15 After reading a good book, you can log on to Hefei Education Cloud Platform (certificate download) and directly query and print (query number, copy and paste number). Books are the main tools used by human beings to record all achievements. A book generally refers to a collection of paper bound into a book and printed with words. It is also an important medium for human beings to blend feelings, inherit knowledge and gain experience, which is of great significance to the development and inheritance of human civilization and an important tool for human beings to spread and record knowledge.

Tools for recording, analyzing, summarizing, organizing, discussing and explaining information, with or without illustrations, hard copy or paperback, with or without sleeves, including preface, introduction, catalogue and index, are devices for increasing knowledge, deepening understanding, promoting and educating the human brain. The device needs visual or tactile sensory forms to exist and use.