1, the characteristics of books and documents are obvious single independence: each book usually has its own separate and distinctive title, with a clear and concentrated theme and independent and complete content;

2. Compared with books, periodical literature has the characteristics of timely reporting, short publishing period, fast publishing speed, large quantity, novel content, wide distribution and great influence, which can timely reflect the new achievements, new levels and new trends of science and technology at home and abroad;

Books and documents

Periodical literature

Extended data:

Book introduction:

Books are the main tools used by human beings to record all their achievements, and also the important media for human beings to blend their feelings, acquire knowledge and inherit their experiences, which has made great contributions to the development of human civilization. At all times, people always give the highest affirmation and special care to books.

The operating benefit of China book industry is relatively stable, with gross profit margin ranging from 15% to 16% and sales profit margin ranging from 12% to 14%. However, compared with other industries, the return on investment in this industry is not ideal, with the return on total assets less than 6% and the return on net assets less than 8%. Fortunately, these two indicators are fluctuating and rising.

Baidu encyclopedia-books

Baidu encyclopedia-periodical