研究之门
www.researchgate.net
access+millionpublicationsandconnectwith+millionresearchers.joinforfreeandgainvisibilitybyuploadingyourresearch.
更新日期：2023-8-4 07:50 网站价值：0元 点击次数：612
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.
更新日期：2023-6-29 02:55 网站价值：0元 点击次数：103
万方数据知识服务平台-中外学术论文、中外标准、中外专利、科技成果、政策法规等科技文献的在线服务平台。
更新日期：2023-6-18 00:41 网站价值：0元 点击次数：125
First published in 1869, Nature is the world’s leading multidisciplinary science journal. Nature publishes the finest peer-reviewed research that drives ground-breaking discovery, and is read by thou ...
更新日期：2023-12-14 09:54 网站价值：0元 点击次数：105
