Critical Reasoning

试题详情

题目:

Maize contains the vitamin niacin, but not in a form the body can absorb.  Pellagra 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.  Pellagra 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?

选项:

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.

答案:

C

提问:

逻辑看不懂
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提问:

我读出原文的信息就是:M包含了N这个东西,但是并不能被人体所吸收。P是一种疾病和N有关系。当M这个东西由美国出入欧洲后,变成了一个 dietary staple,很多欧洲人又怎么了。然而,美国人又怎么着了。问题问最能解释这个现象的原因? A是说m在欧洲很流行是因为什么。 B是说M在美国生长会有更多的N相比M在英国生长。 C说制作M的传统方式在美国会改变M里面的N的含量 D说欧洲那些消费M的人也吃很多含有N的食物。 E说疾病传播的事。 我的解题思路是:问解释现象,现象是说在美国和在欧洲的差异,而且强调的是美国,所以答案应该跟N在美国有关系。排出了ADE。 BC改怎么比。我当时想着B即提到了欧洲又提到了美国沾边的几率比较大,就选了B。结果错了。而且这道题我做了三分钟,老师如何能一眼就扫到答案啊~
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