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?
Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ report, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically. Which of the following would it be most useful to know in order to evaluate the argument? A. Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed. B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops. C. Whether for most farms who grow cotton it is their primary crop D. Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did. E. Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide. 答案选B,但我觉得B实在比较cotton和other corps,和原文说的无关啊。我选了E,NN们你们怎么看这道题的?
比如,有A B C D E ……很多种农药 普通棉花用A农药 那转基因棉花用什么农药? 如果转基因棉花用A农药,我们比较cost,可以达到evaluate的目的 如果转基因棉花用B C D E其他什么农药(也就是题目中的insecticides typically used on other crops),我们还是比较cost,同样达到evaluate的目的
题目中说insecticides typically used on other crops,没有crops什么事儿,就是想说其他农药