文献综述是对某一学科、专业或专题的大量文献进行整理筛选、分析研究和综合提炼而成的一种学术论文，是高度浓缩的文献产品。根据其涉及的内容范围不同，综述可分为综合性综述和专题性综述两种类型。所谓综合性综述是以一个学科或专业为对象，而专题性综述则是以一个论题为对象的。学生毕业论文主要为专题性综述。-Literature Review of a particular subject, or topic at the professional literature to collate the large screen, Analysis and synthesis derived an academic, is a highly concentrated product literature. According to the contents of its scope, can be summarized into a comprehensive summary and thematic overview of two types. The so-called comprehensive overview is based on an academic or professional targets, and thematic overview is based on a topic targets. Theses major overview of the topic.