首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   23911篇
  免费   337篇
  国内免费   14篇
教育   16960篇
科学研究   1989篇
各国文化   255篇
体育   2370篇
综合类   7篇
文化理论   228篇
信息传播   2453篇
  2021年   247篇
  2020年   379篇
  2019年   561篇
  2018年   762篇
  2017年   693篇
  2016年   691篇
  2015年   418篇
  2014年   552篇
  2013年   4329篇
  2012年   512篇
  2011年   560篇
  2010年   424篇
  2009年   446篇
  2008年   483篇
  2007年   450篇
  2006年   429篇
  2005年   361篇
  2004年   392篇
  2003年   309篇
  2002年   327篇
  2001年   464篇
  2000年   508篇
  1999年   437篇
  1998年   258篇
  1997年   249篇
  1996年   308篇
  1995年   246篇
  1994年   260篇
  1993年   221篇
  1992年   350篇
  1991年   367篇
  1990年   340篇
  1989年   365篇
  1988年   336篇
  1987年   325篇
  1986年   325篇
  1985年   372篇
  1984年   293篇
  1983年   305篇
  1982年   239篇
  1981年   246篇
  1980年   259篇
  1979年   349篇
  1978年   259篇
  1977年   238篇
  1976年   201篇
  1975年   181篇
  1974年   182篇
  1973年   176篇
  1971年   174篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
143.
144.
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks.  相似文献   
145.
146.
147.
148.
Robert J. Lake 《Sport in Society》2017,20(11):1745-1764
Tim Henman was inarguably the best English player, and the most popular and socially significant British player, since Fred Perry. Throughout his career, media constructions of him fluctuated from being heralded as a potential Wimbledon champion, to a weak, underachieving perennial loser. Throughout his career, and despite the constant transition of dominant narratives, Henman’s quintessential ‘Englishness’ remained a key component, expressed through his image, appearance, ostensible personality/character and playing style. His ‘Englishness’ was especially apparent against the backdrop of the Wimbledon Championships, which used Henman’s success in its marketing of ‘tennis in an English garden’. This paper assesses the shifting meanings behind, and values of, Henman’s sustained image, and examines how changes in the narratives of Henman as a player reflected broader shifts in English identity. It is argued that Henman played a significant role in how Englishness was constructed, both in Britain and abroad, during the 1990s and 2000s.  相似文献   
149.
This article deals with the first years of foundation of the private Deutsche Hochschule für Leibesübungen (DHfL). It focuses on the question of why August Bier’s application for a Doktor der Leibesübungen in 1920 was refused. In the same year the DHfL also made an application for the education in state-run schools which was already task of the state-run Preußische Landesturnanstalt at Spandau. As the DHfL combined this application with its insistence on its autonomous status an application for a Doktor der Leibesübungen had implied financial, conceptual and institutional obligations for Prussia and at the same time a renuncitation of its sovereign rights. This thesis was proved by a comparison between the doctorate in physical education and the doctorate for businessmen at Cologne University.  相似文献   
150.
Families immigrating to Australia face many challenges integrating into the educational system, including language barriers and interrupted schooling. We have qualitatively evaluated the educational concerns of Arabic migrants from Sudan and Iraq to Melbourne, Victoria, Australia, a city that receives a high percentage of Australia's immigrants. Using an interactive paradigm incorporating focus group discussions for thematic analysis, we concluded that the parents’ frame of reference for education was a more didactic style of learning. Parents viewed education as an essential part of the way forward for their children in Australia. However, it was stressful for them to try to cope with a new host nation's expectation of their involvement in their children's education while at the same time dealing with a language barrier. Professionals should look to empower parents with structural information about the key elements of the educational curriculum with minimal reliance on written technical language and match their expectations of parental involvement to the situation of the parents.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号