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标题: gwd 5 16 [打印本页]

作者: captainer 时间: 2013-4-11 07:12 标题: gwd 5 16

GWD5-Q16:
Maize contains the vitamin niacin, but not in a form the body can absorb. ellagra is a disease that results from niacin deficiency. When maize was introduced into southern Europe from the Americas in the eighteenth century, it quickly became a dietary staple, and many Europeans who came to subsist primarily on maize developed pellagra. ellagra was virtually unknown at that time in the Americas, however, even among people who subsisted primarily on maize.

Which of the following, if true, most helps to explain the contrasting incidence of pellagra described above?
A Once introduced into southern Europe, maize became popular with landowners because of its high yields relative to other cereal crops.
B Maize grown in the Americas contained more niacin than maize grown in Europe did.
C Traditional ways of preparing maize in the Americas convert maize’s niacin into a nutritionally useful form.
D In southern Europe many of the people who consumed maize also ate niacin-rich foods.
E Before the discovery of pellagra’s link with niacin, it was widely believed that the disease was an infection that could be transmitted from person to person.

是C
請問A翻譯為何?

作者: STshadow 时间: 2013-4-11 21:21

因為相較其他作物其產量來得高，玉米一旦引進南歐就很受地主歡迎。

作者: maxwhite 时间: 2013-4-12 06:45

玉米中含的N不能被人体吸收的，美国人知道怎么把玉米N加工成可以吸收的vitamin，欧洲人不懂。。。。所以欧洲人就有了P，美国人都不知道神马是P

问题就是怎么解释同样吃Maize，为什么一个会得P，一个不会得。

看答案：
A；很多欧洲地主成了玉米的粉丝，因为比其它的作物高产，这是属性，不能解释差距
B：在美国的比在欧洲的玉米富含N多，貌似可以解释，暂时保留
C：原来欧洲人都不懂怎么把N转换成有用成分，那即使你N再多，还是吸收不了，比B好
D：不是解释问题
E：跑题

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