|
 
- 精华
- 0
- 积分
- 1490
- 经验
- 1490 点
- 威望
- 148 点
- 金钱
- 148 ￥
- 魅力
- 148
|
楼主下次把题目贴出来吧
Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields 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 modified 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 modification 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 modified 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
基因改良的谷物可以减少杀虫剂的使用。但是，改良谷比普通谷种子价格高。虽然改良谷减少杀虫剂的使用费用，但仍不能弥补种子价格高的那部分。作者的结论是用基因改良的谷不能增加profit。
做题关键：
做evaluate题的关键就是看它能不能support或者weaken结论，在这道题里的话，就看哪个选项能对”profit比较“产生影响。你先假设选项成立，然后再取非，看看对结论是不是有相反的影响。
BCE没什么关系，轻松排除
A两种谷物都不能抵御的虫子，同时施加影响，profit不变动
D如果对改良谷多施杀虫剂，那么剪掉那一部分杀虫剂，profit变动，所以结论会就被影响了。选这个 |
|
