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   5183篇
  免费   398篇
  国内免费   5篇
教育   4559篇
科学研究   165篇
各国文化   122篇
体育   213篇
综合类   3篇
文化理论   43篇
信息传播   481篇
  2023年   13篇
  2022年   23篇
  2021年   74篇
  2020年   95篇
  2019年   179篇
  2018年   216篇
  2017年   249篇
  2016年   202篇
  2015年   220篇
  2014年   251篇
  2013年   1399篇
  2012年   215篇
  2011年   227篇
  2010年   218篇
  2009年   188篇
  2008年   213篇
  2007年   170篇
  2006年   144篇
  2005年   140篇
  2004年   133篇
  2003年   80篇
  2002年   75篇
  2001年   70篇
  2000年   63篇
  1999年   60篇
  1998年   50篇
  1997年   33篇
  1996年   48篇
  1995年   48篇
  1994年   35篇
  1993年   27篇
  1992年   24篇
  1991年   39篇
  1990年   42篇
  1989年   24篇
  1988年   26篇
  1987年   32篇
  1986年   19篇
  1985年   33篇
  1984年   20篇
  1983年   17篇
  1982年   20篇
  1981年   14篇
  1980年   8篇
  1979年   8篇
  1978年   10篇
  1977年   8篇
  1976年   10篇
  1975年   8篇
  1972年   9篇
排序方式: 共有5586条查询结果,搜索用时 8 毫秒
221.
222.
Libraries have been the key to preserving culture and historic legacy for centuries. One such treasure cataloged in The Pennsylvania State University (Penn State) Libraries is a collection of over 33,000 Sanborn? Fire Insurance Maps. Originally kept safe in metal drawers, the library has embarked on a journey to digitize this abundance of information, combine it with other media such as photographs, and make it accessible through a web interface. Inspired by these efforts, we accessed this information and took it to the next level. Using state of the art 3D modeling and immersive technologies, we created a historic 3D model and immersive experiences of Penn State, exemplarily for the 1922 campus. The resulting experiences can be accessed through the web but also through head mounted displays (HMDs) and mobile phones in combination with VR viewers such as the Google Cardboard. Additionally, they can be used anywhere in the world or on the campus itself as a way to enable remote and in situ experiences and learning. Immersive experiences let us connect to the past, the present and the future, and as such offer value to digital cultural heritage efforts.  相似文献   
223.
The current work examines children's sensitivity to rime unit spelling–sound correspondences within the context of early word reading as a way of assessing word‐specific influences on early word‐reading strategies. Sixty 6–7‐year‐olds participated in an experimental reading task that comprised word items that shared either frequent or infrequent rime unit correspondences. Retrospective self‐reports were taken as measures of strategy choice. The results showed that the children were more accurate in identifying word items that shared a common rime unit (consistent items) when compared with those containing infrequent rime units (unique and exception items). Moreover, while nonlexical (phonological) attempts were most frequently applied across all word types, these resulted in lower levels of accuracy, especially for the exception word items. The current data support the argument that children are increasingly sensitive to rime unit sound–spelling correspondences during the early stages of their word reading and the nature of these word‐specific orthographic representations shape their reliance on using particular lexical or non‐lexical‐based word‐reading strategies.  相似文献   
224.
This chapter first presents a review of research on the development of adopted children, focusing on meta‐analytic evidence and highlighting comparisons between adopted children with and without histories of early adversity. Some methodological issues arising from this literature are considered as well. Second, 7 longitudinal studies of adopted children's development are described, and the convergence of findings across the longitudinal studies and with the cross‐sectionally based meta‐analytic evidence is discussed. Third, the role of the adoptive family in supporting adopted children's development is explored.  相似文献   
225.
226.
This study examined to what extent adolescents’ and their friends’ risk behaviors (i.e., delinquency and alcohol use) hinder or promote their academic achievement (grade point average [GPA]), and vice versa. Longitudinal data were used (= 1,219 seventh- to ninth-grade adolescents; Mage = 13.69). Results showed that risk behaviors negatively affected adolescents’ GPA, whereas GPA protected against engaging in risk behaviors. Moreover, adolescents tended to select friends who have similar behaviors and friends’ behaviors became more similar over time (same-behavior selection and influence). Furthermore, although same-behavior effects seemed to dominate, evidence was found for some cross-behavior selection effects and a tendency in seventh grade for cross-behavior influence effects. Concluding, it is important to investigate the interplay between different behaviors with longitudinal social network analysis.  相似文献   
227.
Two groups of gifted adolescents solved two similar intelligence tests with differing levels of task difficulty in reverse order. Under both conditions the performance level on the less complex test was much lower, a result not observed in a control group of average intelligence. Behavioural observations revealed that the low performance of the gifted students was combined with lack of effort. This performance pattern is discussed with respect to recent postulates of achievement motivation theory, which empasize the impact not only of the achievement motive, but also of the informational value of a given task for evaluating own level of ability. It is argued that the perceived informational value of the easier test was not high enough to create an incentive for the gifted students to perform at the highest possible level  相似文献   
228.
229.
The origins of the University Grants Committee   总被引:2,自引:0,他引:2  
Eric Hutchinson 《Minerva》1975,13(4):583-620
  相似文献   
230.
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