标题: OG一道题不解！！！！ [打印本页] 作者: HelloSusy 时间: 2016-6-8 20:42 标题: OG一道题不解！！！！ Scientists have modified 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 profits.
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 profitable crop
D选项说是否尝试使用genetically modified corn的相比平时使用了更多杀虫剂
解释是：如果多于，那么就加强了观点，如果少于就削弱了观点
可是文中说他们省下来的杀虫剂的钱极少超过他们在新种子上花的钱啊，那么削弱的那一个不就成立不了，不能削弱了吗？ 作者: vivi00 时间: 2016-6-9 09:36
what these farmers saved on insecticide rarely exceeded their extra costs for seed.
说这些farmers之前在杀虫剂上节省的钱没有超过在新种子上的花费，所以如果farmers本可以使用较少的杀虫剂，那就说明使用杀虫剂是可以节省成本的呀
