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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? 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. D. Few consumers would be willing to pay significantly higher prices for cotton goods than they are now paying. 本来没做到那么后的GWD，看见大家讨论的热情高涨，我也来参与一下（我没太多挣扎就选了B，洋洋，你把B和D手误输反了吧？）： 宝儿，你在那边帖子讲的“现在的价格”我理解是“虫害正在发生的现在的价格”，原文的过去完成时就是从之前某个时间发生并持续到现在的呀。 简化原文信息之后基本上种豆的内容可以忽略，逻辑链：【因：虫害；果：棉花价格上升；结论：人们跑去种棉花】 （B）虫害受控，切断因，则棉花价格上升的果就被破坏【是逻辑削弱题型的一种典型——切断因果】 （如果从供求关系来看，多了人去种棉花+而原来种棉花的因为没有虫害=＝＝》产量暴增＝＝＝》价格暴跌） （D）貌似有供无求＝＝＝》新棉农就亏大了，但是忘记了原文讲到“多了很多人去种棉花”，但是因为虫害嘛，所以产量不会暴增，但是总会稍微比少人种的情形增加一些，因此价格不会继续上涨，反而会适当下调，这样人们不会面对过高的价格，“有供无求”的局面不太有坚强立场
[此贴子已经被作者于2007-10-9 22:11:43编辑过] | 
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发表于 2007-10-9 16:48:00
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