GWD-24-29. 求解。

ruirui_hsu

GWD-24-29.

Plant scientists have been able to genetically engineer vegetable seedsto produce crops that are highly resistant to insect damage. Althoughthese 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 theargument above?

A.Whether plant scientists have developed insect-resistant seedsfor every crop that is currently grown commercially (2’12”)

B.Whether farmers typically use agricultural pesticides in largeramounts than is necessary to prevent crop damage.(This choice violates the premise.)

C.Whether plants grown from the new genetically engineered seedscan be kept completely free of insect damage.(Whether the genetically engineered seeds can be kept completely free of insect damage is irrelevant. Less pesticide is ok.)

D.Whether seeds genetically engineered to produce insect-resistantcrops generate significantly lower per acre crop yields than docurrently used seeds.(.)

E.Whether most varieties of crops currently grown commercially havegreater natural resistance to insect damage than did similar varieties in the past. (This comparison is nonsense. The argument makes the comparison between currently grown crops and newly genetically engineered crops.)

我选的A 答案是D。不懂啊。
我觉得D中，单位面积产量是否低了也无所谓吧。如果价格高了就可以弥补啊。况且，消费者更加关注是否less-pesticide, 所以这才是重点啊。

跪求解释！！

lhb2612530

对A，如果所有市面上的种子都有抗虫性，那文中的corp确实不可能成为norm，削弱；取非，不是所有的种子都有抗虫性，同样构成削弱。对D，GMat考试让我们选出一个相对正确的答案，只要增大可能性即可，不是绝对的，另外我觉得楼主你推理过度了

ruirui_hsu

对A，如果所有市面上的种子都有抗虫性，那文中的corp确实不可能成为norm，削弱；取非，不是所有的种子都有抗虫性，同样构成削弱。对D，GMat考试让我们选出一个相对正确的答案，只要增大可能性即可，不是绝对的，另外我觉得楼主你推理过度了

-- by 会员 lhb2612530 (2011/7/15 1:04:27)

其实我看到 A说 every crops的时候也是觉得过于绝对。
呵呵 好，谢谢你，我再理解理解。呵呵 理解出来跟你交流下 呵呵