prep1-27

marsa1989

prep1-27
    

27.     
                

Plant scientists have used genetic engineering on seeds to produce crop plants that are highly resistant to insect damage.  Unfortunately, the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones.  Thus, for most farmers the savings on pesticides would not compensate for the higher seed costs and the cost of additional fertilizer.  However, since consumer demand for grains, fruits, and vegetables grown without the use of pesticides continues to rise, the use of genetically engineered seeds of this kind is likely to become widespread. 
                

In the argument given, the two portions in boldface play which of the following roles?

(A) The first supplies a context for the argument; the second is the argument's main conclusion.

(B) The first introduces a development that the argument predicts will have a certain outcome; the second is a state of affairs that the argument denies will be part of that outcome.

(C) The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.

(D) The first provides evidence to support a prediction that the argument seeks to defend; the second is that prediction.

(E) The first and the second each provide evidence to support the argument's main conclusion.

A为什么不对呢？第二个的确包含main conclusion啊。答案是C，C说 the argument predicts will have a certain outcome，可是整个结论不是要以however后的为主么？前面不是他预测的后果吧，自己后面又反驳了的，那预测的就该是become widespread吧？

盼望牛牛回复！！！

ada3063

根我错的一样。同等

marsa1989

up！盼回复！

Tippingpoint

我最先也是选的A,后来跟c比较, 这是我的想法:
 the seeds themselves are quite expensive, and the plants require more fertilizer and water to grow well than normal ones - 这其实是作者摆的事实用来预测正因为这样可能农民不会用改良种子.

prediction就是Thus,
for most farmers the savings on pesticides would not compensate for the
higher seed costs and the cost of additional fertilizer.
            

However,
since consumer demand for grains, fruits, and vegetables grown without
the use of pesticides continues to rise, the use of genetically
engineered seeds of this kind is likely to become widespread.  - 这是作者提出的consideration,就因为这样原来的prediction就被反驳了.

请探讨.

linuxzh

分析的不错. agree you.

幕楠

我也同意,同时我对A的看法是.

A 选项后半部说第二部分是结论,而这段或不仅有结论(the use of genetically engineered seeds of this kind is likely to become widespread.  )并且同时也说了支持结论的原因.所以A 的说法是片面的

rosyrosy00

以下是引用幕楠在2008-11-24 23:59:00的发言：

我也同意,同时我对A的看法是.

A 选项后半部说第二部分是结论,而这段或不仅有结论(the use of genetically engineered seeds of this kind is likely to become widespread.  )并且同时也说了支持结论的原因.所以A 的说法是片面的

原来是这样，可以理解A为什么不对了。

ivymxy

up

wjfruc

A中supply a context for the argument 在文中并无此功能

tiffany1102

up..