Re: [請益] TPO 2 THE ORIGINS OF CETACEANS

看板TOEFL_iBT (TOEFL_iBT托福)作者Merica (美加文教)時間14年前 (2011/09/29 16:24)推噓0(0推 0噓 0→)

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※ 引述《vul3sm3c96 (小女孩)》之銘言： : The fossil consists of a complete skull of an archaeocyte, an extinct group : of ancestors of modern cetaceans. Although limited to a skull, the Pakicetus : fossil provides precious details on the origins of cetaceans. The skull is : cetacean-like but its jawbones lack the enlarged space that is filled with : fat or oil and used for receiving underwater sound in modern whales. : Pakicetus probably detected sound through the ear opening as in land mammals. : The skull also lacks a blowhole, another cetacean adaptation for diving. : Other features, however, show experts that Pakicetus is a transitional form : between a group of extinct flesh-eating mammals, the mesonychids, and : cetaceans. It has been suggested that Pakicetus fed on fish in shallow water : and was not yet adapted for life in the open ocean. It probably bred and gave : birth on land. : 題目是 : Pakicetus and modern cetaceans have similar : (B) adaptations of diving : (C) skull shapes : 答案是C但我寫B : 我知道C是對的但是第七行的another cetacean adaptation for diving又 : 要怎麼解釋呢?? : 謝謝大家 : 最近有點被托福弄的瘋瘋癲癲啊@@ 文:"The skull also lacks a blowhole, another cetacean adaptation for diving." 意為Pakicetus缺少blowhole,而blowhole卻是cetacean為了適應diving而發展出的特性, 所以簡單說：Pakicetus沒有(lacks)blowholeㄝ, cetacean卻有,故（B）錯。（以上內容由美加黃冠文教授提供） -- ▅▅▅▅ ▅▅ ▅▅▅ ▅ ▅▅ ▅▅▅ █ █ █ █▅ █▄█ ▄ █ █▄█ █ █ █ █▄ █◥▅ █ █▅ █ █ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.248.105.42