OG Verbal 紫 14 題目在問什麼?

redable

14．The sustained massive use of pesticides in farming has two effects that are especially pernicious．First，it often kills off the pests’ natural enemies in the area．Second，it often unintentionally gives rise to insecticide resistant pests，since those insects that survive a particular insecticide will be the ones most resistant to it, and they are the ones left to breed．
From the passage above．it can be properly inferred that the effectiveness of the sustained massive use of pesticides can be extended by doing which of the following，assuming that each is a realistic possibility?
(A)  Using only chemically stable insecticides
(B)  eriodically switching the type of insecticide used
(C)  Gradually increasing the quantities of pesticides used
(D)  Leaving a few fields fallow every year
(E)  Breeding higher-yielding varieties of crop plants

Ans is B

請教XDJMs~
雖然做對，但看不太懂文章跟題目確切的意思
煩請幫忙翻譯一下,thanks!

judydongxueni

就是说农药用久了虫子有抗药性了
所以时不时要换一换

vinica

她问题的意思就是说应该采取什么样的方法才能使农药的效率提高.
题中已经说明由于大量的使用农药而使害虫对一种特定的农药具有抗药性,所以此时想要提高农药的efficiency,就应是是经常换农药的种类。

redable

Thanks!

angla

我怎么理解问题说的总是觉得意思很模糊：持续使用大剂量杀虫剂的作用会进一步扩大？。是不是我理解能力太差了？