课程咨询
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE阅读题目解析:庄稼受害虫损害

2017-06-19 09:53:00来源:网络

  P3

  1

  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.

  在过去的 40 年中,不但农业杀虫剂的使用数量显著增加,而且农民也用的更谨慎更精确。

  2

  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.

  尽管如此,同期内因特定种类的害虫损失的庄稼的比例也上升了,甚至相关害虫并未发展出针对现有杀虫剂的抗性。

  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.

  选 B

  问我们,哪一项能够完美解释,杀虫剂使用技术发展的同时,损失的也增大了。

  A 有些有危险又相对没效果的 40 年前常见的杀虫剂,现在不用了。划掉。

  B 随着杀虫剂越来越专业化,很多情况下买杀虫剂控制某种害虫所需的花费,已经超过了这些害虫可能带来的最大损失。越来越好用,但成本提高了,以至于农民算算账,决定硬扛算了。合理。

  C 前半句没问题,后半句不知在说什么:现在的农民比 40 年前更仔细地观察自己的地。???什么嘛。

  D 现在农民杀虫不用化学杀虫剂了,新方法和杀虫剂效果差不多。但这不能解释为什么现在损失更大了。划掉。

  E 以前人们不了解杀虫剂对人和哺乳动物的危害,现在知道了。干扰项。它似乎暗示,因为已经了解到杀虫剂的危害,所以用的少了,以至于损失变大了。但文段告诉我们,现在用的比以前多,a great increase not only in the number of agricultural pesticides in use but also …

’  以上就是新东方在线GER频道为你带来的GRE阅读题目解析:庄稼受害虫损害,更多精彩敬请关注新东方在线GRE频道。

本文关键字: GRE阅读 GRE阅读真题

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
GRE录播课(全科班/单项班) GMAT6-8人直播VIP小班 托福直播精讲班(30天/60天)
更多>>
更多惊喜>>
更多>>
更多资料