Keywords are selected from the title, abstract and text of the paper, which are words with substantial meaning to express the central content of the paper.

Keywords are words used by computer system to index the content characteristics of papers, which is convenient for information system to collect and provide readers with retrieval.

Generally, 3-8 words are selected as keywords for each paper, and a new line is set at the bottom left of the "abstract". Subject words are standardized.

When determining the subject words, we should analyze the theme of the paper and convert it into the rules in the thesaurus according to the rules of indexing and collocation.

Demonstration words. (See Chinese Thesaurus and World Chinese Thesaurus). Whether domestic or foreign newspapers, tube

The selection of keywords follows certain norms, which are words selected from papers to meet the needs of document indexing or retrieval.

Or phrases. Keywords include subject words and free words: subject words are extracted from natural language and used for document indexing or retrieval.

Words or phrases selected and standardized from the main vocabulary; Free words are not standardized, that is, they are not included in the lexicon.

A word or phrase. Hello, I hope we can help you. Relevant information can be found on HowNet and World Wide Web. I can't write a paper, at most.

The key is to keep a correct attitude, step by step, read more model essays and see how others write. Music professional papers are our characteristics.

Dragon, our service features: support Alipay transactions and ensure the safety of your funds. Three service modes, multiple comments and multiple guarantees.

Prove the quality of the article. Attached is a plagiarism detection report for your safe use. Infinite revisions, even the teacher who is making things difficult can pass.