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息来源确定在首段的第一句，因为该句中的“all species”实际上指的就是题干中的“different populations”。从第一段的首句入手并且仔细阅读首段的第二句，就可以找出本题的正确选项D，因为该选项所传达的信息与原文第一段第一、二句所传达的信息不一致。考生在解题时一定要学会迅速审题定位的能力。----------------------------------------4The discussion concerning population in the third paragraph serves primarily to A.demonstrate the difficulties ecologists face in studying density-dependent factors limiting population growth.B.advocate more rigorous study of density-dependent factors in population growth.C.prove that the death rates of any population are never entirely density-independent.D.underline the importance of even small density-dependent factors in regulating long-term population densities. 参考答案： D 本题是一道归纳推导题。题干已明确指出该题的答案信息来源在第三段。第三段主要陈述“density-dependent factors”的作用，通过仔细阅读第三段，尤其是第三段的最后三句话，考生可以得知本文作者在第三段是在强调“density-dependent factors”的作用。可见D是本题的正确选项。考生在理解原文时一定要注意掌握归纳推导的能力。----------------------------------------5In the text， the author does all of the following EXCEPT A.cite the views of other biologists.B.define a basic problem that the text addresses.C.present conceptual categories used by other biologists.D.describe the results of a particular study. 参考答案： D 本题是一道写作手法题。这是一道比较难的题目，旨在考察考生的语言功底。本文作者在论述自己的观点时运用了各种写作手段。选项A、B、C中所涉及的内容分别在第一段、第三段和第二段中出现。考生一定要提高对原文各种写作手段的认识。----------------------------------------1In the text,the author is primarily concerned with A.identifying the kinds of thinking that are used by technologists.B.stressing the importance of nonverbal thinking in engineering design.C.proposing a new role for nonscientific thinking in the development of technology.D.contrasting the goals of engineers with those of technologists. 参考答案： B 这
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