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   44990篇
  免费   548篇
  国内免费   141篇
教育   32174篇
科学研究   4260篇
各国文化   339篇
体育   3949篇
综合类   30篇
文化理论   670篇
信息传播   4257篇
  2022年   252篇
  2021年   393篇
  2020年   620篇
  2019年   940篇
  2018年   3253篇
  2017年   3165篇
  2016年   2553篇
  2015年   815篇
  2014年   1068篇
  2013年   6390篇
  2012年   1130篇
  2011年   1581篇
  2010年   1498篇
  2009年   1121篇
  2008年   1363篇
  2007年   1783篇
  2006年   710篇
  2005年   956篇
  2004年   1182篇
  2003年   1061篇
  2002年   820篇
  2001年   849篇
  2000年   630篇
  1999年   505篇
  1998年   327篇
  1997年   324篇
  1996年   342篇
  1995年   343篇
  1994年   285篇
  1993年   285篇
  1992年   451篇
  1991年   409篇
  1990年   416篇
  1989年   433篇
  1988年   363篇
  1987年   416篇
  1986年   369篇
  1985年   418篇
  1984年   350篇
  1983年   328篇
  1982年   279篇
  1981年   238篇
  1980年   232篇
  1979年   384篇
  1978年   262篇
  1977年   230篇
  1976年   242篇
  1975年   204篇
  1974年   214篇
  1971年   197篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Cultural Studies of Science Education - The retention of underrepresented students remains a significant challenge in the STEM (Science, Technology, Engineering and Math) disciplines. A broad range...  相似文献   
12.
13.
14.
ABSTRACT

This article offers a textual analysis and semiotic reading of the Rich Kids of Tehran's (RKOT’s) Instagram page. Contributing to scholarship on Iranian youth media practices, this article interrogates how the RKOT navigate urban and rural space to engage in everyday processes of resistance against global and local systemic oppression. Grounding their visual representations on Instagram in historical and cultural context, the author questions how and when quotidian actions are transformed into political transgressions when posted on social media. This article emphasizes the RKOT's agency in shaping their brand by analyzing representations of gender performance, intertextuality, and national identity on Instagram.  相似文献   
15.
ABSTRACT

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and, especially, relative humidity (RH). Since the late nineteenth century, many studies have been carried out on the best way to control hygrothermal conditions. In old buildings located in maritime temperate climate zones (such as Portugal) with strong thermal inertia, and which have low ventilation rate (relative to the volume and number of visitors), daily and seasonal hygroscopic inertia may help to assure the maintenance of RH stabilization conditions. The use of expensive active systems may be minimized through the passive behaviour of internal finishing building materials. This work presents the results of an experimental laboratory study conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. Based in these results and in-situ monitoring in a museum housed in a building, located in Porto, with a typical construction of the 1950s (granite masonry and reinforced concrete slabs), a numerical analysis was done to quantify the influence of hygroscopic materials in stabilizing the interior relative humidity.  相似文献   
16.
ABSTRACT

This forum brings together food, (in)security, and communication. The authors participating in this forum center communication as both process and tool for understanding, mitigating, and making meaning of food (in)security. The nine authors together discuss the role of communication in food (in)security, the central challenges for scholars and practitioners working on food (in)security, and the creative possibilities and impacts influencing the future of food (in)security. The forum produces a call for applied scholars to re-imagine communication frameworks in order to make meaningful differences in their communities.  相似文献   
17.
ABSTRACT

This paper aims to analyse the initiatives undertaken by some immigrant communities residing in Latin America to record their mobilisation around the First World War. After the armistice, European communities in Argentina, Bolivia, Brazil, Chile, Mexico, Paraguay, Peru, Uruguay and other countries gathered detailed information about their activities during the conflict, published as profusely illustrated books of remembrance, offered to their governments as proof of their loyalty. The article intends to establish the peculiar nature of these publications as records of the war effort, and analyse the agents and processes of their elaboration, and their role as commemorative but also as archival documents.  相似文献   
18.
A significant number of archaeological finds of the 13th–16th century from the Tuscan sites of Germagnana and Gambassi in Valdelsa—FI, was studied by different physico-chemical investigations (SEM–EDS, ICP, Mössbauer spectroscopy, XRD, XRF, TG-DTA) in order to contribute to clarify the production methodology and the pre-industrial glass manufacture technology. The studied samples are mainly non-vitreous finds as production waste, refractory materials, crucibles and raw materials; also vitreous finds as frits, skims, glasses (glass masses, glass working waste and finished products) have been taken into consideration. The obtained petrographic and physico-chemical data strongly suggest that both Gambassi and Germagnana glass manufactures were strictly connected with the sources of vitrifiable materials, situated in Tuscan sand quarries. In particular a comparison between sands from the neighbouring quarries and appropriate finds of the two archaeological sites evidences that the employed vitrifiable materials possibly belong to La Casina La Cava resort. The archaeological classification, based on macroscopic observation and stratigraphic position, was compared and verified with the scientific classification of the examined finds of Germagnana and Gambassi sites based on their composition, morphology and physico-chemical properties.  相似文献   
19.
体育真义论   总被引:7,自引:0,他引:7  
首先对体育能够增强体质,祛病保健,益寿延年的传统信条提出质疑,通过对体育的基本属性和两大种差特点的分析,提出体育是旨在强化体能的非生产性人体活动这一新概念。  相似文献   
20.
论高校体育教学的创新与大学生负性情绪的调控   总被引:1,自引:0,他引:1  
关注学生的心理问题,是创新高校体育教学的又一核心问题。笔者拟透视“情绪”这一视角,来分析当前高校体育教学对大学生情绪的影响,以求切准大学生带有社会性的整体情绪状态,来创新高校体育教学,以实现大学生身、心、群的全面发展。  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