2008 年考研英语完形填空真题解析 The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name
But Gregory Cochran is 1 to say it anyway
He is that 2 bird, a scientist who works independently 3 any institution
He helped popularize the idea that some diseases not 4 thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested
5 he, however, might tremble at the 6 of what he is about to do
Together with another two scientists, he is publishing a paper which not only 7 that one group of humanity is more intelligent than the others, but explains the process that has brought this about
The group in 8 is a particular people originated from central Europe
The process is natural sele