The 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.

參考答案：D

　　「解析」本題是一道歸納推導(dǎo)題。題干已明確指出該題的答案信息來源在第三段。第三段主要陳述“density-dependent factors”的作用，過仔細(xì)閱讀第三段，尤其是第三段的最后三句話，考生可以得知本文作者在第三段是在強(qiáng)調(diào)“density-dependent factors”的作用�？梢奃是本題的正確選項(xiàng)�？忌�在理解原文時(shí)一定要注意掌握歸納推導(dǎo)的能力。

來源：網(wǎng)絡(luò)整理 免責(zé)聲明：本文僅限學(xué)習(xí)分享，如產(chǎn)生版權(quán)問題，請(qǐng)聯(lián)系我們及時(shí)刪除。

《The discussion concerning population in the third paragraph serves primarily to》由互聯(lián)網(wǎng)用戶整理提供,轉(zhuǎn)載分享請(qǐng)保留原作者信息,謝謝!
鏈接地址：http://m.seogis.com/gongwen/792435.html

• 上一篇：According to the text， all of the following behaviors have been exhibited by different populations EXCEPT
• 下一篇：In the text， the author does all of the following EXCEPT