1, China hownet, Wan Fang data

These two are the most commonly used in China, and everyone should know them. General schools have accounts for students to use.

2. Google Academic

It can search all kinds of resources at home and abroad, find reports, abstracts and quotations from one place, find complete papers through your library or on the Internet, and learn about important papers in any scientific research field.

Compared with other search engines, Google should be slightly better. This link has been inserted, and you can directly enter the search.

3、OALib

More than 4,265,438+09,598 open source papers covering all disciplines are provided. All articles can be downloaded for free. OALib Journal is a peer-reviewed academic journal, covering all fields of science, technology, medicine and humanities and social sciences. All articles published in OALib Journal are stored in OALib.

4. World Digital Library (WDL)

On the Internet, important raw materials from various cultures around the world are provided free of charge in multilingual form. Here you can learn about interesting history and culture around the world.

5. Online terminology

Sponsored by the National Science and Technology Terminology Examination Committee, it is positioned as a terminology knowledge service platform. It can search terms and accumulate more than 450,000 standard terms. Covering basic science, engineering and technical science, agricultural science, medicine, humanities and social sciences, military science and other fields 100.