19 Many people change their wills on their own every few years, in response to significant changes in their personal or financial circumstances. This practice can create a problem foe the executor when these people are careless and do not date their wills: the executor will then often know neither which one of several undated wills is the most recent, nor whether the will drawn up last has ever been found. Therefore, people should not only date their wills but also state in any new will which will it supersedes, for then there would not be a problem to begin with.
The reasoning in the argument is flawed because the argument
(A) treats a partial solution to the stated problem as though it were a complete solution.
(B) Fails to distinguish between prevention of a problem and successful containment of the adverse effects that the problem might cause.
(C) Proposes a solution to the stated problem that does not actually solve the problem but merely makes someone else responsible for solving the problem.
(D) Claims that a certain action would be a change for the better without explicitly considering what negative consequences the action might have.
(E) Proposes that a certain action be based on information that would be unavailable at the time proposed for that action. 我根本就没有看懂这个题目，请解释一下这个题目！！
下面是两个归纳，请各位朋友细讲一下，主要是你们的一些思路和其他一些混淆答案不对的原因： 20. Some flowering plant species entirely dependent on bees for pollination, lure their pollinators with abundant nectar and pollen, which are the only source of food for bees. Often the pollinating species is so highly adapted that it can feed from-and thus pollinate-only a single species of plant. Similarly, some plant species have evolved flowers that only a single species of bee can pollinate-an arrangement that places the plant species at great risk of extinction. If careless applications of pesticides destroy the pollinating bee species, the plant species itself can no longer reproduce.
The information above, if true, most strongly supports which one of the following?
(A) The earliest species of flowering plants appeared on Earth contemporaneously with the earliest bee species.
(B) If the sole pollinator of a certain plant species is in no danger of extinction, the plant species it pollinates is also unlikely to become extinct.
(C) Some bees are able to gather pollen and nectar from any species of plant.
(D) The blossoms of most species of bees and do not attract others.
(E) The total destruction of the habitat of some plant species could cause some bee species to become extinct.
22. Only an expert in some branch of psychology could understand why Patrick is behaving irrationally. But no expert is certain of being able to solve someone else’s problem. Patrick wants to devise a solution to his own behavioral problem.
Which one of the following conclusions can be validly drawn from the passage?
(A) Patrick does not understand why he is behaving in this way.
(B) Patrick is not an expert in psychology.
(C) Patrick is not certain of being able to devise a solution to his own behavioral problem.
(D) Unless Charles is an expert in some branch of psychology, Charles should not offer a solution to Patrick’s behavioral problem.
(E) If Charles is certain of being able to solve Patrick’s behavioral problem, then Charles does not understand why Patrick is behaving in this way.
1. A 原文的结论为问题解决了. 所以削弱题的答案很可能是问题没有解决. 果然A就是. 因为即使表明日期, 可以分清楚已发现will的先后, 但很多情况下还是不知道是不是好有没有找到最新的will. 所以只是partial solution.
2. E 从原文找逻辑关系. 某些花和pollinator是一对一的关系. 还说nector和pollen是only source of food for bees. 所以E中的some...could就对了. 其它答案都不能从原文推出来, 不知道你所谓的混淆答案是哪个.
3. E 还是逻辑关系和充分必要条件. 原文中的逻辑关系有: understand behavior (A)--> an expert (B); certain of soving problem (C)--> no expert (非B). E选项: Charles certain of solving (C) --> not understand behavior (非A) 符合原文逻辑推理: C-->非B-->非A
以下是引用mindfree在2003-4-22 23:57:00的发言： 3. E 还是逻辑关系和充分必要条件. 原文中的逻辑关系有: certain of soving problem (C)--> no expert (非B).
对于这个逻辑关系，我比较困惑。原文：no expert is certain of being able to solve someone else’s problem，我觉得推出的逻辑关系是：no expert-->certain solving problem.上述：certain of soving problem (C)--> no expert (非B).为否命题，不是必然成立吧？
以下是引用lyricling在2003-6-7 14:26:00的发言： siebel，我觉得“no expert is certain of being able to solve someone else’s problem”的条件式应该表示成：expert -->not certain of solving problem ,
感觉上好像没什么问题。不过我常用的方式是这样的： 取：A=~B=No expert 则：原句表达为：A is certain to solve problem. A-->certain (1) 而：引用的下划线句子就是：非A --> 非certain (2) 比较发现，(2)是(1)的否命题。
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发表于 2003-4-22 23:10:00
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