全文获取类型
收费全文 | 27716篇 |
免费 | 376篇 |
国内免费 | 19篇 |
专业分类
教育 | 19775篇 |
科学研究 | 2210篇 |
各国文化 | 357篇 |
体育 | 2547篇 |
综合类 | 10篇 |
文化理论 | 266篇 |
信息传播 | 2946篇 |
出版年
2021年 | 265篇 |
2020年 | 401篇 |
2019年 | 615篇 |
2018年 | 809篇 |
2017年 | 804篇 |
2016年 | 778篇 |
2015年 | 488篇 |
2014年 | 622篇 |
2013年 | 5485篇 |
2012年 | 585篇 |
2011年 | 620篇 |
2010年 | 480篇 |
2009年 | 538篇 |
2008年 | 585篇 |
2007年 | 550篇 |
2006年 | 511篇 |
2005年 | 456篇 |
2004年 | 484篇 |
2003年 | 397篇 |
2002年 | 404篇 |
2001年 | 513篇 |
2000年 | 573篇 |
1999年 | 485篇 |
1998年 | 311篇 |
1997年 | 304篇 |
1996年 | 362篇 |
1995年 | 297篇 |
1994年 | 319篇 |
1993年 | 274篇 |
1992年 | 406篇 |
1991年 | 436篇 |
1990年 | 403篇 |
1989年 | 421篇 |
1988年 | 357篇 |
1987年 | 349篇 |
1986年 | 362篇 |
1985年 | 381篇 |
1984年 | 323篇 |
1983年 | 328篇 |
1982年 | 260篇 |
1981年 | 258篇 |
1980年 | 268篇 |
1979年 | 364篇 |
1978年 | 288篇 |
1977年 | 255篇 |
1976年 | 225篇 |
1975年 | 202篇 |
1974年 | 191篇 |
1973年 | 200篇 |
1971年 | 173篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
S Grant T Hasler C Davies T C Aitchison J Wilson A Whittaker 《Journal of sports sciences》2001,19(7):499-505
There is limited information on the anthropometry, strength, endurance and flexibility of female rock climbers. The aim of this study was to compare these characteristics in three groups of females: Group 1 comprised 10 elite climbers aged 31.3 +/- 5.0 years (mean +/- s) who had led to a standard of 'hard very severe'; Group 2 consisted of 10 recreational climbers aged 24.1 +/- 4.0 years who had led to a standard of 'severe'; and Group 3 comprised 10 physically active individuals aged 28.5 +/- 5.0 years who had not previously rock-climbed. The tests included finger strength (grip strength, finger strength measured on climbing-specific apparatus), flexibility, bent arm hang and pull-ups. Regression procedures (analysis of covariance) were used to examine the influence of body mass, leg length, height and age. For finger strength, the elite climbers recorded significantly higher values (P < 0.05) than the recreational climbers and non-climbers (four fingers, right hand: elite 321 +/- 18 N, recreational 251 +/- 14 N, non-climbers 256 +/- 15 N; four fingers, left hand: elite 307 +/- 14 N, recreational 248 +/- 12 N, non-climbers 243 +/- 11 N). For grip strength of the right hand, the elite climbers recorded significantly higher values than the recreational climbers only (elite 338 +/- 12 N, recreational 289 +/- 10 N, non-climbers 307 +/- 11 N). The results suggest that elite climbers have greater finger strength than recreational climbers and non-climbers. 相似文献
53.
54.
55.
56.
The relationship between peak height velocity and physical performance in youth soccer players 总被引:1,自引:1,他引:0
Philippaerts RM Vaeyens R Janssens M Van Renterghem B Matthys D Craen R Bourgois J Vrijens J Beunen G Malina RM 《Journal of sports sciences》2006,24(3):221-230
Longitudinal changes in height, weight and physical performance were studied in 33 Flemish male youth soccer players from the Ghent Youth Soccer Project. The players' ages at the start of the study ranged from 10.4 to 13.7 years, with a mean age of 12.2 +/- 0.7 years. Longitudinal changes were studied over a 5 year period. Peak height velocity and peak weight velocity were determined using non-smoothed polynomials. The estimations of peak height velocity, peak weight velocity and age at peak height velocity were 9.7 +/- 1.5 cm x year-1, 8.4 +/- 3.0 kg x year-1 and 13.8 +/- 0.8 years, respectively. Peak weight velocity occurred, on average, at the same age as peak height velocity. Balance, speed of limb movement, trunk strength, upper-body muscular endurance, explosive strength, running speed and agility, cardiorespiratory endurance and anaerobic capacity showed peak development at peak height velocity. A plateau in the velocity curves was observed after peak height velocity for upper-body muscular endurance, explosive strength and running speed. Flexibility exhibited peak development during the tear after peak height velocity. Trainers and coaches should be aware of the individual characteristics of the adolescent growth spurt and the training load should also be individualized at this time. 相似文献
57.
This article discusses the changing relationships of authors and publishers, the current trends and challenges they face, and the direction of these relationships in the future. As the STM publishing industry finds itself in the midst of significant technological and economic changes, this article provides background to these changes and looks at the key elements, including open access business development, institutional repository trends, and emerging public financing policies in the future. 相似文献
58.
59.
60.
PETER J. ARNOLD 《Journal of Philosophy of Education》1992,26(2):237-255
ABSTRACT It is argued that sport, like science or medicine, is a valued human practice and is characterised as much by the moral manner in which its participants conduct themselves as by the pursuit of its own skills, standards and excellences. Virtues, such as justice, honesty and courage, are not only necessary to pursue its goals but to protect it from being corrupted by external interests. After explicating the practice view of sport in contrast to the sociological view, the nature of competition in sport is discussed before examining two related issues: winning at all costs and the taking of performance-enhancing drugs. The importance of practices to education and the good life is also outlined. 相似文献