15题这个貌似原题的变体 一种cotton 在last year可以生产nature pesticide 于是some farmers建议都改良成这种cotton 但是去年仍有部分cotton使用以往一半的人工pesticide 而产量也下降了（？）不太确定这里）所以不建议都改良 考古 待确认 V1 有一个说种棉花，可使用农药太多。后来说有个新品种不用农药，但是发现去年种了新品种的还使用了一半量的农药，所以说今年再推广新品种也没用。问加强。 ANS: 我选了一个有种虫子不怕农药，而且今年会很流行...不知对不对。 我见到的原题，忘记在哪了，希望对大家有帮助： 说一种改良后的基因玉米能够产生pesticide，起到杀虫的作用，然后农民就改种基因玉米，在种的过程中只用了少量的pesticide，但是产量跟普通玉米差不多。另外，普通玉米的种子价格要比基因玉米的种子价格低很多，所以，种基因玉米不划算，明年不种了。问WEAKEN：原题答案：说中基因玉米的过程中，使用的pesticide的量超出了实际使用量(造成了cost的浪费。)，而这一部分大于种子费用的差额。 -- by 会员 wakjzmb (2010/8/3 13:18:25)
谢谢，你说的应该是这题，我去跟寂静主人确认一下
T-3-Q3.
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.
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发表于 2010-8-2 17:16:42
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