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新托福阅读词汇150题(1)：valuable&exact

2015-08-10 17:16:56来源：网络

　　【新托福阅读词汇150题(1)：valuable&exact】新托福TPO阅读中，词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题：valuable&exact。

　　Paragraph 3: 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. 【OG- The Origins of Cetaceans】

　　3. The word “precious” in the passage is closest in meaning to

　　○exact

　　○scarce

　　○valuable

　　○initial

　　答案见下一页：

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