As Charles Darwin observed, natural selection operates whenever individuals of one genetic composition are better at reproducing than that of others.
这里是比较individuals of 一组 与 indivuduals of 另一组，所以要用复数those
再者the other指两者直接，another指三者之间
A. that of others
B. the other
C. another
D. those of another （D)
E. that of the next
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发表于 2017-5-23 17:35:12
