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   26090篇
  免费   374篇
  国内免费   16篇
教育   18670篇
科学研究   2063篇
各国文化   275篇
体育   2640篇
综合类   8篇
文化理论   269篇
信息传播   2555篇
  2021年   299篇
  2020年   466篇
  2019年   705篇
  2018年   939篇
  2017年   875篇
  2016年   808篇
  2015年   505篇
  2014年   619篇
  2013年   4811篇
  2012年   591篇
  2011年   607篇
  2010年   474篇
  2009年   503篇
  2008年   528篇
  2007年   489篇
  2006年   468篇
  2005年   402篇
  2004年   419篇
  2003年   343篇
  2002年   352篇
  2001年   479篇
  2000年   522篇
  1999年   454篇
  1998年   276篇
  1997年   262篇
  1996年   329篇
  1995年   262篇
  1994年   278篇
  1993年   238篇
  1992年   357篇
  1991年   382篇
  1990年   351篇
  1989年   383篇
  1988年   353篇
  1987年   338篇
  1986年   331篇
  1985年   375篇
  1984年   300篇
  1983年   309篇
  1982年   247篇
  1981年   257篇
  1980年   266篇
  1979年   358篇
  1978年   264篇
  1977年   244篇
  1976年   206篇
  1975年   189篇
  1974年   188篇
  1973年   178篇
  1971年   178篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
51.
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   
52.
Medicine has made increasing use of meta-analysis, largely as a quantitative procedure for combining results of clinical trials. Meta-analysis begins with a comprehensive review of the literature. The next step is a systematic analysis of the quality and content of each study. Finally, results are combined statistically and conclusions are drawn from this new overview of the data. This paper presents a brief historical perspective on the use of meta-analysis in medicine with emphasis on the medical library. The authors conclude that in the future, medical librarians will play a significant role in the application of this useful technique.  相似文献   
53.
This investigation was undertaken in an effort to establish physiological characteristics of soccer players and to relate them to positional roles. A total of 135 footballers (age 24.4 +/- 4.6 years) were assessed for body mass, % body fat, haemoglobin, maximal oxygen uptake (VO2 max), leg power, anaerobic capacity and speed prior to an English league season. The sample included 13 goalkeepers, 22 full-backs, 24 centre-backs, 35 midfield players and 41 forwards. The goalkeepers were significantly heavier (86.1 +/- 5.5 kg; P < 0.01) than all groups except the centre-backs, had significantly higher estimated body fat percentages than centre-backs, forwards, midfield players (P < 0.01) or full-backs (P < 0.05), significantly lower estimated VO2 max values (56.4 +/- 3.9 ml kg-1 min-1; P < 0.01) and were slowest over 60 m (12.71 +/- 0.42 s). The midfield players had the highest predicted VO2 max values (61.4 +/- 3.4 ml kg-1 min-1), this being significantly greater (P < 0.05) than for the centre-backs. The forwards were the fastest group over 60 m (12.19 +/- 0.30 s), being significantly quicker than goalkeepers or centre-backs (P < 0.01) and full-backs (P < 0.05). Anaerobic power, as well as knee extensor torques (corrected for body mass) and extensor-flexor ratios, were similar between groups. No difference in estimated body fat percentage was observed between any of the outfield players, and haemoglobin concentrations were similar among players of all positions.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
54.
Buxton  William J. 《Minerva》2003,41(2):133-153
John Marshall is best remembered asthe first resident director of the RockefellerFoundation's Study and Conference Center atBellagio. Yet, his influence on knowledge,thought, and practice rivalled that of any ofhis contemporaries at the Rockefeller. Thispaper describes how he `went about hisbusiness' as a Foundation officer, and examineshis contribution to the creation of atransatlantic community of like-mindedtheorists and practitioners of communications.  相似文献   
55.
56.
57.
A case presentation method of group supervision, as practiced at a community college, is described. Developmental principles underlying this approach are presented.  相似文献   
58.
59.
60.
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