가장 인기 있는 상위 100위 참고 자료 웹사이트
새로운 탑을 만나보세요 참고 자료 순위, 트래픽 및 참여를 기반으로 한 전 세계 웹사이트 ~와 같은 zhihu, quora 또는 sciencedirect.
Access 130+ million publications and connect with 20+ million researchers. Join for free and gain visibility by uploading your research.
豆丁网是面向全球的中文社会化阅读分享平台,拥有商业,教育,研究报告,行业资料,学术论文,认证考试,星座,心理学等数亿实用文档和书刊杂志。
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Wikimedia is a global movement whose mission is to bring free educational content to the world.
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道客巴巴(doc88.com)是一个在线文档分享平台。你可以上传学术论文,研究报告,行业标准,课后答案,教学课件,工作总结,作文等电子文档,可以自由交换文档,还可以分享最新的行业资讯。
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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 thought-leaders and decision-makers around the world.
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The dictionary by Merriam-Webster is America's most trusted online dictionary for English word definitions, meanings, and pronunciation. #wordsmatter
Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.