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中国人民大学2015年研究生入学统一考试英语(一)试题及答案
2015年研究生入学统一考试英语（一）试题及答案
Section 1 Use of English
Dloped a \"friendship score\" which can predict who will be your friend based on their genes.
The study 9 found that the genes for smell were something shared in friends but not genes for immunity. Why this similarity in olfactory genes is difficult to explain, for now. 10 , as the team suggests, it draws us to similar environments but there is more 11 it. There could be many mechanisms working in tandem that 12 us in choosing genetically similar friends 13 than \"functional kinship\" of being friends with 14 !
One of the remarkable findings of the study was that the similar genes seem to be evolving 15 than other genes. Studying this could help 16 why human evolution picked pace in the last 30,000 years, with social environment being a major 17 factor.
The findings do not simply corroborate people's 18 to befriend those of similar 19 backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to 20 that all subjects, friends and strangers were taken from the same population. The team also controlled the data to check ancestry of subjects.
1 A what B why C how D when
2 A defended B concluded C withdrawn D advised
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