标题: One CR [打印本页] 作者: redpot 时间: 2002-7-24 01:59 标题: One CR
Every human being who has ever lived had two parents. Therefore, more people
were alive three thousand years ago than are alive now.
The reasoning in the argument is flawed because it
A. overlooks the number of people in each generation during the last three
thousand years who left no descendants
B. disregards possible effects of disasters such as famines and plagues on
human history
C. overestimates the mathematical effect of repeated doublings on population
size
D. fails to take into account that people now alive have overlapping sets of
ancestors
E. fails to consider that accurate estimation of the number of people alive
three thousand years ago might be impossible作者: primefang 时间: 2002-7-24 09:09
I think the kdy is C . others are all irrelevant choices作者: tongxun 时间: 2002-7-24 12:18
I choose D.
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