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  3. Recently discovered fossil remains strongly suggest that the Australian egg-layi

Recently discovered fossil remains strongly suggest that the Australian egg-layi

游客2025-02-25  7
问题 Recently discovered fossil remains strongly suggest that the Australian egg-laying mammals of today are a branch of the main stem of mammalian evolution rather than developing independently from a common ancestor of mammals more than 220 million year ago.
选项 A、rather than developing independently from
B、rather than a type that developed independently from
C、rather than a type whose development was independent of
D、instead of developing independently from
E、instead of development that was independent of
答案 B
解析 本句同样是一个并列结构，即“are sth．rather than sth…”，“是某物而不是另一物”，根据并列连词的形式对等原则，A、D错。在rather than(instead of)之后用的是动名词短语，而are之后是名词a branch，形式不对等。B、C、E从形式上都满足对等原则。再根据句意，发现E中的a development与are后的a branch虽都是名词，但却不属同一类范畴。A branch指一类动物，是具体名词，a development指一抽象动作，从性质上两者不对称，排除E。在B、C中，根据句意，存在着一个相比较关系，简化后B成为：A type developed independently from acommon ancestor；而C为a type’s development independent of a common ancestor，显然C中的比较是不对等的。a type(指一类动物)与a common ancestor属同类，而development与a commonancestor不属同类。
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