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题库 / GMATLA-CR-83
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?
Whether plant scientists have developed insect-resistant seeds for every crop that is currently grown commercially
Whether farmers typically use agricultural pesticides in larger amounts than is necessary to prevent crop damage.
Whether plants grown from the new genetically engineered seeds can be kept completely free of insect damage.
Whether seeds genetically engineered to produce insect-resistant crops generate significantly lower per acre crop yields than do currently used seeds.
Whether most varieties of crops currently grown commercially have greater natural resistance to insect damage than did similar varieties in the past.
为什么B不对？Farmer不管有没有需要都多用农药，同时undermine 省农药和消费者认可两个方面
不是有没有需要都用很多杀虫剂，而是如果农民用杀虫剂就用的量会比必须的要多
但是不论他原来用多少杀虫剂，按照题目的说法，使用了转基因就会比传统所用的杀虫剂少些，是一个相对的量，所以并没有weaken到
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