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   13123篇
  免费   123篇
  国内免费   8篇
教育   8950篇
科学研究   1627篇
各国文化   324篇
体育   826篇
综合类   5篇
文化理论   168篇
信息传播   1354篇
  2021年   90篇
  2020年   131篇
  2019年   191篇
  2018年   907篇
  2017年   932篇
  2016年   692篇
  2015年   197篇
  2014年   211篇
  2013年   1687篇
  2012年   271篇
  2011年   498篇
  2010年   453篇
  2009年   323篇
  2008年   430篇
  2007年   524篇
  2006年   185篇
  2005年   251篇
  2004年   319篇
  2003年   213篇
  2002年   146篇
  2001年   165篇
  2000年   200篇
  1999年   165篇
  1998年   93篇
  1997年   94篇
  1996年   82篇
  1995年   69篇
  1994年   74篇
  1993年   85篇
  1992年   147篇
  1991年   155篇
  1990年   155篇
  1989年   163篇
  1988年   127篇
  1987年   121篇
  1986年   125篇
  1985年   165篇
  1984年   132篇
  1983年   125篇
  1982年   100篇
  1981年   82篇
  1980年   96篇
  1979年   143篇
  1978年   101篇
  1977年   93篇
  1976年   82篇
  1974年   89篇
  1973年   74篇
  1971年   69篇
  1968年   67篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
This article considers the dynamics and specifics of training highly qualified scientific staff (philosophy doctors and doctors of sciences) in the field of information security and data protection in a 10-year period of 2004–2013 in basic research specialties as classified by the Higher Attestation Commission (VAC) of the Ministry of Education and Science of the Russian Federation.  相似文献   
72.
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   
73.
Editorial     
B. Sury 《Resonance》2017,22(5):431-432
  相似文献   
74.
75.
76.
77.
This article describes a study that aimed to answer the following question: ‘Will a programme of professional development in the area of special and inclusive education be effective in achieving attitudinal shift in teachers?’ Forty‐eight teachers who were enrolled on a Master's programme in Special and Inclusive Education were surveyed via a questionnaire at the beginning and end of a ten‐week introductory module. The results indicated overall attitudinal shift and attitudinal shift for four categories of inclusion to suggest more positive attitudes at the end of the module, compared with at the beginning. The implications for providers of pre‐ and in‐service education and training courses for teachers are discussed.  相似文献   
78.
ABSTRACT

The aim of the present study was to investigate the existence of a relative age effect (RAE) on physical fitness of preschoolers. Anthropometry and physical fitness were assessed in 3147 children (3–5 years old) using the PREFIT battery. Based on the birth year, participants were divided into 3year groups (3-, 4- and 5-years). Within each year group, 4quarter groups were created: quarter 1, preschoolers born from January to March; quarter 2, from April to June; quarter 3, from July to September; quarter 4, from October to December. The MANCOVA analysis revealed a main effect of year group (Wilks’ λ = 0.383; F10,5996 = 369.64; p < 0.001, ηp 2 = 0.381) and of quarter (Wilks’ λ = 0.874; F15,8276.6 = 27.67; p < 0.001; ηp 2 = 0.044) over the whole battery of tests. To the best of our knowledge, this is the first study to report the existence of RAE at the preschool stage. In general, performance improved as the relative age increased (i.e., those born in quarter 1 performed better than those in the other quarters). Individualization strategies should be addressed within the same academic year not only in elementary or secondary years but also in preschoolers.  相似文献   
79.
80.
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