Capuchin monkeys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins. Some scientists hypothesize that the monkeys rub their bodies with the millipedes because doing so helps protect them from mosquitoes. Fact:一种猴子经常用某种动物来摩擦身体。 Evidence:这些动物尸体的分泌物富含两种有效驱逐蚊子的化学物质;而蚊子带有使猴子致病的寄生虫。 Conclusion:科学家猜测猴子拿这些动物来摩擦使为了使它们自己远离蚊子。 找个答案支持科学家假设的,即猴子们这么做就是为了赶蚊子用的。ABE无关,D也无关,吃不吃这些动物跟科学家的推测没有关系。C说只有雨季的时候猴子们才那么干,而雨季时蚊子是最多的,从而support the hypothesis。 |