求解~三道类似的逻辑题，但答案不一样哦

zhang2168

这三道题都是关于modified seed，选项也有重复的，但是答案都不一样。到底每一题的侧重点在哪呢？

T-3-Q3.

Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ report, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically.

Which of the following would it be most useful to know in order to evaluate the argument?

A.Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed.

B.Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.

C.Whether for most farms who grow cotton it is their primary crop

D.Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did.

E.Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide.

我选的D，答案选B

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.

我选B，答案选D

OG12 的69题

69. Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modification are equally ineffective

(B) Whether the price that farmers receive for feed corn has remained steady over the past few years

(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops

(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary

(E) Whether, for most farmers who plant feed corn, it is their most profitable crop

Argument Evaluation

Situation Farmers who grew feed corn genetically engineered to be pest resistant got yields

comparable to those of farmers growing ordinary feed corn, but did so while using less

pesticide. Since the amount saved on pesticide was rarely in excess of the extra costs for

the genetically modified corn, most farmers will probably not increase profits by choosing

the genetically engineered variety.

Reasoning Which would be most useful to know in evaluating the argument? To answer a question such

as this, one should look for information that would strengthen or weaken the argument.

If one had information that the farmers growing the genetically modified corn could

have increased their yields last year at lower cost, this would be helpful in evaluating the

argument, because this would show that the argument is weak.

A It does not matter to the argument whether there are pests against which pesticides and genetic

resistance are equally ineffective, because that is compatible with there being pests against which

they are not equally effective.

B Whether prices of feed corn go up or down affects the comparison groups equally.

C The relative cost of insecticides for other crops has no bearing on the argument because the

argument is concerned with only feed corn.

D Correct. This option provides the information that it would be most useful to know in evaluating

the argument. It shows that farmers growing genetically modified corn last year could have

attained higher profi ts than they in fact did.

E The argument concerns only the relative profitability of growing one variety of feed corn versus

another.

The correct answer is D.

zhang2168

没有人解答吗？？帮帮忙呀

DeliciaAn

T-3-Q3. Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmers’ report, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed without producing yields of higher market value, switching to the modified seed would be unlikely to benefit most cotton farmers economically. Which of the following would it be most useful to know in order to evaluate the argument? A.Whether farmers who tried the modified cotton seed had ever tried growing other crops from genetically modified seed. B.Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops. C.Whether for most farms who grow cotton it is their primary crop D.Whether the farmers who have tried the modified seed planted as many acres of cotton, on average, as farmers using the ordinary seed did. E.Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide. 这道题目的答案我觉的应该选D。B中说的other crops，不是the modified seed,我认为是无关选项。D是唯一能有点关系的。 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. 结论：能用这个。原因：1）少用pesticide 2)人们喜欢少pesticide的蔬菜 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.这个是不同于OG里的D选项的。OG-D说的是 the farmers who tried the genetically modified corn 。这个选项说的是use agricultural pesticides,没说是不是conventional seeds还是engineer vegetable seeds.所以不是很有关系。 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. genetically engineered和conventional seeds种出来的产量之间的差异对比，有差异对于要不要继续使用这个genetically engineered的seeds是非常必要的。 E.Whether most varieties of crops currently grown commercially have greater natural resistance to insect damage than did similar varieties in the past. OG12 的69题 69. Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits. 结论：不是用。 理由：花钱多。 Which of the following would it be most useful to know in order to evaluate the argument? (A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modification are equally ineffective (B) Whether the price that farmers receive for feed corn has remained steady over the past few years (C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops (D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary  这里说的是农民可能用这个genetically modified 用的insecticide用多了，用多了->花钱多；需要少用->花钱少。 (E) Whether, for most farmers who plant feed corn, it is their most profitable crop

kuanli

主要跟大家探討 GWD24-29(B) 以及 og12-69(D) 選項的疑慮, 如果有說錯請多包涵！
觀念一：Whether 題的答案必須可以 weaken 論點
觀念二：不得違反題目 premise
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.
判斷類型題目, 推論出 their use is likely to become the norm 此結果是基於兩個原因 :
1. can use far less pesticide
2. consumers prefer vegetables grown with less pesticide
B 選項錯誤的原因：
題目(pre)已說明 can use far less pesticide, 不必再去探討是否有過量使用 pesticide 的可能性, 因不管有無過量使用, engineer vegetable seeds 都可以使得農民使用較少的 pesticide, 而只要可以用較少的 pesticide 就代表支持 --> become the norm

69. Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.
判斷類型題目, 推論出 modified seed would be unlikely to increase profits 此結果是基於兩個原因 :
1. ordinary corn seed cost less
2. what these farmers saved on insecticide rarely exceeded their extra costs for seed.
D選項可以是正確答案的原因：
按照上題思路, 確實不管有沒有過量使用 insecticide, 農夫從基因改造後種子上所省下的 insecticide 錢很少會超過購買的成本（pre不會因此改變）, 但是如果農夫之所以無法省錢的原因是因為過量使用 insecticide, 那麼這就提供了一個複因 weaken『不可能會增加利潤』
>> 農夫只要少用就有可能增加利潤 --> weaken unlikely to increase profits

小小豆豆酱

我觉得第一题还是应该是b，如果说cotton的杀虫剂非常贵，节约一点点就可以把成本降低很多。而D项，农民种植多少cotton其实无关

aspi

首先一个东西能不能推广取决于它能不能让农民获利：P=R-C。 在这道题里面，拓展开来就是：利润=售出单价*产量 —（杀虫剂用量*杀虫剂单价+新品种成本价）。这题讨论per acre能不能获利就行了，单位面积是否获利。
第一道题目里面，关键词是amount，只说到了杀虫剂用量，没有说杀虫剂单价，所以选B。D为什么错，如题，能不能获利跟种植面积没有半毛钱关系。考点：vague terms
第二道题目，杀虫剂用量少了，成本价也有希望下降，那么正确答案引入产量。B错误是因为题干说了，农民不喜欢滥用杀虫剂。（感觉gmat题干每一句都有其存在的价值）考点：math error
第三道题目隐含意思是，杀虫剂节省的钱不足以覆盖成本上升，没有关于产量，单价的任何选项。只有一个：杀虫剂用量虚假。这题关键词“try out”试验，那么立刻想到样本问题，对应考点：false reporting。这个try out 就很诡异，写出来还是挺善良的。
那么问题来了，有没有可能出现第四题，考售出单价的。就是新品种定价会远高于旧品种。
所以这个题可以变花样考
我想这就是gmat的实质吧。。来来回回考那么几个东西。
我一下午就搞这个了，分享给你们。希望有用：）