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   132189篇
  免费   1681篇
  国内免费   246篇
教育   91272篇
科学研究   13973篇
各国文化   2009篇
体育   10610篇
综合类   197篇
文化理论   1120篇
信息传播   14935篇
  2021年   1010篇
  2020年   1726篇
  2019年   2644篇
  2018年   3403篇
  2017年   3637篇
  2016年   3620篇
  2015年   2368篇
  2014年   3209篇
  2013年   27424篇
  2012年   2662篇
  2011年   3211篇
  2010年   2541篇
  2009年   2695篇
  2008年   2695篇
  2007年   2471篇
  2006年   2609篇
  2005年   2612篇
  2004年   3291篇
  2003年   2520篇
  2002年   2375篇
  2001年   2366篇
  2000年   2033篇
  1999年   1874篇
  1998年   1509篇
  1997年   1567篇
  1996年   1718篇
  1995年   1482篇
  1994年   1492篇
  1993年   1486篇
  1992年   1698篇
  1991年   1589篇
  1990年   1588篇
  1989年   1571篇
  1988年   1396篇
  1987年   1340篇
  1986年   1350篇
  1985年   1629篇
  1984年   1435篇
  1983年   1417篇
  1982年   1313篇
  1981年   1230篇
  1980年   1217篇
  1979年   1433篇
  1978年   1281篇
  1977年   1175篇
  1976年   1078篇
  1975年   879篇
  1974年   891篇
  1973年   861篇
  1971年   729篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
281.
282.
283.
284.
285.
This paper examines end-user, online searching using data from a questionnaire mailed to 150 Canadian health professionals in practice settings. The response rate was 83% (n = 124). The data provide a demographic profile of early adopters of end-user searching in the health care community. Positive correlations with the user's level of implementation of end-user searching were found for the following variables: amount of time spent in research activities, amount of system training received, and use of Medical Subject Headings (MeSH). There was a negative association between the amount of time spent in patient care and implementation level. General practitioners and family physicians had lower implementation levels than physicians in other specialties. Successful implementers were more likely to be computer literate and to place a high value on formal information sources such as books, journals, and libraries. Health professionals using so-called "user-friendly" or menu-based software had lower levels of personal commitment to using online databases, as measured by a combination of continuance of use, willingness to pay personally, type of recommendations made to colleagues, and hardware ownership.  相似文献   
286.
287.
288.
289.
This study was designed to examine children's attitudes toward the role of sports in determining social status, as well as the activities in which children prefer to participate. A total of 227 boys and 251 girls in Grades 4, 5, and 6 completed a questionnaire to determine which criteria were most important in determining personal, female, and male popularity. Personal popularity was answered by the girls and boys according to "what would make you well liked by your classmates." Female and male popularity was determined by asking both girls and boys to decide "what would make (girls, for female subjects, and boys, for male subjects) well liked by your classmates." A comparison of results from the Buchanan, Blankenbaker, and Cotten (1976) investigation and the present study indicated that, in the last 15 years, appearance has become more important and academic achievement less important in determining personal popularity for girls. For boys, the comparison revealed that sports have become more important and academic achievement less important in determining personal popularity. Boys reported sports to be the most important determinant of personal and male popularity and appearance as the most important determinant of female popularity. Sports and appearance became more important for boys with each higher grade level. Girls reported appearance to be the most important determinant of personal, male, and female popularity. For girls, appearance became more important with each higher grade level. A comparison of results from the Buchanan et al. (1976) and the present study indicated that the activities in which girls and boys preferred to participate have changed.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
290.
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