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Jones: Prehistoric wooden tools found in South America have been dated to 13,000 years ago. Although scientists attribute these tools to peoples whose ancestors first crossed into the Americas from Siberia to Alaska, this cannot be correct. In order to have reached a site so far south, these peoples must have been migrating southward well before 13,000 years ago. However, no such tools dating to before 13,000 years ago have been found anywhere between Alaska and South America.
Smith: Your evidence is inconclusive. Those tools were found in peat bogs, which are rare in the Americas. Wooden tools in soils other than peat bogs usually decompose within only a few years.
18. Smith responds to Jones by
(A) citing several studies that invalidate Jones’s conclusion
(B) accusing Jones of distorting the scientists’ position
(C) disputing the accuracy of the supporting evidence cited by Jones
(D) showing that Jones’s evidence actually supports the denial of Jones’s conclusion (e)
(E) challenging an implicit assumption in Jones’s argument
文中s说的（绿色标出的）是怎么和前者说的联系在一起的？
e中说的implicit assumption是什么？（使我用黄色标出的吗？）
我选了c，请问那里错？
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发表于 2005-2-26 18:40:00
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