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  3. What used to be the danger in being a man according to the first paragraph? What does the example of India illustrate?

What used to be the danger in being a man according to the first paragraph? What does the example of India illustrate?

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问题 What used to be the danger in being a man according to the first paragraph?
What does the example of India illustrate?
选项 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 tribes.
D、India is one of the countries with a very high birth rate.
答案B
解析 作者在第二段五、六句和第八句中写到："人们之间的差异以及利用这些差异进行自然选择的机会都减小了。印度的情形正说明了这一点"。"今天总的趋中性—个体的成活率和后代的数量都是相同的—意味着：与部落阶层相比，印度的中等以上阶层，已经失去了80%的自然选择能力"。只有"自然选择在富人中和穷人中几乎不起作用了"与上面几句话的意思最为贴近。
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