The paper must have a table of contents, which is a brief table of the main paragraphs in the paper. The thesis consists of title, author, abstract, keywords, text, references and appendices, some of which (such as appendices) are dispensable.

In order to explore and master the writing rules and characteristics of papers, it is necessary to classify papers. Because the content and nature of the paper itself are different, the research fields, objects, methods and expressions are different, and the classification methods of the paper are also different.

Papers can be divided into theoretical papers, experimental papers, descriptive papers and design papers according to the nature of content and research methods. In addition, there is a comprehensive classification, which divides papers into four categories: thematic, argumentative, comprehensive and comprehensive.

Directory location:

The table of contents is usually placed in front of the text of the paper, so it is the guide map of the paper. To make the directory really play the role of a guide map, we must pay attention to:

1, accurate. The content must be consistent with the outline of the full text. In other words, the title, subtitle and content of this paper are one-to-one correspondence.

2, clear and correct. The table of contents should be marked with the page number of the table of contents one by one in the text. Page numbers must be clear and correct.

3. complete. Because the table of contents is the guide map of the paper, it must be complete. In other words, all the contents of the article should be reflected in the catalogue and must not be omitted.