GWD一题

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.    这种worm太多了。，

In evaluating the argument, which of the following would be most useful to establish? 答案选B，我是觉得B的话，如果非转基因的如果不减产，说明这种worm对转基因产生抵抗力，与文中的事实Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.相违背了。怎么回事呢？？？解解解

       A.      Whether corn could be bioengineered to produce the insecticide

B.       Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year

C.      Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them

D.      Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms

E.       Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

对于今年plantings are being seriously damaged by bollworms 题设给出的原因是worm太多了

意思是 bioengineered cotton在抵御worm还是用作用的

我们要找出一个选项回答否定和肯定可以对题设结论产生根本性影响
            可以动摇结论的

B中 回答如果为肯定 那说明转和没转还是有区别的 显然seriously damaged  还是比unusually extensive damage 要好

    回答如果为否定 那说明转和没转没啥区别 那问题就不止是worm多那么简单了 很可能是Bollworms are necessarily developing resistance to the cotton’s insecticide

lz你都已经意识到了B的回答能对整个题设结论产生根本性的影响

这就是evaluate题所需要的答案啊

lz不会是把evaluate题和strength weaken 题混淆了吧