【答案解析】人类学是一门社会科学。社会科学是知识探索的一个分支，它力图像自然科学家研究自然现象那样，用理性的、有序的、系统的和冷静的方式研究人类及其行为。社会科学的学科包括地理学、经济学、政治学、心理学和社会学等等。每一门社会科学的学科都有一个分支或专业特别接近人类学。 [解析] (1)首句为简单句。
(2)第二句“Social science is that branch of intellectual enquiry which seeks to study humans and their endeavors in the same reasoned, orderly, systematic, and dispassionate manner that natural scientists use for the study of natural phenomena.”的主要构架为Social science is that branch... enquiry which ...that...(此句为带有两个定语从句的主从复合句。主句为Social science is that branch of intellectual enquiry。第一个定语从句“which seeks to study humans and their endeavors in the same reasoned，orderly, systematic, and dispassionate manner”修饰前面的enquiry。第二个定语从句that natural scientists use for the studv of natural phenomena修饰其前面的manner。)