新东方网GRE频道在此和大家分享GRE官方指南中的阅读真题,希望对大家准备GRE阅读有所帮助。
OG-2
Passage 31
Recently an unusually high number of dolphins have been found dead of infectious diseases, and most of these had abnormally high tissue concentrations of certain compounds that, even in low concentrations, reduce dolphins’ resistance to infection. The only source of these compounds in the dolphins’ environment is boat paint. Therefore, since dolphins rid their bodies of the compounds rapidly once exposure ceases, their mortality rate should decline rapidly if such boat paints are banned.
1. Which of the following, if true, most strengthens the argument?
A. The levels of the compounds typically used in boat paints today are lower than they were in boat paints manufactured a decade ago.
B. In high concentrations, the compounds are toxic to many types of marine animals.
C. The compounds break down into harmless substances after a few months of exposure to water or air.
D. High tissue levels of the compounds have recently been found in some marine animals, but there is no record of any of those animals dying in unusually large numbers recently.
E. The compounds do not leach out of the boat paint if the paint is applied exactly in accordance with the manufacturer’s directions.
最新热文推荐:
更多关于GRE考试备考内容,请关注新东方网GRE频道,也可关注我们的微信平台(微信号:GRE-XDF)。
(责任编辑:马荟)