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标题: prep1-37 [打印本页]

作者: nevaeh11 时间: 2010-10-13 23:10
标题: prep1-37

Capuchin monkeys in Venezuela often rub a certain type of millipede into their fur.Secretions of these millipedes have been shown to contain two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate the capuchins.The rubbing behavior is rare except during the rainy season, when mosquito populations are at their peak.Therefore, the monkeys probably rub the millipedes into their fur because doing so helps protect them against mosquitoes.

Which of the following would it be most useful to determine in order to evaluate the argument?

(A) Whether the two chemicals provide any protection for the millipedes against their own predators

(B) Whether the type of millipede used by the capuchin monkeys in Venezuela is found in other parts of the world

(D) Whether the only time the millipedes are readily available to the capuchins is during the rainy season

(E) Whether secretions of any other insects accessible to the capuchins contain chemicals that repel mosquitoes

我明白D对谁能帮我分析一下A

作者: shirleyon 时间: 2011-5-26 16:50
分泌的这两种物质对千足虫有什么用，与原文讨论的重点没关系。
不管这物质对千足虫是否有用，猴子都会抓千足虫摸到自己身上的

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