lsat-14-4-17,lsat-14-4-19,lsat-14-4-21,lsat-14-4-22

1stzhang

[face=Georgia]17. Recent research shows that hesitation, shifting posture, and failure to maintain eye contact are not reliable indicators in discriminating between those who are lying and those who are telling the truth. The research indicates that behavior that cannot be controlled is a much better clue, at least when the lie is important to the liar. Such behavior includes the dilation of eye pupils, which indicates emotional arousal, and small movements of facial muscles, which indicate distress, fear or anger.

Which one of the following provides the strongest reason for exercising caution when relying on the "better" clues mentioned above in order to discover whether someone is lying?

(A) A person who is lying might be aware that he or she is being closely observed for indications of lying

(B) Someone who is telling the truth might nevertheless have a past history of lying

(C) A practiced liar might have achieved great control over body posture and eye contact

(D) A person telling the truth might be affected emotionally by being suspected of lying or by some other aspect of the situation

(E) Someone who is lying might exhibit hesitation and shifting posture as well as dilated pupils

这个题目没有思路?大。答案是 D.

Orthodox medicine is ineffective at both ends of the spectrum of ailments. At the more trivial end, orthodox medicine is largely ineffective in treating aches, pains and allergies, and, at the other extreme, it has yet to produce a cure for serious, life-threatening diseases such as advanced cancer and lupus. People turn to alternative medicine when orthodox medicine fails to help them and when it produces side effects that are unacceptable to them. One of the reasons alternative medicines is free of such side effects is that it does not have any effects at all.
19. The charge made above against alternative medicine is most seriously weakened if it is true that

(A) predictions based on orthodox medicine have sometimes failed, as when a patient has recovered despite the judgment of doctors that an illness is fatal

(B) alternative medicine relies on concepts of the body and of the nature of healing that differ from those on which orthodox medicine is based

(C) alternative medicine provides hope to those for whom orthodox medicine offers no cure

(D) a patient's belief in the medical treatment the patient is receiving can release the body's own chemical painkillers, diminish allergic reactions, and promote healing

(E) many treatments used for a time by orthodox medicine have later been found to be totally ineffective

答案是D,我觉得D有些象无关,也有点象他因.请讲解D是如何削弱的??

21. The town of Greenfield recently instituted a substantial supplementary tax on all households, whereby each household is taxed in proportion to the volume of the trash that it puts out for trash collectors to pick up, as measured by the number of standard-sized garbage bags put out. In order to reduce the volume of the trash on which their tax bill is based, Greenfield households can deliver their recyclable trash to a conveniently located local commercial recycling center, where such trash is accepted free of charge

The supplementary tax provides some financial incentive to Greenfield households to do each of the following EXCEPT

(A) Sort out recyclable trash thoroughly from their other trash

(B) Dump nonrecyclable trash illegally at parks and roadsides

(C) Compress and nest items of nonrecyclable trash before putting them out for pickup

(D) Deliver recyclable materials to the recycling center instead of passing them on to neighbors who want to reuse them

(E) Buy products without packaging or with recyclable rather than nonrecyclable packaging

答案是D,那么B是如何从原文得出的.

22. In a survey of consumers in an Eastern European nation, respondents were asked two questions about each of 400 famous Western brands: whether or not they recognized the brand name and whether or not they thought the products bearing that name were of high quality. The results of the survey were a rating and corresponding rank order for each brand based on recognition, and a second rating-plus-ranking based on approval. The brands ranked in the top 27 for recognition were those actually available in that nation. The approval rankings of these 27 brands often differed sharply from their recognition rankings. By contrast, most of the other brands had ratings, and thus rankings, that were essentially the same for recognition as for approval

Which one of the following, if each is a principle about consumer surveys, is violated by the survey described?

(A) Never ask all respondents a question if it cannot reasonably be answered by respondents who make a particular response to another question in the same survey

(B) Never ask a question that is likely to generate a large variety of responses that are difficult to group into a manageable number of categories

(C) Never ask all respondents a question that respondents cannot answer without giving up their anonymity

(D) It is better to ask the same question about ten different products than to ask ten different questions about a single product

(E) It is best to ask questions that a respondent can answer without fear of having gotten the answer wrong

这个题目作对了但是有猜测的原因,请讲解?答案是A[/face]

mindfree

1. 根据原文的意思可以推出. 文中说不应该依赖hesitation, eye contact来测谎,而应该根据一些不能控制的行为如瞳孔扩张和面部肌肉的movement来判定. 又近一步指出这些uncontrollable behavior反映了emotion. 问题问为什么要慎用这种方法.

A. 原文没有指出being closely observed对文中的概念有任何影响,无关
B. 原文没有解释有撒谎史对文中概念的影响, 无关
C. 加强了原文对此方法的推崇, 错.
D. 说明不撒谎的人在emotion上会受影响, 和原文对说明的此方法以来emotion的变化直接相关
E. 相关但是不weaken原文的推论

2. 原文说alternative没有任何效果, 问weaken. D指出(alternative本身可能没有效果,)病人在知道他们被治疗时自身会....,达到治疗效果. 所以weaken.

3. 根据问题, 只要能使得居民少付tax就不是答案.
B. 如果把垃圾扔到那些地方,居民就不用给collector,也就不用付tax.
D. 两种情况对居民tax的影响没有区别,答案.

4. A对是因为被survey的人被问及他们不熟悉的品牌(第一个问题), 然后还被问到对这些品牌的品质(第二个问题). 第二个问题不可能reasonably answered. 所以A正确.