精选优质文档-倾情为你奉上2015年考研英语一真题及答案详细解析2015年全国硕士研究生入学统一考试英语（一）试题及答案详细解析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 the ANSWER SHEET. (10 points)Though not biologically related, friends are as “related” as fourth cousins, sharing about 1% of genes. That is _(1)_a study, published from the University of California and Yale University in the Proceedings of the National Academy of Sciences, has_(2)_
