文档介绍：开封海天考研:先上课考上再交费开封海天考研信息平台:htww********** 开封海天考研微博:KF—海天考研 1 2015 年全国硕士研究生入学统一考试英语一试题 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) Though not biologically related, friends are as "related" as fourth cousins, sharing about 1% of genes. That is1a study published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has 2. The study isa 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 toa icist. As James Fowler, professor of medical ics at UC San Diego, says, "Most people do not even 7 their fourth cousins but somehow manage to select as friends the people who 8 our kin." 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 Perhaps, 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 ically 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. Section II prehension? 1 、_____ 正确答案是: A 开封海天考研:先上课考上