全文获取类型
| 收费全文 | 1260篇 |
| 免费 | 23篇 |
| 国内免费 | 1篇 |
专业分类
| 教育 | 925篇 |
| 科学研究 | 101篇 |
| 各国文化 | 19篇 |
| 体育 | 98篇 |
| 综合类 | 1篇 |
| 文化理论 | 11篇 |
| 信息传播 | 129篇 |
出版年
| 2022年 | 12篇 |
| 2021年 | 19篇 |
| 2020年 | 31篇 |
| 2019年 | 42篇 |
| 2018年 | 58篇 |
| 2017年 | 54篇 |
| 2016年 | 55篇 |
| 2015年 | 20篇 |
| 2014年 | 32篇 |
| 2013年 | 256篇 |
| 2012年 | 30篇 |
| 2011年 | 37篇 |
| 2010年 | 23篇 |
| 2009年 | 23篇 |
| 2008年 | 32篇 |
| 2007年 | 27篇 |
| 2006年 | 29篇 |
| 2005年 | 15篇 |
| 2004年 | 25篇 |
| 2003年 | 17篇 |
| 2002年 | 15篇 |
| 2001年 | 12篇 |
| 2000年 | 24篇 |
| 1999年 | 19篇 |
| 1998年 | 11篇 |
| 1997年 | 15篇 |
| 1996年 | 15篇 |
| 1995年 | 20篇 |
| 1994年 | 20篇 |
| 1993年 | 12篇 |
| 1992年 | 18篇 |
| 1991年 | 15篇 |
| 1990年 | 16篇 |
| 1989年 | 11篇 |
| 1988年 | 7篇 |
| 1987年 | 6篇 |
| 1986年 | 8篇 |
| 1985年 | 12篇 |
| 1984年 | 14篇 |
| 1983年 | 12篇 |
| 1982年 | 11篇 |
| 1981年 | 14篇 |
| 1980年 | 8篇 |
| 1978年 | 9篇 |
| 1976年 | 8篇 |
| 1975年 | 7篇 |
| 1972年 | 5篇 |
| 1927年 | 6篇 |
| 1923年 | 6篇 |
| 1921年 | 4篇 |
排序方式： 共有1284条查询结果，搜索用时 15 毫秒
51.
Deborah Linebarger Jessica Taylor Piotrowski Charles R. Greenwood 《Journal of Research in Reading》2010,33(2):148-167
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
52.
53.
54.
55.
Grant SJ Oommen G McColl G Taylor J Watkins L Friel N Watt I McLean D 《Journal of sports sciences》2003,21(12):1009-1015
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
56.
57.
58.
59.
60.