kui-cr-2 出处未知

likui

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 seriously damaged by bollworms. Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide. Bollworms breeds 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 it be most useful to establish?

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 insecticide that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton.

答案我也不知道，大家讨论讨论。

howardwang

我觉得应该是d.

life_9

e?

ethyl

同意D

sensornet

我选B。如果其他cotton也受灾了，就不能说明corn-bred bollworms是那个bioengineered cotton受灾的原因。如果，其他的没受灾，则可以说明。

D好像不能说明问题，文中讨论的是bioengineered cotton在一段时间内收不受灾的区别，得出结论So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms。所以，别的虫子也吃好象不能evaluate。

likui

为什么选D呢，说说原因。

我觉得这种cotten专门被生物工程成了against BW的，为什么选other than BW的呢，这样不是无关选项了吗。

[此贴子已经被作者于2005-8-10 7:26:40编辑过]

howardwang

结论说the cotton is simply being overwhelmed by corn-bred bollworms.

很关键的一个词是simply。即结论是corn-bred bollworms是毁坏cotton的仅有的原因。

而d说，除了bollworms外，是否有别的害虫常常毁坏cotton。如果你回答是，则可能是因为今年别的害虫多了，所以毁了cotton，进而削弱结论；如果你回答不是，则排除了一个造成cotton毁坏其他原因，进而支持结论。

所以，我认为d是答案。

likui

明白了，谢谢howardwang

观察真是细致，看出了simply，我一直纠缠在为什么这种东西今年就不行了上面。

我问了，答案确实是D

Colin33

明显是D

icerach

不知道这道题目是哪里的，答案保证是D么？

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 seriously damaged by bollworms. Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide. Bollworms breeds 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.

对D有质疑，蓝色部分应该是提出的premise吧，我们要评价的是整个推导过程，即根据premise:1，生化工程为抵抗BW，2，以前未受灾，3，今年受BW大灾，4，BW不一定会对insecticide产生抗体，5，以前种棉花多，conclusion:今年可能仅仅（simply）是由于棉花少，BW多，所以受不住（overwhelmed）了。如果是evaluate的话，就应该质疑premise到conclusion的过程，所以是B，D是在推敲premise是否正确，方向偏了

Open to discussion

[此贴子已经被作者于2005-8-11 0:11:18编辑过]