1, knowledge imitation network (-ki.net/)
Imitation knowledge network is an excellent website that can completely replace HowNet.
First of all, the paper retrieval results of this website are basically consistent with HowNet, and each account of this website provides free paper download in the early stage. When your download time is over, you can use another mailbox to register another account. Of course, if you don't want to re-register your account, it's worth a try that this website provides one dollar to download papers at will.
2, love to the net (/)
Genuine China is a highly recommended website for searching and downloading genuine software, and it is also a very professional website for searching and downloading genuine software. It offers three parts: permanent free, limited time discount and limited time free. The permanent free section provides all kinds of free genuine software, and the limited-time discount and limited-time free section are limited-time activities to provide paid genuine software.
Support PC, Android, ios, Mac, UWP software, all software is genuine, there is nothing extra; The software it provides is also very comprehensive: network security transmission, hard disk partition drive, document conversion compression, backup recovery encryption, picture editing management, unloading cleaning optimization and so on.
It provides free software sections, as well as various activities of paid software, and the website will be updated frequently.
4. Hot Spring School (/#/)
More than 70,000 websites for free reading of genuine books in Tsinghua University are open within a limited time, and books tend to be more professional. 2. 16 You can browse before school starts, read for free without leaving home, and fight the epidemic with knowledge!
Wenquan School, based on the characteristic content of Tsinghua University Publishing House, aggregates the professional knowledge content of higher education, highlights the professional disciplines such as science, engineering, computer and management, introduces the knowledge map system, associates the content resources according to the knowledge points, and provides users with personalized professional knowledge services, including personalized search, subscription, recommendation, reading and learning of knowledge content, so as to facilitate communication and sharing among users.