一道短阅读问题求解~

WWOWUID: 3649627

Over the last 40 years there has been a great increase not only in the number of agricultural pesticides in use but also in the care and sophistication with which they are used by farmers. Nevertheless, the proportion of agricultural crops lost to certain pests worldwide has increased over the same period, even when the pests concerned have not developed resistance to existing pesticides.

7. Which of the following, if true. best explains how improvements in pesticide use have been accompanied by greater losses to certain pests?
(A) Some dangerous but relatively ineffective pesticides common 40 years ago are no longer in widespread use.
(B) As pesticides have become increasingly pest- specific, controlling certain pests with pesticides has turned out to cost more in many cases than the value of crop losses caused by those pests.
(C) Because today's pesticides typically have more specific application conditions than did pesticides in use 40 years ago, today's farmers observe their fields more closely than did farmers 40 years ago.
(D) Certain pest-control methods that some farmers use today do not involve the use of chemical pesticides but are just as effective in eliminating insect pests as those that do.
(E) Forty years ago, much less was known about the effects of pesticides on humans and other mammalian species than is now known.

这道题答案是B，我选了C。原文中只是说 agricultural crops lost 就是农作物量损失，貌似并没有提到经济问题，但B选项说花费高了。C选项能不能这么理解：因为今天的农民更仔细观察农作物，所以发现了一些损失是由害虫导致的，而以前并没有把损失归到害虫身上。 求指点~~ 感激不尽

岳然UID: 3654715

非常讨厌新G的这种题目。说说我的理解，不一定对：
文章说的是the proportion of agricultural crops lost to certain pests worldwide has increased
仔细读，说的是农作物由于某些特定的害虫而损失的比例增加了，并且是在全世界范围内。
按照你的理解，农民仔细检查以后的确有可能发现农作物是由于害虫损失的，但并不能解释为什么这些增加的损失都来自于这些特定的害虫。所以C不对。
至于B为什么对，文章中的确没有提到经济损失，但是如果使用某些杀虫剂会支出更多的钱，农民很可能就不会用这种这些杀虫剂了，因此导致了文中所说的情况。

辰南UID: 3613235

岳然 发表于 2015-9-17 21:31
非常讨厌新G的这种题目。说说我的理解，不一定对：
文章说的是the proportion of agricultural crops lost ...

你对C的解释有点诡异，建议带回原文，看看你这种推测有没有依据
原文里已经说了 pesticide数量增多，care 与sophistication也增多  可以推测特定pesticide的花费大增，导致花费远大于损失的crop，所以农场主不一定用，所以crop损失增大

个人意见。

WWOWUID: 3649627

岳然 发表于 2015-9-17 21:31
非常讨厌新G的这种题目。说说我的理解，不一定对：
文章说的是the proportion of agricultural crops lost ...

恩恩清楚了！多谢！:handshake

WWOWUID: 3649627

辰南 发表于 2015-9-17 21:42
你对C的解释有点诡异，建议带回原文，看看你这种推测有没有依据
原文里已经说了 pesticide ...

我也觉得我的C解释有点牵强，现在明白了，因为农民使用情况也变得复杂。谢谢了！

gterlannUID: 3595027

你对C的理解的错误在于，原文的propotion指的就是gross loss to certain pests,并没有说the crop loss attibuted to these pests.二来，你这样的推理是超出GRE逻辑程度的，GRE的逻辑不会跨度这么大。
B我也觉得不好，不过相对来说，比其他四个能凑合一点

WWOWUID: 3649627

gterlann 发表于 2015-9-18 00:03
你对C的理解的错误在于，原文的propotion指的就是gross loss to certain pests,并没有说the crop loss atti ...

gross loss to certain pests和the crop loss attibuted to these pests有什么区别呢

MagdalenUID: 3875784

马一下