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标题: GWD-29-38请教解题思路 [打印本页]

作者: sv2000 时间: 2005-11-10 20:32
标题: GWD-29-38请教解题思路

The ancient Nubians inhabited an area in which typhus occurred, yet surprisingly few of their skeletons show the usual evidence of this disease. The skeletons do show deposits of tetracycline, an antibiotic produced by a bacterium common in Nubian soil. This bacterium can flourish on the dried grain used for making two staples of the Nubian diet, beer and bread. Thus, tetracycline in their food probably explains the low incidence of typhus among ancient Nubians.

Which of the following is an assumption on which the argument relies?

The tetracycline deposits did not form after the bodies were buried

The diseases other than typhus to which the ancient Nubians were exposed would not be affected by tetracycline.

Typhus is generally fatal.

Nubian grain became contaminated with tetracycline-producing bacteria prior to being harvested.

Bread and beer were the only foods eaten by the ancient Nubians which could have contained tetracycline.

作者: yangsh 时间: 2005-11-10 21:06

取非，Te did form after the bodies were buried.说明是在人死后，Te 抑制了Ty。因此无法说明人生前是由于吃带有这个东西的食物导致的ty 少。

作者: howardwang 时间: 2005-11-10 23:33

支持A

作者: sv2000 时间: 2005-11-11 09:11
谢谢分析！

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