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标题: TTGWD1-40 [打印本页]

作者: yinhang_1217 时间: 2009-9-2 10:26
标题: TTGWD1-40

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?

The cost of raising soybeans has increased significantly over the past several years and is expected to continue to climb.
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.
In the past several years, there has been no sharp increase in the demand for cotton and for goods made out of cotton.
Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying.
The species of insect that has infested cotton plants has never been known to attack soybean plants.

答案选B

我选的是D，理由是如果没人买，怎么会有高收入。但是B实在感觉没有看出来啊。

作者: 大胖 时间: 2009-9-2 12:04
D说比现在的价格更高的价格才会导致没人买。其实是和题目无关的选项。说的是消费者对价格偏好的问题

作者: prayer 时间: 2009-9-2 13:37

这道题的答案很巧妙。

题目说，由于虫害，cotton的价格高，所以以后改种cotton来获取高收益。weaken。收益=价格×产量，产量少了，价格才高了，如果产量高了，价格可能就跌了，所以收益就不一定增加。

B说便宜的杀虫剂环保高效，那就是在低成本的基础上提高了产量，那么价格就要下跌了，所以收益不一定会增加，weaken。

D的higher prices 没有提到过，文中只是提到现在high的价格，现在是供小于求，所以不用担心消费者买不买的问题

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