LSAT-14-4-9,LSAT-14-4-12,LSAT-14-4-14

1stzhang

[face=Georgia][face=Arial]Oscar: Emerging information technologies will soon make speed of information processing the single most important factor in the creation of individual, corporate, and national wealth. Consequently, the division of the world into northern countries ?in general rich ?and southern countries ?in general poor ?will soon be obsolete. Instead, there simply will be fast countries and slow countries, and thus a country's economic well-being will not be a function of its geographical position but just a matter of its relative success in incorporating those new technologies

Sylvia: But the poor countries of the south lack the economic resources to acquire those technologies and will therefore remain poor. The technologies will thus only widen the existing economic gap between north and south.

9. The reasoning that Oscar uses in supporting his prediction is vulnerable to criticism on the ground that it

(A) overlooks the possibility that the ability of countries to acquire new technologies at some time in the future will depend on factors other than those countries' present economic status

(B) fails to establish that the division of the world into rich countries and poor countries is the single most important problem that will confront the world economy in the future

(C) ignores the possibility that, in determining a country's future wealth, the country's incorporation of information-processing technologies might be outweighed by a combination of other factors

(D) provides no reason to believe that faster information processing will have only beneficial effects on countries that successfully incorporate new information technologies into their economies

(E) makes no distinction between those of the world's rich countries that are the wealthiest and those that are less wealthy

其他的答案肯定不对,但是c/d我没有分出.答案是C,我选D


Beverage company representative: the plastic rings that hold six-packs of beverage cans together pose a threat to wild animals, which often become entangled in the discarded rings and suffocate as a result. Following our lead, all beverage companies will soon use only those ring consisting of a new plastic that disintegrates after only three days' exposure to sunlight. Once we all complete the switchover from the old to the new plastic rings, therefore, the threat of suffocation that plastic rings pose to wild animals will be eliminated.

12. Which one of the following, if true, most seriously weakens the representative's argument?

(A) The switchover to the new plastic rings will take at least two more years to complete

(B) After the beverage companies have switched over to the new plastic rings, a substantial number of the old plastic rings will persist in most aquatic and woodland environments

(C) The new plastic rings are slightly less expensive than the old rings

(D) The new plastic rings rarely disintegrate during shipping of beverage six-packs because most trucks that transport canned beverages protect their cargo from sunlight

(E) The new plastic rings disintegrate into substances that are harmful to aquatic animals when ingested in substantial quantities by them

我认为B/E都是削弱,答案是B.


14. Some of the world's most beautiful cats are Persian cats. However, it must be acknowledged that all Persian cats are pompous, and pompous cats are invariably irritating.

If the statements above are true, each of the following must also be true on the basis of them EXCEPT:

(A) Some of the world's most beautiful cats are irritating

(B) Some irritating cats are among the world's most beautiful cats

(C) Any cat that is not irritating is not a Persian cat

(D) Some pompous cats are among the world's most beautiful cats

(E) Some irritating and beautiful cats are not Persian cats
我觉得五个答案都对,E说的不好而已.虽然作对,还是请讲解.[/face][/face]

mindfree

1. D其实是在意思上有误. D说没有说明faster information对incorpoate此项技术的国家只有好处.在这里有没有坏处不是讨论范围. 举了例子:一个人中$88MM彩票了, 他就一辈子有花不完的钱了.问逻辑错误.这里就只能局限于钱上. 比如说他就要交55%的税,亲戚都来替他花,或是这种人99%都投资破产等. 答案决不会是说他可能一高兴,死翘翘了.虽然这是一个危害,但不影响原文的逻辑.

2. E是典型的错误选项. 还是一个局限的问题. 你要理解原文的逻辑范围. 如果原文是讲总体的危害性, E就是正确答案. 比如说把题目改成:改用了新的ring,对环境和野生动物的危害就会消失.在此题中原文的逻辑关系是:complete the switchove-->the threat of suffocation will be eliminated. E中设计的毒害问题就是out of scope. 不在讨论范围. 既:即使新的ring会造成毒害,suffocation的问题可能被解决了. 这样就起不到weaken的作用.

3. must be true的题目正确答案都可以根据原文的逻辑关系顺推. 错误选项可以通过举反例来严证. 只要是原文没有提到的都可能发生(当然也可能不发生), 比如说我们可以假设所有的irritating cats都是persian, 虽然这是从原文推不出来的, 但是原文并没有否定此假设, it will be safe to make such assumption. 进而推出E可能错.

其它选项都可以从原文逻辑正推出来.