 T coop 和现在相比，在过去也more common 过（即高）， 也less common过（即低）。

wly1202m

1. Finland imposes a high tariff on the export of unprocessed hazel nuts in order to ensure that the nuts are sold to domestic processing plants. If the tariff were lifted and unprocessed hazel were sold at world market prices, more farmers could profit by growing hazels. Nevertheless, since all the processing plants are in urban areas, removing the tariff would seriously hamper the government's effort to reduce urban unemployment over the next ten years.
削弱
A. Some of the by-products of processing hazels are used for manufacturing plants and plastics.
B. Other countries in which hazels are processed subsidize their processing plants.
C. More people in Finland are engaged in farming hazels than in processing them.
D. Buying unprocessed hazels at lower than would market prices enables hazel processors in Finland to sell processed nuts at competitive prices.
E. A lack of profitable crops in driving an increasing number of small farmers in Finland off their land and into the cities.

这题我早上恰好分析了下，我和那位大大的想法有点不太一样.
我觉得E是他因同果的削弱.  题目中的conclusion是降低tariff，会导致失业率上升.
而E选项是说，失业率上升，是因为缺乏有收益的crops导致农民进城，而不是因为税收下降.

你觉得这个解释会不会更好？

melody1101

1. Bank depositors in the USA are all financially protected against bank failure since the government insures all individuals'bank deposits. An economist contends that this insurance is in part responsible for the high rate of bank failures, as it removes from depositors any financial incentive to find out whether the bank that holds their money is secure against failure. If depositors were more selective, then banks would have to be secure to compete for depositors' money.

The economist's argument makes which of the following assumptions?

答案是Potential depositors are able to determine which banks are secure against failure.
我选的是The difference in the interest rates paid to depositors by different banks is not a significant factor in bank failures.

2.Political advocacy groups have begun to use information services to disseminate information that is then accessed by the public via personal computer. Because many groups thus can bypass tradional news sources, whose reporting is selective and to present their political opinions directly to the public, information services present a more balanced depiction of the complexities of political issues than any tradional news source presents.

Which is an assumption on which the argument above depends？
答案是：informatin on political issues desseminated through information services does not come almost entirely from advocacy groups that share a single bias.
我选的是：Traditional news sources seldom report the opinions of political advocacy groups accurately.

3. A great number of complex repair jobs carried out by Bec Repairs have to be rewarded under the company's warranty. The reworked jobs are invariably satisfactory. Thus when initial repairs are not adequate, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

假设是？
答案是：There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
我选的是：Bec Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be rewarked.

韩啸0508

总的来说，关于assumption这种问题，一定要分清 无关 选项。
第一个 潜在顾客有能力辨别哪家银行是安全  ， 刚好填补了 If depositors were more selective, then banks would have to be secure to compete for depositors' money. 说明 顾客的more selective。 而你的答案 银行间利率的差别不会显著影响， 是个无关选项。
第二个， 结论的关键是 information service 对于 political更加balance。答案 说明 这些information service 提供的information不是来自于同一种政治观点 share a single bias.  你的那个 还是与结论无关。
第三个 文中说not because the mechanics lack competence，那就 mechanics的问题，答案补充说 两组工作人员体系上是没有差别的， 你的那个 无关

这里补充一下 关于 无关 即out of scope
Out of Scope Answers. These answers simply miss the point of the argument and support issues that are either unrelated to the argument or tangential to the argument
再补充一下 strength和 assumption的区别
Strengthen questions ask you to support the argument in any way possible. This type of answer has great range, as the additional support provided by the answer choice could be relatively minor or major. Speaking in numerical terms, any answer choice that strengthens the argument, whether by 1% or by 100%, is correct.
Assumption questions ask you to identify a statement that the argument assumes or supposes. An assumption is simply an unstated premise—what must be true in order for the argument to be true. An assumption can therefore be defined as what is necessary for the argument to be true.
这三段 都是从powerscore 的 LSAT  摘下来的 ，如果有空的话， 好好看看这本书，写的很好，作者编的很用心，条理很清楚，讲解很详细。CD 上有下载

melody1101

The FMD, foot and mouth disease is caused by a virus transmitted to humans by deer ticks. Generally deer ticks pick up the virus while in the larval stage by feeding on infected black mice. However, certain other species on which the larvae feed do not harbor the virus. If the population of these other species were increased, more of the larvae would be feeding on uninfected hosts, so the number of ticks acquiring the virus would likely decline.

答案是：Whether the deer tick population's size is currently limited by the capability of animals for the tick's larval stage to feed on
我选的：Whether deer ticks that were not infected as larvae may become infected as adults by eating the deers on which infected deer ticks have fed.

韩啸0508

这个题 幼鹿吃了会感染，但是other species吃了不会感染，结论是如果other species 数量增加，更多的幼鹿就吃uninfected hosts（ black mice ），这样，感染的ticks（幼鹿） 就会减少。
这是一个 自带条件的结论， 评价的部分 感染幼鹿的数量受到 capability of animals for the tick's larval stage to feed on（幼鹿吃mice的能力）的限制 即说明当幼鹿吃的infected black mice减少时（或是more of the larvae would be feeding on uninfected hosts），the number of ticks acquiring the virus would likely decline
选项 刚好回答了 结论自带的条件
你的答案 幼鹿不感染但是成年后可能感染 是无关的

melody1101

On pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but pupulations of the species are more stable in rural areas far from human settlement. The house gecko does not attack the nourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.

Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
答案是: In places where there are lighted buildings, insects tend to gather around the light.
我选的是: In urban areas, geckos are valued because they eat so many insects.

Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.

削弱
答案是: Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge.
我选的是: When airlines dramatically reduce their fares on a particular route, the total number of air passengers in that route increases greatly.

韩啸0508

第一题，答案错了，你选的是对的，灯光影响壁虎吃虫。
第二题，压价竞争不会有利，因为一旦压价成功，任何补偿先前损失的加价行为都会给竞争对手一个低价出售的机会。
如果要削弱，就要说明，压价竞争是有用。
答案， 航空高管普遍认为一家公司如果曾经减过价，就极有可能在新的竞争对手出现的时候，再次减价（那么，一旦有竞争就减价，就不会再recoup的时候给对手机会了）
你的 当空航空公司急剧减价时，总的乘客人数会增加（这个是加强了，减价有利可图，人数增加，虽然价钱低了，总收入并不应定会减少）

melody1101

额，第一个我选的不是灯光的那个。。。您是不是看错了