1, the open access library (OALib) webpage link OALib has more than 4 million articles, among which? Mathematics, chemistry, computer, humanities, engineering, biology, materials, medicine and humanities. All papers are free to download. One of the great advantages of this website is that it can be previewed directly online, and key information such as title, author and abstract can be previewed without downloading, saving a lot of time.

2、? FindaRticles links to an academic website with high value and simple operation. This website contains more than100000 documents. Which covers? Art and entertainment, automobile, business and finance, computer and technology, health and fitness, news and society, science education, sports and other aspects? Most of them are free!

3. The links on the iDataWeb page are similar to HowNet pages, but the completely different IdataWeb pages are free websites (limited in number), and you can directly search for keywords. Then what? Download/online preview.

4. The Google Academic Web page links to the Google Web application that searches academic articles for free!

5, SCI-HUB webpage link This is a magical website, you can download documents for free, and you can also download PDF format for free! Almost all Daniel who do scientific research know this hard-core platform. ? And there are three domain names, update the available addresses in real time!

6、? Library Genesis Web page links Library Genesis claims to help all mankind spread knowledge, without copyright. There are many papers on the website, which are easy to download, and there are many more? Foreign and Chinese documents are updated almost every day. What does its database contain? There are an amazing number of books and scientific papers. If you are interested, you can search for it yourself and you will find that this website is as hard as its name!