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ablishing a direct link between early large mammals and their modern counterparts D.analyzing the ecological basis for the dominance of some carnivores over other carnivores 参考答案： B 本题是主旨考题。根据文章的首段我们可以看出，文章讲了在草原上的早期哺乳动物由于所处的地位不同从而使其智力的进化分成了不同的方向，文章的末段讲了哺乳动物的发展和猎食是由神经系统决定的，所以结合起来讲的是动物的智力和发展环境间的关系论述，此题应该选择B。----------------------------------------2According to the passage, as the process of arousal in an organism continues, all of the following may occur EXCEPT. A.the production of adrenaline B.the production of norepinephrine C.a heightening of sensitivity to stimulate D.an expansion of the range of states mediated by the brain stem 参考答案： D 本题是正误判断考题。根据文中第二段的意思，我们可以知道脑干的作用范围是固定的，与刺激大小无关，只有D选项的语义表达和文中的语义相关所以答案应该选择D,而其他几项都会发生变化。----------------------------------------3According to the passage, improvement in brain function among early large mammals resulted primarily from which of the following? A.Interplay of predator and prey. B.Persistence of free floating awareness in animals of the grasslandsC.Gradual dominance of warm blooded mammals over cold blooded reptiles.D.Interaction of early large mammals with less intelligent species. 参考答案： A 这是因果逻辑考题。我们可以看出文章通篇讲述了食肉动物与食草动物的相互作用是导致智力进化的根源，根据文章第三段和第四段，我们不难发现选项A表达的语义正是对文中语义的替换和表达，所以应该选择A选项。----------------------------------------4The author refers to a hungry lizard (last paragraph) primarily in order to. A.demonstrate the similarity between the hunting methods of mammals and those of no mammals B.broaden the application of his argument by including an insectivore as an example C.make a distinction between higher and lower levels of consciousness D.provide an additional illustration of the brutality characteristic
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