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　　>>>拓展阅读：手把手教你六步搞定雅思阅读长难句分析

　　● 题目：

　　Since the aim of archaeology is the understanding of humankind, it is a humanistic study, and since it deals with the human past, it is a historical discipline. (剑4, test4 passage 2)

　　● 分析：

　　本句为并列句，由and连接，句子“Since the aim of archaeology is the understanding of humankind, it is a humanistic study”和句子“since it deals with the human past, it is a historical discipline.”并列;句子“Since the aim of archaeology is the understanding of humankind, it is a humanistic study”中主句为“it is a humanistic study”, “Since the aim of archaeology is the understanding of humankind”为since引导的原因状语从句;句子“since it deals with the human past, it is a historical discipline”中主句为“it is a historical discipline”, “since it deals with the human past”为since引导的原因状语从句。