PDFGiant官网
PDFGiant:世界各国杂志免费下载分享网是一个提供是世界多国杂志的网站，并且提供免费的下载服务，杂志种类繁多，更新速度快，所提供的下载地址有三个，可以根据自己的网络来选择下载方式。More than 50 new additions daily. We are the best place to get PDF copies of your favourite magazines - hop in!
- 2015-10-25 - 收藏
ResearchGate官网
ResearchGATE是一个社交网络服务网站，于2008年5月上线。网站旨在推动全球范围内的科学合作，用户可以联系同行，了解研究动态，分享科研方法以及交流想法。Find over 80 million publications, 7 million researchers and 1 million answers to research questions. ResearchGate is a network dedicated to science and research. Connect, collaborate and discover scientific publications, jobs and conferences. All for free.
- 2015-10-06 - 收藏
Stuff.co.nz
Latest NZ news, world news, sport, weather forecasts, travel, entertainment, business, science, environment, politics and newspapers. Visit Stuff.co.nz.
- 2014-02-04 - 收藏
Welcome to the USGS - U.S. Geological Survey
Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment.
- 2014-02-04 - 收藏
Exploratorium
San Francisco's Exploratorium is more than a museum, it's a twenty-first-century learning laboratory, an eye-opening, always-changing, playful place to explore and tinker. Dive in and discover what we’re all about.
- 2014-02-04 - 收藏
EdxOnline教育平台www.edxonline.org
EdxOnline：免费在线教育平台是由MIT公司和哈佛远程教育合并创办的在线教育平台EDX，提供跨领域、高标准的免费课程、实验创新的教学技术。整个项目将接受一家非盈利组织的监督。EdX a non-profit created by Harvard and MIT brings the best of higher education to students of all ages anywhere in the world via the internet with free MOOCs.
- 2013-09-18 - 收藏