Among people who experience migraine headaches, some experience what doctors call "common" migraines, whereas others experience "classical" migraines.Siblings and spouses of common migraine sufferers are themselves twice as likely as the general population to experience common migraines.Siblings of classical migraine sufferers are four times more likely than the general population to experience classical migraines, whereas spouses of classical migraine sufferers are no more likely than the general population to experience such headaches. 文章翻一下：有偏头疼的人中有两种，一种常规的，一种典型的，常规患者的兄妹和配偶是常人两倍的可能性患偏头疼，而典型患者的姐妹是常人的五倍（four times more），不过配偶跟常人差不多的患病率。
The information above provides the most support for which of the following hypotheses? 题目问题哪一个能根据文章推出来
(A) Susceptibility to classical migraines is more dependent on hereditary factors than is susceptibility to common migraines. 文章中说classical的兄妹五倍患病率，配偶却没影响，而common的兄妹和配偶都是两倍的患病率，很显然classical跟亲戚关系更有关咯
(E) Between one-quarter and one-half of the general population suffer from either common or classical migraine headaches.文章自始至终都只提了患病率的相互关系，连患病率多少都没提，甚至都没提患偏头疼的人所占正常人口的比率，E错
Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds. In Britain, partridge populations have been steadily decreasing since herbicide use became widespread. Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides. However, tests show no more than trace quantities of herbicides in partridges on herbicide-treated land. Therefore, something other than herbicide use must be responsible for the population decrease.
文章说：除草剂提高谷物作物的生长效率。然后P鸟呢在除草剂广泛使用后就一直在减少，一些人就认为了除草剂对P鸟有害。然后试验测不到P鸟身上有任何除草剂的量，所以就认为其他原因导致P鸟减少。
Which of the following, if true about Britain, most seriously weakens the argument?
(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet.
他因攻击文章，说杀虫剂杀死了P鸟主要吃的虫子，典型正确选项
(E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them.
说除草剂中的毒很容易在吃了这些毒的动物组织上识别出来，这不是削弱，是加强原文哦，原文说在P鸟身上查不到，然后E又说很容易查到，不就说明了确实没有么（LZ的思路可能是说E既然说了很容易查到，那不就是说文章查不到是错的么。注意，E的明确说法是说在吃了除草剂的动物组织上很容易差别出来，意思就是告诉你文章所说的P鸟身上查不到除草剂的真实度是大的）
Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds. In Britain, partridge populations have been steadily decreasing since herbicide use became widespread. Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides. However, tests show no more than trace quantities of herbicides in partridges on herbicide-treated land. Therefore, something other than herbicide use must be responsible for the population decrease.文章说：除草剂提高谷物作物的生长效率。然后P鸟呢在除草剂广泛使用后就一直在减少，一些人就认为了除草剂对P鸟有害。然后试验测不到P鸟身上有任何除草剂的量，所以就认为其他原因导致P鸟减少。
Which of the following, if true about Britain, most seriously weakens the argument?(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet.他因攻击文章，说杀虫剂杀死了P鸟主要吃的虫子，典型正确选项
(E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them.说除草剂中的毒很容易在吃了这些毒的动物组织上识别出来，这不是削弱，是加强原文哦，原文说在P鸟身上查不到，然后E又说很容易查到，不就说明了确实没有么（LZ的思路可能是说E既然说了很容易查到，那不就是说文章查不到是错的么。注意，E的明确说法是说在吃了除草剂的动物组织上很容易差别出来，意思就是告诉你文章所说的P鸟身上查不到除草剂的真实度是大的）
PS: LZ下次记得把题目打出来哦
-- by 会员 AaronYao (2011/10/11 22:10:00)
明白了 解释的非常清楚 谢谢啊 嘿嘿 | 
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发表于 2011-10-11 21:20:20
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