中国科学技术大学课程资源
My Book House
Open Access Library (www.oalib.com) is an academic search engine and publisher. You can download research papers for free and submit your paper to it. It is a shared academic database.
超星免费接口,最大的中文PDF库
看典古籍
时光图书馆--经典珍藏图书、文章系列软件
52书库(www.52shuku.vip)分享各类好看的小说,包括但不限于:甜文宠文以及虐文等小说,均为全本完结的精彩小说,欢迎前来在线阅读,无弹窗广告哦~