GWD23-14

yaomao

    

40. GWD-23-Q14

    

Plantings of
cotton bioengineered to produce its own insecticide against bollworms, a major
cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously
damaged by bollworms.  Bollworms,
however, are not necessarily developing resistance to the cotton’s
insecticide.  Bollworms breed on corn,
and last year more corn than usual was planted throughout cotton-growing
regions.  So it is likely that the cotton
is simply being overwhelmed by corn-bred bollworms.

    

 

    

In evaluating the
argument, which of the following would be most useful to establish?

    

 

    

1. Whether corn could be bioengineered to
        produce the insecticide
2. Whether plantings of cotton that does
        not produce the insecticide are suffering unusually extensive damage from
        bollworms this year
3. Whether other crops that have been
        bioengineered to produce their own insecticide successfully resist the
        pests against which the insecticide was to protect them
4. Whether plantings of bioengineered
        cotton are frequently damaged by insect pests other than bollworms
5. Whether there are insecticides that
        can be used against bollworms that have developed resistance to the
        insecticide produced by the bioengineered cotton

    

    

大家帮忙看看分析下啊，我已经昏了，看不出个所以然来，只是觉得B相关

期待蔚蓝

引用一个牛人的解释：

这题说， 棉花有抵制那个虫子的anti
但是还是受害了，因为玉米是虫子变得很多
这样的话，也就是说有两个结论
玉米是棉花受害，棉花本身的anti有用
B说的是，如果棉花没有anti的话，虫子会不会对他造成极大伤害
这样，如果是， 说明anti有用， 如果不是，说明anti没用 于是， 按照原文的意思就是， 如果是，原文成立， 如果不是，原文不成立

这个题的中心是棉花的anti是自己没用呢？还是被corn给盖过了
所以要evaluate他，就要看那些没有anti的棉花是不是遭受了更大的伤害

[此贴子已经被作者于2006-10-27 22:05:22编辑过]

mymengming

可以肯定C是正确的
B的缺点：如果正常棉花没有被吃，这个就是很荒谬的，啥也不能解释，倒是可以解释成转基因的棉花的insectcide倒是成了美味了，荒谬吧，但是C说的通，回答yes，则说明虫子太多了，产生的药虽然能杀虫子，但是每个虫子宁可被杀死也要吃；回答no，说明棉花的own药不管用了

yedeanboy

又发现一个问题，B选项中也没有说那些没有insectcide的cotton种植的地方是否今年也种过大量的corn，如果没有的话就更没可比性了。
这题漏洞太多了，很怀疑题目错误

yedeanboy

这道题目我还是不太能理解，尽管说B看起来比较象答案，但仔细看看，似乎不对啊！
题干说的是：有一种经过生物工程改良的cotton自身带有insecticide,能够预防bollworms，一直以来都有效果，但今年似乎突然失效了。有种观点认为这不一定是bollworm产生了抗药性的结果，因为今年在种植cotton以前，这地上种了比往年更多的corn，而corn是bollworm滋生的温床。
问题是下列哪项能够对评价这个观点提供帮助？
B选项说得是去看看那些没有insecticide的cotton今年有没有受到特别大的损失。
让人费解的问题在于无论B选项的答案是Yes或者No，似乎都没有任何说服力阿？
比如没有insecticide的cotton今年受到了特别大的损失，so what? 那些有insecticide的cotton也受到了特别大的损失，而从题干和B选项中无法知道哪种cotton的损失更大，只知道两个都很大，所以无法排除是否有抗药性的说法，请大家仔细想想？
而如果没有insecticide的cotton今年没有受到了特别大的损失，那就更加好笑了，听起来似乎有insecticide的cotton中的insecticide反而产生了副作用，帮助bollworms繁殖了？！

个人觉得B选项比较可取的改法是，改成看一下那些没有insecticide的cotton今年的损失是否比那些有insecticide的cotton的损失更大，如果是，则说明虫子没有产生抗药性，如果不是，则说明虫子已经产生抗药性了。

yogaII

Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously damaged by bollworms.  Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.  So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.

本题要evaluate这个claim对不对。

In evaluating the argument, which of the following would be most useful to establish?

1. Whether corn (无关)could be bioengineered to produce the insecticide
           
2. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
           
3. Whether other crops （无关） that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them
           
4. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than （无关） bollworms
           
5. Whether there are insecticides that can be used against bollworms（无关）that have developed resistance to the insecticide produced by the bioengineered cotton

B说 看看那些非基因工程的棉花是不是受到了超多的虫害。

YES －》 看来那个玉米影响比较大

NO  －》 看来是虫子已经进化了抗药性了

yaomao

谢谢楼上解释

fpig

这题感觉怪怪的，说说我的理解：

因为题干已说了This year the plantings are being seriously damaged by bollworms，所以

So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.这个argument的重点是by corn-bred bollworms。题干说虫子不一定进化了抗药性，只知道在棉花种植区种了更多的玉米，这样导致更多的虫子（虫子以玉米为生），引起 cotton being overwhelmed ，所以要评价这个，就看B，如果答案是，则是by corn-bred bollworms；如果答案不是，则不是by corn-bred bollworms。

不过这样似乎有其它类型的bollworms了，文中却没有给出这方面的信息。

So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.这个argument的重点是by corn-bred bollworms。题干说虫子不一定进化了抗药性，只知道在棉花种植区种了更多的玉米，这样导致更多的虫子（虫子以玉米为生），引起 cotton being overwhelmed ，所以要评价这个，就看B，如果答案是，则是by corn-bred bollworms；如果答案不是，则不是by corn-bred bollworms。

不过这样似乎有其它类型的bollworms了，文中却没有给出这方面的信息。

[此贴子已经被作者于2006-12-1 23:22:52编辑过]

lb1900

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