分析 本文是一篇议论文,其论点是最近的一项对古代和现代大象的研究提出了一个意想不到的结论:既非洲象分为两个截然不同的品种.之后运用了论据加以证明,其中还引用了Alfred Roca的话,并提出了要对非洲象进行保护.
解答 70.D 细节理解题.由题干中的"fossils",再结合文中第二段的第一句:Once they obtained DNA sequences (序列) from two fossils,mammoths and mastodons,the team compared them with DNA from modern elephants.一旦他们从两个化石(猛犸象和乳齿象)获得DNA序列,团队就会比较现代大象的DNA.故选D.
71.A 细节理解题.根据文中倒数第二段的最后一句However,the proof lay in the analysis of the DNA.题中conclusion,based on定位,与文中lay in 同义替换.故选A.
72.B 理解推断题.由题中的Alfred Roca's,找到文章的倒数第一段Since 1950all African elephants have been conserved as one species.Now that we know the forest and savanna elephants are two very distinct animals,the forest elephant should become a bigger priority for conservation purpose.再结合选项可知是关于对非洲大象的保护.故选B.
73.C 标题判断题.文章首句即点明主旨A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct species.故选C.
点评 考点:本文考察了学生的议论文型阅读理解,需要学生认真阅读原文,仔细查找文中细节,对文章脉络有整体的了解,能根据文章进行合理推断.
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