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   3996篇
  免费   429篇
教育   3877篇
科学研究   33篇
各国文化   111篇
体育   59篇
综合类   2篇
文化理论   10篇
信息传播   333篇
  2023年   8篇
  2022年   7篇
  2021年   49篇
  2020年   66篇
  2019年   131篇
  2018年   171篇
  2017年   206篇
  2016年   153篇
  2015年   183篇
  2014年   201篇
  2013年   1248篇
  2012年   169篇
  2011年   179篇
  2010年   183篇
  2009年   149篇
  2008年   180篇
  2007年   120篇
  2006年   106篇
  2005年   111篇
  2004年   96篇
  2003年   44篇
  2002年   46篇
  2001年   50篇
  2000年   50篇
  1999年   48篇
  1998年   33篇
  1997年   27篇
  1996年   43篇
  1995年   42篇
  1994年   25篇
  1993年   26篇
  1992年   27篇
  1991年   27篇
  1990年   35篇
  1989年   17篇
  1988年   21篇
  1987年   19篇
  1986年   15篇
  1985年   14篇
  1984年   13篇
  1983年   13篇
  1982年   13篇
  1981年   6篇
  1980年   6篇
  1979年   6篇
  1978年   11篇
  1977年   4篇
  1975年   5篇
  1971年   5篇
  1969年   4篇
排序方式: 共有4425条查询结果,搜索用时 15 毫秒
1.
2.
The study examined the social‐information‐processing skills of kindergarten children with developmental learning disabilities (LD) utilizing Crick and Dodge's (1994) model of children's social adjustment as a theoretical framework. Participants consisted of 20 kindergarten children with developmental LD who attended three integrated kindergartens and 20 children without developmental LD from the same kindergartens. Participants were assessed on social‐information‐processing skills, feelings of loneliness, sense of coherence, and teachers' ratings of behavioral problems and positive resources. The results indicated that girls with developmental LD performed significantly lower on two information‐processing steps—the response decision and the enactment steps—than did girls without LD. Such differences were not found for boys. The results also showed that the social‐information‐processing skills of children with developmental LD were correlated with teachers' ratings.  相似文献   
3.
4.
The main concern of this paper is the decision making of young people from lower social class backgrounds about whether or not to participate in higher education. In the light of recent reforms of student funding and renewed efforts to widen participation in British higher education, an examination is made of the factors influencing the choices made by young people close to the time of making application for entry. Drawing on the findings of a research study undertaken in 2000 and conducted with recent and prospective undergraduate entrants, a contemporary perspective is offered on the issues facing different groups of young people from disadvantaged backgrounds. By way of conclusion, consideration is given to the need for improved information sources to guide young people in their decisions.  相似文献   
5.
6.
Review article     
Ducellier, A., Kaplan, M., Martin, Bernadette, avec la collaboration de Françoise Micheau. Le Moyen Âge en Orient. Byzance et l'Islam. Des Barbares aux Ottomans. Paris: Hachette Histoire Université, 1990.  相似文献   
7.
8.
An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  相似文献   
9.
10.
The paper examines e-government development in Africa. This study is based on the Cape Gateway project in South Africa, a leading e-government initiative on the continent. We observe that African countries have jumped on the e-government band wagon by looking mostly at the benefits without a clear risk assessment. We argue that African countries should question the pace and pathway for their e-government programs. We caution that e-government models from developed countries do not necessarily work in Africa. E-government programs in Africa should be balanced with the provision of basic needs and infrastructure. We conclude that e-government in South Africa should adopt multi-cultural approaches, and must be underpinned by national development priorities. We recommend that the Cape Gateway must address the socio-economic context and needs of the country. The pace and pathway of its e-government must depend on the availability of both financial and human resources and also user satisfaction.  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