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29. 我支持B 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 pes- ticide, 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. 新种子很能抵抗虫害. 原因: 1) 虽然新种子贵, 但今后成本会下降. 2) 用新种子可以少用很杀虫剂, 且多数消费者喜欢杀虫剂少的农作物. 结论: 所以, 在能长新种子的地方, 新种子的使用会普遍.
which of the following would be most useful to know in evaluating the argument above? 问评估 - 评估应该是评估原文的因果逻辑关系是否成立.
B. Whether farmers typically use agricultural pesticides in larger Amounts than is necessary to prevent crop damage. 针对原因1), 如果老种子过量使用杀虫剂, 则新种子的成本很有可能低过老种子. 所以会被普遍采用. 针对原因2), 如果老种子过量使用杀虫剂, 则新种子可以少用很杀虫剂. 所以会被普遍采用. D. Whether seeds genetically engineered to produce insect-resistant crops generate significantly lower per acre crop yields than do currently used seeds. 新种子的产量问题 - 从常识看有关, 但与原文因果逻辑关系无关.
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发表于 2006-10-22 19:31:00
