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   2842篇
  免费   54篇
  国内免费   3篇
教育   2238篇
科学研究   124篇
各国文化   31篇
体育   144篇
综合类   2篇
文化理论   15篇
信息传播   345篇
  2023年   16篇
  2022年   24篇
  2021年   34篇
  2020年   55篇
  2019年   104篇
  2018年   122篇
  2017年   125篇
  2016年   123篇
  2015年   54篇
  2014年   110篇
  2013年   635篇
  2012年   75篇
  2011年   88篇
  2010年   53篇
  2009年   63篇
  2008年   112篇
  2007年   77篇
  2006年   79篇
  2005年   55篇
  2004年   65篇
  2003年   55篇
  2002年   37篇
  2001年   36篇
  2000年   48篇
  1999年   42篇
  1998年   32篇
  1997年   35篇
  1996年   40篇
  1995年   41篇
  1994年   45篇
  1993年   28篇
  1992年   36篇
  1991年   21篇
  1990年   26篇
  1989年   20篇
  1988年   16篇
  1987年   12篇
  1986年   13篇
  1985年   16篇
  1984年   21篇
  1983年   16篇
  1982年   18篇
  1981年   20篇
  1980年   14篇
  1978年   10篇
  1976年   8篇
  1975年   10篇
  1970年   6篇
  1927年   6篇
  1923年   6篇
排序方式: 共有2899条查询结果,搜索用时 109 毫秒
121.
Children living in poverty are 1.3 times as likely as non‐poor children to experience reading difficulties and lack key oral experiences that contribute to early literacy development. The purpose of this research was to study the effects of viewing commercially available educational television with closed captions. Seventy second‐ and third‐grade economically disadvantaged children living in urban locations participated in this experimental research design. Children were randomly assigned to view videos with or without closed captions. Captions helped children recognise and read more words, identify the meaning of those words, generate inferences regarding programme content and transfer these skills to a normative code‐related skill task. Risk status moderated word recognition performance: those at risk benefited from captions while those who were not at risk recognised more words when captions were absent.  相似文献   
122.
A learning strategies program emphasizing primary (text-oriented), and support (affective) strategies was evaluated. Participants were given training in one of two sequences: primary-support or support-primary. A no-treatment group served as a control. In general, the results revealed that strategy training significantly improved performance on both text-processing and self-report measures. The primary-support group typically scored higher than the support-primary group on the text-processing measures. Conversely, the support-primary group reported more positive responses on the self-report measures. Long-term follow-up results are also presented.  相似文献   
123.
This study evaluates the use of full-text databases amongst 425 undergraduate and graduate students in western New York. A review of literature implicated convenience, time issues, article retrieval option knowledge, and the appreciation and understanding of research article quality as potential predictors of full-text reliance. These variables were then evaluated via survey response and frequency counts, by conducting correlations, a one-way ANOVA, and stepwise regression analyses. The findings suggested that convenience, appreciation and understanding of research quality, and time management issues played a significant role in the prediction of student full-text reliance. These findings as well as the relationships among independent variables are discussed. Implications for instruction are then addressed.  相似文献   
124.
125.
126.
127.
128.
129.
Different methods of ball carrying can be used when a player runs with the ball in rugby union. We examined how three methods of ball carrying influenced sprinting speed: using both hands, under the left arm and under the right arm. These methods were compared with running without the ball. Our aim was to determine which method of ball carrying optimizes sprinting speed. Altogether, 48 rugby union players (age 21 +/- 2 years, height 1.83 +/- 0.1 m, body mass 85.3 +/- 12 kg, body fat 14 +/- 5%; mean +/- s) were recruited. The players performed twelve 30-m sprints in total (each player performed three trials under each of three methods of carrying the ball and sprinting without the ball). The design of the study was a form of Latin rectangle, balanced across the trial order for each of the methods and for pairwise combinations of the methods in blocks of four per trial. Each sprint consisted of a 10-m rolling start, followed by a 20-m timed section using electronic timing gates. Compared with sprinting 20 m without the ball (2.58 +/- 0.16 s), using both hands (2.62 +/- 0.16 s) led to a significantly slower time (P < 0.05). Sprinting 20 m with the ball under the left arm (2.61 +/- 0.15 s) or under the right arm (2.60 +/- 0.17 s) was significantly quicker than when using 'both hands' (P < 0.05), and both these methods were significantly slower than when running without the ball (P < 0.05). Accordingly, running with the ball in both hands led to the greatest decrement in sprinting performance, although carrying the ball under one arm also reduced the players' sprinting ability. Our results indicate that to gain a speed advantage players should carry the ball under one arm.  相似文献   
130.
The widespread use of handheld computers and other mobile devices in the healthcare environment and their potential for providing access to information has prompted health sciences librarians everywhere to learn more about this technology. Early in 2001, the Health Sciences Library (HSL) at the University of North Carolina at Chapel Hill began exploring ways to support mobile computing. This paper describes the four basic approaches taken by the librarians that helped establish the HSL as a leader in the area of mobile technologies.  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