天山逻辑

paopao

Q3:

Scientists have made genetic modifications to cotton to increase its resistance to insect

pests. According to farmers’ reports, 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 farmers 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

答案是B 我选的是D

我想每亩省一点如果量大的话 一样也可以省不少钱的 如果量小的话的 确实没有效果 所以我选D

而B说的是棉花的杀虫刹与其它作物比 贵不贵 我认为是无关的比较 如果有的作物非常贵 有的作物非常便宜 根本没法比较的 所以我认为B错

我的想法对吗 谢谢

lawyer_1

D 的意思为平均讲，用modified seed 的农民种的棉花亩数是否和 用ordinary seed 种的亩数一样多。它的是和否的回答对结论不起作用，种多种少看不出有何影响。因为modified seed 种的越多，节省的农药越多，但花在种子上的钱也越多，两方面那个大，原文看不出来。

paopao

lawyer:谢谢你的答复

B呢 原文没讲其它作物的杀虫刹的价钱 更是无从比较

B说的是棉花的杀虫刹与其它作物比 贵不贵 我认为是无关的比较 如果有的作物非常贵 有的作物非常便宜 根本没法比较的 所以我认为B错

就是比其它作物贵, 贵多少 如果花在种子的钱更多呢 也是对结论不起作用

lawyer_1

这题讨论过，我认为B的OTHER CROPS包括modified seed （我论证过，你看能否查到以前的贴），即modified seed 的农药是否比ordinary seed 的贵。它的对和否的回答能对原文结论其支持和削弱作用。

paopao

laywer:

1 我认为不能把other crops 认为包含了modified seed 因为原文没提 不能这样假设 怕是查不着了旧贴了

2 即使包含了modified seed, 这题中也有其它变量 如花在种子上的钱 与省的钱比较 两个方面比较 哪个大看不出来

谢谢

lawyer_1

other crops包括modified seed谁说是推出来的，是OTHER本身的含义，它的意思为除前面提到的东西外的东西，句子前面只提到ORDINARY COTTON，除ORDINARY COTTON外的CROPS难道不包括MODIFIED COTTON吗。

是否起支持和削弱作用你又陷入了MUST BE 的陷阱。

paopao

lawyer:

读完这题我知道答案是另外的一些花费 如果B是Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on modified seed B是没有疑问的

你在二楼说到

D 的意思为平均讲，用modified seed 的农民种的棉花亩数是否和 用ordinary seed 种的亩数一样多。它的是和否的回答对结论不起作用，种多种少看不出有何影响。因为modified seed 种的越多，节省的农药越多，但花在种子上的钱也越多，两方面那个大，原文看不出来。

这是不是也是在must be true的陷阱里

lawyer_1

种的MODIFIED SEED多对它的正面和负面的影响是一样的，没有倾向性。所以不起支持或削弱的作用，并不是因为MUST BE 的错误不起支持或削弱的作用。B说农药贵与不贵，对它是负面的和正面的影响，有倾向性，所以起支持和削弱的作用。两者如何能比。

shuijingwawa

Trade-off: slightly lower quantity of pesticide and higher cost for  modified seeds.

other reason: B  whether the price of the pesticide for ordinary seed was higher. If yes, than save money

alan16

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

選項E的意思是什麼呢?

是不是說他們用很多農藥,不是因為new seed需要用很多農藥,而是他們已經習慣用很多農藥???