LSAT 求教高手？？？

bob

4. Giselle: The government needs to ensure that the public consumes less petroleum. When things cost more, people buy and use less of them. Therefore, the government should raise the sales tax on gasoline, a major petroleum product.
Antoine: The government should not raise the sales tax on gasoline. Such an increase would be unfair to gasoline users. If taxes are to be increased, the increases should be applied in such a way that they spread the burden of providing the government with increased revenues among many people, not just the users of gasoline.
As a rebuttal of Giselle’s argument, Antoine’s response is ineffective because
(A) he ignores the fact that Giselle does not base her argument for raising the gasoline sales tax on the government’s need for increase revenues
(B) he fails to specify how many taxpayers there are who are not gasoline users
(C) his conclusion is based on an assertion regarding unfairness, and unfairness is a very subjective concept
(D) he mistakenly assumes that Giselle wants a sales tax increase only on gasoline
(E) he makes the implausible assumption that the burden of increasing government revenues can be more evenly distributed among the people through other means besides increasing the gasoline sales tax
答案是A，我选了C。答案A说Antoine忽视了Giselle并没有把增加政府收入作为提高汽油消费税的原因，但是，事实上，提高汽油消费税的确可以增加政府收入，那么客观上，增加消费税的确增加了消费者的负担，这当然可以作为Antoine说Such an increase would be unfair to gasoline users。为什么选A却是表明Antoine’s response is ineffective？？？


14-1-2
2. Garbage in this neighborhood probably will not be collected until Thursday this week. Garbage is usually collected here on Wednesdays, and the garbage collectors in this city are extremely reliable. However, Monday was a public holiday, and after a public holiday that falls on a Monday, garbage throughout the city is supposed to be collected one day later than usual.
The argument proceeds by
(A) treating several pieces of irrelevant evidence as though they provide support for the conclusion
(B) indirectly establishing that one thing is likely to occur by directly ruling out all of the alternative possibilities
(C) providing information that allows application of a general rule to a specific case
(D) generalizing about all actions of a certain kind on the basis of a description of one such action
(E) treating something that is probable as though it were inevitable
答案是C，我选了A。C是什么意思？？？



14-1-7
7. It is not correct that the people of the United States, relative to comparable countries, are the most lightly taxed. True, the United States has the lowest tax, as percent of gross domestic product, of the Western industrialized countries, but tax rates alone do not tell the whole story. People in the United States pay out of pocket for many goods and services provided from tax revenues elsewhere. Consider universal health care, which is an entitlement supported by tax revenues in every other Western industrialized country. United States government health-care expenditures are equivalent to about 5 percent of the gross domestic product, but private health-care expenditures represent another 7 percent. This 7 percent, then, amounts to a tax.
The argument concerning whether the people of the United States are the most lightly taxed is most vulnerable to which one of the following criticisms?
(A) It bases a comparison on percentages rather than on absolute numbers
(B) It unreasonably extends the application of a key term
(C) It uses negatively charged language instead of attempting to give a reason
(D) It generalizes from only a few instances
(E) It sets up a dichotomy between alternatives that are not exclusive
答案是B，我想问究竟B中的那个a key term指什么？？


14-1-18
Each year, an official estimate of the stock of cod in the Grand Banks is announced. This estimate is obtained by averaging two separate estimates of how many cod are available, one based on the number of cod caught by research vessels during a once-yearly sampling of the area and the other on the average number of tons of cod caught by various commercial vessels per unit of fishing effort expended there in the past year ?a unit of fishing effort being one kilometer of net set out in the water for one hour. In previous decades, the two estimates usually agreed closely. However, for the last decade the estimate based on commercial tonnage has been increasing markedly, by about the same amount as the sampling based estimate has been decreasing.
18. If the statements in the passage are true, which one of the following is most strongly supported by them?
(A) Last year's official estimate was probably not much different from the official estimate ten years ago
(B) The number of commercial vessels fishing for cod in the Grand Banks has increased substantially over the past decade
(C) The sampling-based estimate is more accurate than the estimate based on commercial tonnage in that the data on which it relies is less likely to be inaccurate
(D) The once-yearly sampling by research vessels should be used as the sole basis for arriving at the official estimate of the stock of cod
(E) Twenty years ago, the overall stock of cod in the Grand Banks was officially estimated to be much larger than it is estimated to be today
答案是A ，但是没反应过来，求教。


25. Unless negotiations begin soon, the cease-fire will be violated by one of the two sides to the dispute. Negotiations will be held only if other countries have pressured the two sides to negotiate; an agreement will emerge only if other countries continue such pressure throughout the negotiations. But no negotiations will be held until international troops enforcing the cease-fire have demonstrated their ability to counter any aggression from either side, thus suppressing a major incentive for the two sides to resume fighting.
If the statements above are true, and if negotiations between the two sides do begin soon, at the time those negotiations begin each of the following must also be true EXCEPT:
(A) The cease-fire has not been violated by either of the two sides
(B) International troops enforcing the cease-fire have demonstrated that they can counter aggression from either of the two sides
(C) A major incentive for the two sides to resume hostilities has been suppressed
(D) Other countries have exerted pressure on the two sides to the dispute
(E) The negotiations'reaching an agreement depends in part on the actions of other countries.
答案是A，但是，既然问题中说negotiations between the two sides do begin soon，由于文章中说Unless negotiations begin soon, the cease-fire will be violated by one of the two sides to the dispute.，不是应该推出A是正确的吗？实在想不通。

tongxun

第一题：
你想得太深了！要反驳G措施的有效性，必须看青G的前提是什么。G提出的建议能成立的前提是：加价，汽油的消耗就减少。要有效的反驳他，必须指出，加价，消耗没有减少。比如，加价的幅度对人们的消费欲望没有影响，或人们比较有钱，对加个1块2块的不在乎等等。这才是驳斥G。
而选项A，只是说加价对这些人不公平，G有说公平吗？就算是不公平，只要措施有效，G说的就有道理。

tongxun

第二题：
选A是不应该的，因为所有的给出的信息是relevant evidence ，即都是与这个推测相关的。所以其中的irrelevant evidence 是完全不正确的。
这个题目就是将原来一成不变的环卫工人的工作习惯，用到了这个特殊的日子里，推测出了结论（第一句话）=》这就是C。

tongxun

a key term
我认为就是tax
因为作者将整个tax的范围扩展后，（加了7%）才得出他的结论的。

tongxun

14-1-18
我是排除出来的，而且A中的probably也非常吸引人。
(B) The number of commercial vessels fishing for cod in the Grand Banks has increased substantially over the past decade
提干中没有相关的number的信息
(C) The sampling-based estimate is more accurate than the estimate based on commercial tonnage in that the data on which it relies is less likely to be inaccurate
没有说谁more accurate than
(D) The once-yearly sampling by research vessels should be used as the sole basis for arriving at the official estimate of the stock of cod
should be used as the sole 更不应该
(E) Twenty years ago, the overall stock of cod in the Grand Banks was officially estimated to be much larger than it is estimated to be today
这种肯定的信息也没根据

tongxun

25。看起来好象都对。没办法！

bob

tongxun,非常非常感谢，解释得非常清楚准确。
第四题，我明白了，按SUNFLOWER的解释是：设research sample为A1,这次抽样 减少x,commercial sample为A2,这次抽样增加x,averge=(A1+A2)/2,这次抽样averge'=(A1-X+A2+X)/2,so there is not much different from years ago.------is it so?

franklin

最后一题：
是A，因为谈判是不违反的的必要条件，不是充分条件：即不谈判肯定会违反，但如果谈判了，其他条件不满足也可能违反。
注意：UNTILL是必要条件。
GABAGE那题：GENERAL RULE 是指这个规律：after a public holiday that falls on a Monday, garbage throughout the city is supposed to be collected one day later than usual.
SPECIFIC CASE是指this week

bob

franklin,哦，终于明白了。谢谢，非常感谢。