2015年全国硕士研究生入学试英语一试题及参考答案点评2015年全国硕士研究生入学考试英语一试题及参考答案点评.docVIP

2015年全国硕士研究生入学考试英语(课程)一试题 Section I Use of English Directions: Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 points) We have more genes in common with people we pick to be our friends than with strangers. Though not biologically related, friends are as related as fourth cousins, sharing about 1% of genes. That is 1 a study publishedfrom the University of California and Yale University in theProceedings of the National Academy of Sciences, has 2 . The study is a genome-wide analysis conducted 3 1932 unique subjects which 4 pairs of unrelated friends and unrelated strangers. The same people were used in both 5. While 1% may seem 6 , it is not so to a geneticist. As co-author of the study James Fowler, professor of medical genetics at UC San Diego says, Most people do not even 7their fourth cousins but somehow manage to select as friends the people who 8 our kin. The team 9 developed a friendship score which can predict who will be your friend based on their genes. The study also 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 11similar environments but there is more to it. There could be many mechanisms working in tandem that 12us in choosing genetically similar friends 13 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 peoples 18to befriend those of similar et 19 backgrounds, say the researchers. Though all the subjects were drawn from a population of European extraction, care was taken to 20that all subjects, friends and strangers were tak