一道evaluate的题

Scientists have made genetic modifications to cotton to increase its resistance to insect pests.  According to farmers’ report, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not.  Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically.

Which of the following would it be most useful to know in order to evaluate the argument?

1. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed
2. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops
3. Whether for most farmers who grow cotton it is their primary crop
4. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did
5. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide

答案选D,可是这题比较单位成本就可以了，为什么还要比较种植面积呢？我选的是B，但是也觉得B的比较对象有点问题，不知道D选项应该如何解释？

这题我用相关不相关选D，虽然单位成本相差不多，但是如果种植面积相差很多的话，那总成本也就会相差很多，而这正是农民们关心的问题。

而b中，这个评价和other crops没啥关系吧。。。

我选Ｅ　

e的意思是：是否那些试用过改良种子的农民之所以试用是因为之前不得不用大量杀虫剂

对评价这个argument好像不起什么作用。。。

怎么没人讨论啊？

整段话是采用与不采用的对比，对比的目的就是给农民提供采用modified seed还是不采用的依据，所以答案必须是与此接近的

1. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did

所以应该选D

1. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did

所以应该选D

结论是 switching to the modified seed would be unlikely to benefit most cotton farmers economically.

注意：评价题对问题的回答是与否将分别对结论起支持或者削弱作用

原题目条件是单位面积所用insecticide其中genetic modifications 与用其他几乎差异不大，成本也相差不大，那就是杀虫效果的好坏，试想如果，在这种情况下，农民大面积选择genetic modifications 这个东东，就肯定说明这玩意的杀虫效果好，那么就对结论起反对作用，反之则对结论起支持作用

什么叫相关不相关方法？

我也选E了。看了大家的解释，还是想不通为什么选D...

问题是：Which of the following would it be most useful to know in order to evaluate the argument?

只是要evaluate the argument，难道一定要支持结论么？我选E，得出结果原文的结论是错误的，为什么不可以？

头晕：（

楼上是如何用E得出原文结论错误呢?

题干前提: 普通棉花种子平均每亩所用杀虫剂只比改良棉花种子平均每亩所用杀虫剂少一点点(即平均成本低一点点)

题干结论: 既然改良种子贵,而且又没有高产出,所以用改良种子不可能使棉农经济上受益

"e的意思是：是否那些试用过改良种子的农民之所以试用是因为之前不得不用大量杀虫剂"

如果:那些试用过改良种子的农民之所以试用是因为之前(不得不)用大量杀虫剂 ------能对原文结论起作用么? 是削弱了还是增强了?

如果:那些试用过改良种子的农民之所以试用不是因为之前(不得不)用大量杀虫剂 --------能对原文结论起作用么?是削弱了还是增强了?

这题以前很多高手都讨论过

大家可以搜索一下相关题号

此题争议在B和E