GWD-6-21正确选项如何理解

homosexual

以下是引用lip00ff2002在2004-7-4 23:58:00的发言：

One fact: scientists are making genetic modifications to increase resistance

cause 1: the amount of insecticide was lower for those geneticly modified seed than those original

cause 2: the modifiied seeds cost more and don't have higher market value

Effect: the modified seed isn't beneficial for cotton farmers economically.

If we change the evaluating sentence, we could regard it as an assumption for this reasoning: the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed. If we say yes, the reasoing is accetable. If we say no, the reasoning is undermined for the results from the farmers' report is irrelevant.

GOOD POINT

mariezhu

偶觉得b还是挺可以理解的

要evaluate的结论是switching to the modified seed would unlikely to benefit most cotton farmers economically.

B指出用在棉花上的农药价格特别高,所以即使用量少了一点儿,农民也可以因为省了钱而选择抗虫能力较高的种子

而对E的回答似乎和结论switching to the modified seed is unlikely to benefit most cotton farmers economically不太有关系.

请大家继续讨论...

trustme

看了大家的讨论,我想了想,也是觉得E好了!  但总不是太完美...

mariezhu

这题偶还有疑问,顶一下

叮当

I think E too.

B compares insecticides for cotton with that for other crops, so the comparision is out of the scope.

E says that people who use modified seeds have some special reasons for their decision, so "switching to the modified seed probably benefit those cotton farmers economically".

[此贴子已经被作者于2004-7-9 11:53:35编辑过]

青鸟

这个明明不是gwd6阿

fair_sword

B:绝对不对，怎么可以和其他东西比on other crops。

A,B 两个测试对比，评价测试是否有效，看A,B两个测试的条件是否一致。如果原文中划线部分没有，D就对。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.

本来没有看E，现在看来E对的。

lost_my_account

我觉得是E，那些人不得不用大量杀虫剂的原因，是因为虫子特别多，是不是，这应该属于常识。所以能抗病虫害的种子已经很不错了，面对比别人更多的虫子，他只需同样多的杀虫剂辅助就可以。所以我选E。

B虽然谈到经济效益，但是ordinary和other crops比较是没有意义的。我们要比较的是ordinary和insect resistance的经济效益的比较

GreenHorse

这肯定是E啊，第一页都把我看傻了。

有那么个例子，好像说两个地区比较防洪效果之类的，一个地区不好。但原因是气候不同。另一个地区前10年都没下过雨。是不是？

[此贴子已经被作者于2004-7-18 2:05:08编辑过]

robertchu

Agree that E is the best among the given choices.