Reading Passage 2 has seven paragraphs, A-G. Which paragraph contains the following information? Write the correct letter, A-G

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问题 Reading Passage 2 has seven paragraphs, A-G.
Which paragraph contains the following information?
Write the correct letter, A-G.
an interesting gap in existing knowledge

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答案E

解析 PARAGRAPH E notes that it is strange, ’that no Neanderthal mitochondrial DNA has turned up in modern humans, since the usual pattern of invasion in historical times was for the invaders’ males to mate with the invadeds’ females.’
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