以下是引用mrsyue在2004-11-10 4:56:00的发言：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.
答案B, 我选C.
If cotton demand is unlikely to increase sharply, yet there comes a sharp rise in the number of cotton growers (i.e. cotton supply), it is likely that the price of cotton will drop, weakening the argument.
In B however, the new pesticide is only likely to enhance the growers' success because it helps them against cotton insects. It half supports the argument.
大家怎么想呢？ 需求量可能一直都没有增加， 但是由于病虫害， 价格上升。所以种豆农可能转行。 转行短期也可能发财。 只有b， 一旦杀虫剂管用， 立竿见影， 削弱结论 ， 就是他了 | 
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发表于 2005-9-15 22:21:00
