题目信息
Plant scientists have been able to genetically engineer vegetable seeds to produce crops that are highly resistant to insect damage. Although these seeds currently cost more than conventional seeds, their cost is likely to decline. Moreover, farmers planting them can use far less pesticide, and most consumers prefer vegetables grown with less pesticide, therefore, for crops for which these seeds can be developed, their use is likely to become the norm.
which of the following would be most useful to know in evaluating the argument above?
A:Whether plant scientists have developed insect-resistant seeds for every crop that is currently grown commercially
B:Whether farmers typically use agricultural pesticides in larger amounts than is necessary to prevent crop damage.
C:Whether plants grown from the new genetically engineered seeds can be kept completely free of insect damage.
D:Whether seeds genetically engineered to produce insect-resistant crops generate significantly lower per acre crop yields than do currently used seeds.
E:Whether most varieties of crops currently grown commercially have greater natural resistance to insect damage than did similar varieties in the past.
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正确答案：
D:Whether seeds genetically engineered to produce insect-resistant crops generate significantly lower per acre crop yields than do currently used seeds.
“因为许多消费者喜欢杀虫剂少的蔬菜而且这个转基因种子的费用以后也会降低，所以这些种子讲渐渐普及” 问评价。 A 是否为所有蔬菜都研发了转基因种子，无关； B 是否远超出使用了杀虫所必须的杀虫剂，不合适； C 是否转基因种子能完全不用杀虫剂，不是很相关； D 是否转基因对比传统亩产明显低。因为亩产明显低，哪怕费用再低再收欢迎，农民也不会选择，则不会常态化； E 是否现在的蔬菜比过去能抗虫，无关；
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