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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?


  • 分析A选项 分析选校图标
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  • 分析B选项 分析选校图标
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  • 分析C选项 分析选校图标
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  • 分析D选项 分析选校图标
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  • 分析E选项 分析选校图标
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该题平均耗时:4m38s ,平均正确率:36.9%。 该题由网友ia6Pv6DE提供。更多GMAT题目请

网友解析

当前版本由 百香果蜂蜜茶 更新于2016-01-18 11:49:50 感谢由 百香果蜂蜜茶 对此题目的解答所做出的贡献。

D 如果新种子种植的密度要小于原始的,那么种子的cost就不会抵消省下来的,

大面积就导致了insecticide的用量整个降了下来。


这样,正确答案选D。


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  • 用户头像

    嘉仓佑措

    http://www.beatthegmat.com/genetic-modifications-to-cotton-t31971.html
    
    I think D is a trap. In the argument, we are told that the amount of insecticide needed per acre to control insect pests was only slightly lower so it doesn't matter how many acreage of cotton each type has, what matters is the comparative cost of the insecticide. 
    
    IMO In evaluate the argument questions look for a answer choice which when answered positively strengthens/weakens the conclusion and when answered negatively does the vice versa. 
    
    Choice A,B,C are unrleated to the argument(conclsuion). 
    
    Choice D looks tempting but if u answer yes and no it does not affect the conclusion both ways. 
    
    
    Choice E does this. 
    
    The conclusion is 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. 
    
    If the answer to the question for choice E is yes then it means the farmers switched to the modified seeds only bevcause they had to use large quantities of insecticides that would have costed them more(if not ther is no reason to switch) 
    
    If the answer to the question for choice E is no then it means the farmers had no good reason to switch and the the argument that modified seeds are not economically benefiicial to the farmers stands. 
    
    Hope this helps! 
    
    Regards, 
    CR
    13楼  | 2019-03-15 06:18:13 回复
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    peterbearpan

    E不能选是因为,如果原来用的农药正常,那么转基因种子就是省一点农药;如果超量,那么转基因种子依旧还是省得不多。换句话说,省农药的值是恒定的,无论原来种子用的农药多还是少,转基因种子都省不了多少。但感觉D也无关,因为虽然种植面积总量可能大,但原文明确说了是每公顷使用农药的量只是slightly lower
    12楼  | 2019-03-10 14:36:44 回复
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    考到770不是梦

    同感觉e好……
    11楼  | 2018-09-10 09:54:30 回复
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    秋秋要GMAT700呦

    一开始选了D,但是现在感觉E更好。
    D 说转基因作物的种植面积会不会和原始作物一样大。原文说每亩的杀虫剂数量差不多,就算转基因作物面积更大 成本更高 但是它本身种植的利润也会同比增加 所以不能判断是不是economically。
    E 农民是不是习惯性的多使用杀虫剂。如果是的话 就说明转基因作物其实是更经济的。
    10楼  | 2018-08-12 20:29:15 回复
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    tessie320

    此题没争议,注意B结尾处used on other crops,引入了其他的农作物,应该是ordinary seed。
    Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.
    9楼  | 2018-06-20 16:23:21 回复
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    雷哥GMAT的小7

    本题目是一道争议题,严格来说是没有正确答案的。大家不用太纠结。
    8楼  | 2018-04-11 17:32:55 回复
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    savant

    economy of scale
    7楼  | 2017-12-12 12:34:22 回复
    • 评论用户头像
      savant: 应该是D,我一开始也是选的B,应该是D,没什么争议

      2017-12-12 12:34:58 回复

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  • 用户头像

    我要720

    怎么跟密度有关系了?
    题设说的是insecticide needed per acre,D选项里面 种改良种子的面积再大,per acre还是没变的啊
    6楼  | 2017-12-08 11:42:46 回复
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    舒服是留给死人的

    acreage 大了
    5楼  | 2017-10-20 20:51:36 回复
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    Ashinxgy

    争议题,不看了。。。
    4楼  | 2017-09-16 20:22:33 回复
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