GWD-18-Q30

The ancient Nubians inhabited an area in which typhus occurs, 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?

A.      Infectious diseases other than typhus to which the ancient Nubians were exposed are unaffected by tetracycline.

B.       Tetracycline is not rendered ineffective as an antibiotic by exposure to the processes involved in making bread and beer.

C.      Typhus cannot be transmitted by ingesting bread or beer contaminated with the infectious agents of this disease.

D.      Bread and beer were the only items in the diet of the ancient Nubians which could have contained tetracycline.

E.       Typhus is generally fatal.

answer B, i choose D, actually, didn't really understand the puzzle...can anyone guide and give a chinese translation? thx!

本人观点：

Tetracycline作为抗生素，可以抵制疾病typhus的发生。但是，Tetracycline的有效，必须建立在假设：在将（含有丰富的能够生产Tetracycline的细菌的）谷物制造成食物bread and beer的过程中，抗生素Tetracycline没有失去效用。否则，他将不能抵制疾病typhus的发生，推翻结论。

将D取非，其他食物也可以产生抗生素Tetracycline不能推翻结论

我也选的D

其实最近发现很多的assumption 题有一个解题方法,

Thus, tetracycline in their food probably explains the low incidence of typhus among ancient Nubians.

所以选项中一般是对这个论述的取非选项是正确的.

B.       Tetracycline is not rendered ineffective as an antibiotic by exposure to the processes involved in making bread and beer

 其他很多关于其他名词的陈述多为迷惑选项.

welocme discuss.