标题: 求教og12 逻辑69. 这个出题目的是不是有病啊，求大家围观··· [打印本页] 作者: gzguohongbo 时间: 2011-10-21 18:53 标题: 求教og12 逻辑69. 这个出题目的是不是有病啊，求大家围观··· Scientists have modifi ed feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modifi ed corn last season applied less insecticide to their corn fi elds and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modifi ed seed would be unlikely to increase profi ts. Which of the following would it be most useful to know in order to evaluate the argument? (A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modifi cation are equally ineffective (B) Whether the price that farmers receive for feed corn has remained steady over the past few years (C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops (D) Whether most of the farmers who tried the genetically modifi ed corn last season applied more insecticide than was actually necessary (E) Whether, for most farmers who plant feed corn, it is their most profi table crop
作者杂文中明明说了节约杀虫剂的钱无法弥补买种子的钱，为什么还选D 我不知道是我疯了还是ETS傻了作者: sdcar2010 时间: 2011-10-22 00:17
Because you missed the modifiers: rarelly, necessary.
It is possible that most farmers used MORE pesticides than NECESSARY when using the new seeds. If they reduce the amount of pesticides, the cost saving would more than compensate the extra cost when buying the new seeds.作者: gzguohongbo 时间: 2011-10-23 10:12
谢谢啊，看来我当时是疯了，但是ETS也会在这种问题上纠结？作者: 24lam 时间: 2011-10-23 16:28
哎，今天这道题，我也做错了。。。作者: EMMALIULIU 时间: 2011-12-4 19:47
我后来反复阅读几个选项，发现A B C E都只讲feed corn，而原文是要比较两种feed corn（ordinary corn和genetically modified corn），如果讲的是两种corn的共性，那肯定错误啦。所以一下子都排除掉，选D！作者: teddybearj4 时间: 2012-4-5 20:03
其他几个错误选项其实都还蛮好排除的，但是正确选项真的好难一下子读懂并且反应过来。 唉……Sdcar大神的境界要怎样才能达到啊~
