[問題] GWD 18-30

由 **FionaV** » 2005-12-04 12:20

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.

Ans: B

請問Tetracycline跟Beer和Bread的製作過程有什麼關係呢?

由 **fiona** » 2005-12-04 13:52

This bacterium can flourish on the dried grain used for making two staples of the Nubian diet, beer and bread.
因為這個有用的細菌是存在於用來做麵包與啤酒的grain裡
可是並沒有說麵包跟啤酒含有豐富的細菌
除非加上B選項的條件
才能證明多吃麵包跟啤酒真的替Nubian人免於疾病
請參考囉~~~