TN版GWD11套Q3

linya76

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.
答案是B，但我觉得似乎D也有道理。因为new seeds的amount of insecticide slightly lower,所以如果种的地足够多的话，也可以省钱，有经济价值啊。
请牛牛们解答，谢谢

bogere

又看了另一个讨论帖，突然发现我把E选项的意思理解错了。
E选项只是说大部分选用了新种子的棉农是否是因为过去他们过去需要使用大量杀虫剂而选择了新种子
题目中已说了新种子每亩要用的杀虫剂量只比普通棉花需要的量略小，因此无论之前要用的量大小与否，都不会对新旧种子的cost差造成足够的影响

B的话，是说普通棉花用的杀虫剂比其它作物都高，这样的话如果普通棉花和新种子各自所用的杀虫剂价格差足够大，还是会对新种子是否比过去省钱造成可观影响的。

不知道这样理解对不对了。

bogere

这道题我怎么觉得反而应该是E呢？
题干中的结论是modified seed不能为棉农带来更高的经济利益，原因是cost高revenue又上不去。

题目中一直比较的是modified seed和ordinary cotton, 跟其它作物无关啊。
所有的选项都不是从revenue而是从cost方面来解释，只有E－棉农可能使用了大量的不必要的杀虫剂－可以undermine题干中的结论

Thruth

B 和其它作物比较没有任何意义，明显不对。
E

http://forum.chasedream.com/GMAT_CR/thread-328509-1-1.html?SearchText=gwd11 3

13711

个人认为是B，补出了杀虫剂与经济利益之间的桥梁，即杀虫剂的价格

记忆钢琴

http://forum.chasedream.com/GMAT_CR/thread-328509-1-1.html?SearchText=gwd11 3

看过这个帖子明白一点了

记忆钢琴

求NN解答。。。我凭直觉选的E。。在考场上遇到这种题估计我就是靠直觉蒙了。。

记忆钢琴

顶，为什么B要比较其他作物呢？

ken178

这题答案是什么？怎么网上又有B又有E选项。晕

ken178

还有其它的解释吗？我的想法和LZ的想法一样，不明白为什么评价这个genetic modifications to cotton 要和其它的作物比较？？？？？？