t3 q3

lixuemei · 发表于 2010-1-8 12:35:42

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.

这道题答案是哪个，我看了以前的帖子，好像有选B,D,E都有。还有请大家说一下这个题的解题思路可以吗

prayer · 发表于 2010-1-8 12:44:52

想都不要想，答案肯定是D。
题目里说的是benefit most cotton farmers economically.
而文章中只说到了cost，a比b多，但是没提a的产量跟b的谁的多。
收益=产量×cost。所以一定要evaluate那个产量。也就是D

bfantasy56 · 发表于 2010-6-30 10:52:11

答案明明是B啊

t3 q3

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