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   15464篇
  免费   186篇
  国内免费   11篇
教育   10583篇
科学研究   2014篇
各国文化   120篇
体育   1055篇
综合类   5篇
文化理论   102篇
信息传播   1782篇
  2021年   160篇
  2020年   210篇
  2019年   311篇
  2018年   475篇
  2017年   420篇
  2016年   406篇
  2015年   250篇
  2014年   389篇
  2013年   2676篇
  2012年   333篇
  2011年   364篇
  2010年   320篇
  2009年   288篇
  2008年   347篇
  2007年   288篇
  2006年   280篇
  2005年   250篇
  2004年   287篇
  2003年   207篇
  2002年   214篇
  2001年   308篇
  2000年   302篇
  1999年   275篇
  1998年   160篇
  1997年   192篇
  1996年   182篇
  1995年   133篇
  1994年   147篇
  1993年   149篇
  1992年   262篇
  1991年   230篇
  1990年   216篇
  1989年   231篇
  1988年   207篇
  1987年   194篇
  1986年   194篇
  1985年   203篇
  1984年   167篇
  1983年   184篇
  1982年   153篇
  1981年   144篇
  1980年   135篇
  1979年   196篇
  1978年   153篇
  1977年   146篇
  1976年   126篇
  1975年   102篇
  1974年   122篇
  1973年   115篇
  1972年   98篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
21.
22.
23.
The many challenges faced by health sciences libraries of all types and sizes often require innovative solutions. When an innovative solution involves calculated risk taking, the approach is called intrapreneurial. At the University of Miami School of Medicine, an intrapreneurial approach solved the fiscal problems of the biomedical communications unit. The Louis Calder Memorial Library inherited these problems when the Department of the Library and Biomedical Communications was created in the early 1980s. In this paper, two intrapreneurial programs are described, and the benefit and suitability of this management style to information services are demonstrated.  相似文献   
24.
The purpose of this investigation was to describe the morphological parameters that characterize elite age group divers. Comparisons are made to normative age group data from the Coquitlam Growth Study and the constancy of important characteristics from age group to age group is examined. Data were collected on 27 male and 28 female elite divers who participated in the 1990 North American Age Group Diving Championships. Body build, body composition and skinfold corrected diameters were determined from 36 anthropometric parameters and analysed by ANOVA, t-test and Phantom z-scores procedures. All age groups except the 14- to 15-year-old males were significantly (P < or = 0.05) shorter than their norms but recorded higher androgyny index values. The estimated relative muscle mass increased significantly (P < or = 0.05) with age for males at all ages (40.8-46.3%). The 16- to 18-year-old females had a significantly (P < or = 0.05) larger relative muscle component compared to the younger age groups (40.1-38.4%). When normalized for height, active tissue development of the extremities was comparable between the sexes except in the forearm. The results indicate that at all age levels short stature is an important characteristic for divers. Analysis of regional active tissue development provides further insight into sport-specific prerequisites for success at elite levels.  相似文献   
25.
26.
This study describes response to intervention (RTI) screening and progress‐monitoring instruments and procedures in 41 local school settings. For screening the schools most often used published reading assessments or commercial products; a three‐times‐per‐year screening schedule was most prevalent. For progress monitoring schools most often relied on published reading assessments; a weekly progress monitoring schedule was most prevalent. The variability between local school practices is discussed with regard to efficiency, equity, and viability of RTI.  相似文献   
27.
28.
29.
30.
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