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标题: OG 10-147 求指导！ [打印本页]

作者: 很旅行地爱情 时间: 2011-10-3 23:36
标题: OG 10-147 求指导！

147. Crops can be traded on the futures market before they are harvested. If a poor corn harvest is predicted, prices of corn futures rise; if a bountiful corn harvest is predicted, prices of corn futures fall. This morning meteorologists are predicting much-needed rain for the corn-growing region starting tomorrow. Therefore, since adequate moisture is essential for the current crop’s survival, prices of corn futures will fall sharply today.

Which of the following, if true, most weakens the argument above?

(A) Corn that does not receive adequate moisture during its critical pollination stage will not produce a bountiful harvest.

(B) Futures prices for corn have been fluctuating more dramatically this season than last season.

(D) Agriculture experts announced today that a disease that has devastated some of the corn crop will spread widely before the end of the growing season.D

(E) Most people who trade in corn futures rarely take physical possession of the corn they trade.

想问一下为什么A不对呀？我的思路是，题干中说 adequate moisture is essential for the current crop’s survival，由此可以推理的是current crop可以survive，但由于A中提供的信息得知授粉期如果得不到充分雨水也不会大丰收，所以推理出current crop可以survive但不会produce a bountiful harvest，所以原文的结论也不成立。对D的想法是因为它提到的是devastated SOME of the corn crop，这个some不是应该是很不充分的错误关键词吗，为什么会选D。。

作者: sdcar2010 时间: 2011-10-4 11:10
A is not the best answer because we do not know if the pollination stage has passed or not before the much-needed rain. If not, A is not weakener.

作者: 很旅行地爱情 时间: 2011-10-4 11:15
谢谢大侠指点！^^那D里面的那个some应该怎么理解呢？some不是也不一定指全部corn crop都会被破坏吗？还是有点不懂D。。望指导！：）

作者: sdcar2010 时间: 2011-10-4 11:16
For D, there is also another keyword: spread!

作者: 很旅行地爱情 时间: 2011-10-4 11:22
是可以从spread推出后果会很严重吗？。。谢谢！！

作者: sdcar2010 时间: 2011-10-4 11:24
And widely!

作者: 很旅行地爱情 时间: 2011-10-4 11:26
哦好的，谢谢牛牛！：）

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