[讨论]XDF补充材料上的最新机考题（一）

ring_cheng

146.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 thae 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, ther will be no new industrial development around the lake that will create renewed pollution in its waters.

B. Other than the possibility of a leak, ther is no realistic pollution threat posed to the lake by the pipelines's constrction.

C. Ther is no reason to believe that the leak-preventing technology would be ineffective twhen installed in the pipeline in Lake Konfa.

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

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.

Key:B

请大家讨论一下C的错误：There is no reason to believe that the leak-preventing technology would be ineffective twhen installed in the pipeline in Lake Konfa. 是不是因为文中已经指明："provided this technology is effective"，所以无需考虑技术的有效性问题？

ring_cheng

I am looking up

you are showing up

and then we both cheering up

'coz the problem has been ended up

But what i can do now is only up up up......

lawyer_1

你是对的，原文的结论是有前提的，所以不必要再假设这个前提。比如你说：如果我一天24小时在CD上，就能考800分。你不必假设你一天能24小时在CD上。

ring_cheng

Thanks, Lawyer,

winsx2008

问一下 a 为什么不对? 对a取非就是说有别的工厂会产生污染 削弱结论......