[求助]GWD-10-40

nanalin

Q40:
Insect infestations in certain cotton-growing regions of the world have caused dramatic increases in the price of cotton on the world market.  By contrast, the price of soybeans  has long remained stable. Knowing that cotton plants mature quickly, many soybean  growers in Ortovia plan to cease growing soybeans and begin raising cotton instead, thereby taking advantage of the high price of cotton to increase their income significantly, at least over the next several years.

Which of the following, if true, most seriously weakens the plan’s chances for success?

A. The cost of raising soybeans has increased significantly over the past several years and is expected to continue to climb.

B.   Tests of a newly developed, inexpensive pesticide have shown it to be both environmentally safe and effective against the insects that have infested cotton crops.

C.   In the past several years, there has been no sharp increase in the demand for cotton and for goods made out of cotton.

D. Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying.

E.   The species of insect that has infested cotton plants has never been known to attack soybean plants.

求助,这题我选C, 答案是B

题目问: 削弱计画
假如如C说的,过去几年,棉花及棉花产品的需求没有大幅增加..这样不就说明了,改种棉花这个计画不好吗?

请指正我的思考错误,先谢谢了

leeon

原文中说了Insect infestations in certain cotton-growing regions of the world have caused dramatic increases in the price of cotton on the world market这是原文的一个evidence，所以不论过去几年需求量有没有上升，都不会影响棉花价格的上涨。所以不能削弱。

B说a newly developed, inexpensive pesticide 可以effective against the insects that have infested cotton crops，削弱了原文的evidence，从而削弱原文的结论。

nanalin

谢谢你啊!

我真糊涂,题目看到後面忘了前面第一句说的是昆虫横行"棉花园",棉花价格增长... 所以,B选项说新发明的杀虫药对杀棉花田的昆虫有效.... 就代表新农药出来了,昆虫不横行,自然削弱题目了.... 应该是这样吧,但愿我没想错

leeon

原文的line of reasoning：Insect infestations in certain cotton-growing regions of the world －－caused dramatic increases in the price of cotton on the world market－－the price of soybeans  has long remained stable=>cease growing soybeans and begin raising cotton instead, thereby taking advantage of the high price of cotton to increase their income significantly.

这样看的话就可以看出棉花价格增长是种棉花增加他们收入的前提。而棉花价格增长又是由Insect infestations 造成的。所以B说有效杀灭害虫的杀虫剂开发出来了，也就是导致棉花价格增长的因素不存在了，自然也就是原文的前提不再成立了。

nanalin

谢谢你清楚的解释呀!

我也想学孤独九剑耶~~ 最喜欢令狐冲了

leeon

呵呵！

多多分析，多多讨论，大家共同提高。

rings

请问D怎么不对,谢谢

leeon

No one would be willing to pay more than they are now paying.But it does not mean they would not buy. So choice D is incorrect.

mikeleven

D才对

因为文章的结论是显著的高价会提高农人的收入，就算B成立，并不能代表价格一定不提高，因为损失已经造成，至于损害控制(杀虫剂)的效益有多大并不知道，所以价格仍有可能显著提高。例如原来300元，虫害-->涨到3000元，损害控制-->只涨到1000元------>>仍然很好赚>>B无法削弱~!!!!

D说明了管你从300涨到3000还是30000000，没人愿意花超过300来买，(那最后价钱一定会跌回300)，就完完全全削弱了结论~!!

[此贴子已经被作者于2004-10-22 17:00:48编辑过]

lawyer_1

同意B

D错在：目前的COTTON价格已经能让棉农能增加他们的收入，目标已能达到。D表达的是人们不愿付比现在高的价格，对目前的价格并不排斥。所以棉农增加收入的目标还是能达到。WEAKEN不了结论。