Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ reports, 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?
key 是D 想不明白,帮忙解释一下,谢谢!
涉及一个统计准确性的问题吧。如果尝试了改良种子的农民就用一亩地试,而用普通种子的有一万亩地,那么会直接影响到对这个报告的评估。
LZ看一下这个题的讨论吧,我倾向选B
http://forum.chasedream.com/dispbbs.asp?BoardID=24&ID=83238
欢迎光临 ChaseDream (https://forum.chasedream.com/) | Powered by Discuz! X3.3 |