GMAT申友逻辑CR题库-Early in the twentieth century, Lake Konfa became very polluted. Recently fish populations have recovered as release of industrial-破解版08-真题答案解析

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CR98-107题

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.

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答案：

早期K湖�

�污染了，现在随着工业污染的减少，这个湖里的鱼数量恢复，湖水也变清了。现在有个担忧：打算在这个湖底建一个石油管道，这样会重新研发湖水污染、鱼的数量会重新减少。但是现在，一个防泄漏装置已经被安装，如果这个装置有效，这个担忧就没有依据了

问结论前提

题目中的fear是指pipeline的建造会引起revived pollution.结论是说假设technology effective,那么fears是groundless.即只要installation of the new technology能effective，那么就不会有revived pollution，fears就是groundless.

A 除了管道之外，湖周围没有其他的工业可以产生污染。

讨论pipeline之外的污染源无意义，只要设备有效，管有没有其他的污染都无关

B 没有理由相信，这个管道设施是无效的。削弱结论

C 湖底没有包含会被管道工程搅起来的早期污染物。

D 安装管道会引起的唯一问题就是对鱼类数量的破坏。削弱结论了

E 现在的与跟之前收到污染的鱼都是一样的。无关鱼的种类，排除