What does the example of India illustrate? -考呗网

公共英语四级

单选题What does the example of India illustrate?

A．Wealthy people tend to have fewer children than poor people．
B．Natural selection hardly works among the rich and the poor．
C．The middle class population is 80％smaller than that of the tribes．
D．India is one of the countries with a very high birth rate．

参考答案：B进入在线模考

本文第二段最后两句话表示这个国家给大城市的一部分人提供了财富，而其余的部落民族却一贫如洗。今天众多的普通人，每个人在存活子女的数量方面都一样，这意味着：与部落相比，自然选择在印度的中上阶层已失去了80％的效应。这与B中的“自然选择在富人与穷人中已很难起作用”的意思相吻合，故应选B。A富人生的孩子没有穷人生得多，与上面的表述相矛盾。C中等阶层的人口比部落人口少80％和D印度是个高出生率的国家，文中都未提及。

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