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Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

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

正确答案: D

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GWD-NT-11 Q4 答案有没有错啊,请NN们指点

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楼主
发表于 2011-5-8 10:00:35 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
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?
A.    Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed.
B.    Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.
C.    Whether for most farms who grow cotton it is their primary crop
D.    Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did.
E.    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B,但我觉得B实在比较cotton和other corps,和原文说的无关啊。我选了E,NN们你们怎么看这道题的?
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沙发
发表于 2011-5-8 10:43:31 | 只看该作者
选B

line of reasoning:
科学家最初目的:培育转基因种子,对抗虫害

现状1:转基因种子每亩杀虫剂用量  略小于  普通种子每亩杀虫剂用量

现状2:转基因种子价格  大于  普通种子价格

现状3:转基因种子产出产品的价值  不大于  普通种子产出产品的价值  

结论:使用转基因种子不比使用普通种子更实惠

argument里只是列出一些收入和支出的事实,根本就没有比较这些收入和支出的大小,怎么知道是收入>支出,还是支出>收入;

现状1:收入
现状2:支出
现状3:因为关系是“不大于”,所以先不管了,就比较上面两项的大小

现状2里面直接给出cost了,要比较的话,现状1也要知道cost,于是选B

E属于废话,农民选择转基因种子的动机和他们后来是不是有收益,没关系的。
板凳
 楼主| 发表于 2011-5-8 11:48:49 | 只看该作者
如果比较的是转基因棉花和普通棉花杀虫剂的价格,我同意有evaluate的效果。但是比较的是普通棉花和其他农作物的杀虫剂价格,与原文结论:是否要使用转基因棉花,感觉不相关啊
地板
发表于 2011-5-8 12:26:07 | 只看该作者
不要管是不是other crops,这里不管crop的事,我们只管农药的种类和价格。

比如,有A B C D E ……很多种农药
普通棉花用A农药
那转基因棉花用什么农药?
如果转基因棉花用A农药,我们比较cost,可以达到evaluate的目的
如果转基因棉花用B C D E其他什么农药(也就是题目中的insecticides typically used on other crops),我们还是比较cost,同样达到evaluate的目的

题目中说insecticides typically used on other crops,没有crops什么事儿,就是想说其他农药
5#
发表于 2011-5-8 12:35:33 | 只看该作者
感觉就DE 还有看头..别的完全不对啊
6#
发表于 2011-5-8 12:42:52 | 只看该作者
DE完全无关。。。
7#
发表于 2011-5-8 12:49:28 | 只看该作者
楼主选E,能给一下推理吗

农民是因为以前用杀虫剂太多了,所以用了转基因种子,能推出什么?

农民是因为其他原因使用了转基因种子,能推出什么?
8#
发表于 2011-5-8 12:50:53 | 只看该作者
这道题BBBBBBBBBBBBBBBBBB

insecticides typically used on other crops=other kinds of insecticides

crop是trick而已。。。。。。。。。。。。。。。。。
9#
 楼主| 发表于 2011-5-8 13:04:39 | 只看该作者
这道题BBBBBBBBBBBBBBBBBB

insecticides typically used on other crops=other kinds of insecticides

crop是trick而已。。。。。。。。。。。。。。。。。
-- by 会员 kikisunflower (2011/5/8 12:50:53)



不要激动,耐我再想想。
10#
发表于 2011-5-8 14:42:03 | 只看该作者
。。。那么激动干嘛 。。。受不了啊。。。。og有一道差不多的啊 B必然错的啊。。。。
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