Although the pesticides used in nearby fields are the primary cause of pollution in the Ellenville River, researchers believe thatincreased automobile traffic in the immediate vicinity is a contributing cause, since nearly all water samples taken from the river show signs of contamination from vehicular emissions. Such emissions are not typically considered a major source of water pollution, but researchers hypothesize that vehicular emissions are the source of more pollution in the Ellenville River than are pesticides.
Which of the following, if true, most strongly supports the researchers.hypothesis?
(A) Research has shown that there is more pollution from vehicular emissions in the Ellenville River than in any other river within a 500 miles radius.
(B) The water fltration system that produces drinking water for Ellenville is speci.cally designed to protect against the pesticides used in nearby fields.
(C) Water samples from the Ellenville River taken fifty years ago show evidence of pollution from vehicular emissions.
(D) In laboratories without the most sophisticated diagnostic tools, it is difficult to di¤erentiate between types of water pollutants.
(E) The diseases caused by the different forms of water pollution cause different health problems, and the illnesses caused by vehicular emissions are much more prevalent in Ellenville than are those caused by pesticides.
答案选E
但我选了B，我觉得B是排除了pesticides pollution，所以support了科学家的观点。
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发表于 2010-9-1 15:23:32
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