新PREP1-98

ddavidd

98.   (32682-!-item-!-188;#058&006783)     (GWD 28-Q29)

    

D

    

Early
in the twentieth century, Lake
                Konfa
became very polluted.  Recently fish
populations have recovered as release of industrial pollutants has declined and
the lake’s waters have become cleaner. 
Fears are now being voiced that the planned construction of an oil
pipeline across the lake’s bottom might revive pollution and cause the fish
population to decline again.  However, a
technology for preventing leaks is being installed.  Therefore, provided this technology is
effective, those fears are groundless.

    

 

    

The
argument depends on assuming which of the following?

    

 

    

A.
Apart from development related to the pipeline, there will be no new industrial
development around the lake that will create renewed pollution in its waters.

    

B.
There is no reason to believe that the leak-preventing technology would be
ineffective when installed in the pipeline in Lake
                    Konfa.

    

C. The bottom of the lake does not contain toxic remnants of earlier
pollution that will be stirred into the water by pipeline construction.

    

D.
Damage to the lake’s fish populations would be the only harm that a leak of oil
from the pipeline would cause.

    

E.
The species of fish that are present in Lake
                    Konfa
now are the same as those that were in the lake before it was affected by
pollution.

答案是C, 不知道为什么D不对

我觉得是更广泛的非泄漏的原因, 比如说除了河底的泥, 还有防漏的材料, 管子本身等等, 这些不是都得排除才行么?

[此贴子已经被作者于2009-4-8 11:10:02编辑过]

stellachan

管道不漏-->鱼不会减少

问assumption

D 管道泄漏只能造成鱼的减少

取非：管道泄漏不止导致鱼的减少，还产生其他问题。

不能削弱原文，反而证明了管道泄漏导致鱼减少。

问下B为什么不对???

stellachan

UP 解释下B

zuozuox

B为什么不对啊？

lihanljz

因为题目中已经说了provided this technology is effective

cannahere

我觉得可能是这题可能是这样的：
文中提到一种说法是：油管的安装（因为可能会漏油）会再次造成污染和鱼的减少
然后文中又提出，一个防漏的技术被安装，因此（结论）： 如果这个技术是有效的，那么前面的说法就是错误的（“无依据的”），

注意这个结论是一个有条件的结论，在这个条件下，B首先被排除，因为它说的和结论中的条件是相反的，也就否定了结论；

然后我们再看一下结论： 如果这个技术是有效的，那么前面的说法就是错误的，换言之： 如果这个技术是有效的，那么油管的安装不会造成污染和鱼的减少，主语是：“油管的安装”，就是在就“油管的安装”谈事情，题目要我们找这个结论的assumption，正确答案一定会和油管的安装有关。然后再看选项
A. 除了和油管有关的development。。。不讨论油管了，直接讨论别的事情了-----该选项无关。
C.河底有残留的污染存在，安装油管时会又被掀起-----直接相关
D.漏油对鱼种的影响是唯一的破坏----有点关系，不过偏题了
E.直接说鱼去了，油管的影子都看不见了----无关

因此选C

以上纯属个人分析，欢迎拍砖

jbc88

B为什么不对啊？

-- by 会员 zuozuox (2009/8/22 18:06:00)

同问。

onlylee0302

5楼的解释很清楚，谢谢