GMAT一道CR,help~Until recently it was thought that ink used be
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我觉得是题干中结论的矛盾性it not only strongly supports the hypothesis that B-36 was printed by Gutenberg but also shows that the presence of titanium in the ink of the purportedly fifteenth century Vinland Map can no longer be regarded as a reason for doubting the map’s authenticity.
由Gutenberg写的Bible中出项钛,和B36中出现钛推出B36是Gutenberg写的,中间的暗含假设是15世纪 墨水中很少出现钛extremely restricted
而推出一个十五世纪含钛的Map不能断定为假货的暗含假设是在15世纪,墨水中有钛是很正常的.既是 not restricted
所以A选项是说文章中推论过程中的假设矛盾 that the use of titanium as an ingredient in fifteenth-century ink both was,and was not,extremely restricted
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