深夜游荡在CD，求教gwd 逻辑一题，求解！！！！！

bhchka

GWD-24-29.

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.

这一题的答案选的是C，我还是能理解的。但是我做到的时候选的是B，我当是的思路是对B肯定回答，弄明伯伯平时用的农药是比必需的多了，所以说正常的农药必需量没有实际那么多，所以用就的方法继续种植还是可以的，否定回答，没有比必需的多，所以才用新的种植方法会更好。后来我仔细想了想是不是这个选项没有突出于新的种植方法的比较，所以逻辑上不对啊，求拍醒啊！

bhchka

GWD-24-29.

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.

这一题的答案选的是C，我还是能理解的。但是我做到的时候选的是B，我当是的思路是对B肯定回答，弄明伯伯平时用的农药是比必需的多了，所以说正常的农药必需量没有实际那么多，所以用就的方法继续种植还是可以的，否定回答，没有比必需的多，所以才用新的种植方法会更好。后来我仔细想了想是不是这个选项没有突出于新的种植方法的比较，所以逻辑上不对啊，求拍醒啊！

danhuang7

你确定是c吗？我怎么觉得是d啊