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   21764篇
  免费   104篇
  国内免费   28篇
教育   15716篇
科学研究   2290篇
各国文化   96篇
体育   1621篇
综合类   7篇
文化理论   495篇
信息传播   1671篇
  2022年   75篇
  2021年   107篇
  2020年   154篇
  2019年   233篇
  2018年   2417篇
  2017年   2328篇
  2016年   1805篇
  2015年   291篇
  2014年   370篇
  2013年   1922篇
  2012年   478篇
  2011年   930篇
  2010年   1036篇
  2009年   615篇
  2008年   837篇
  2007年   1335篇
  2006年   284篇
  2005年   577篇
  2004年   607篇
  2003年   537篇
  2002年   285篇
  2001年   192篇
  2000年   190篇
  1999年   174篇
  1998年   87篇
  1997年   95篇
  1996年   116篇
  1995年   81篇
  1994年   101篇
  1993年   92篇
  1992年   163篇
  1991年   157篇
  1990年   147篇
  1989年   141篇
  1988年   118篇
  1987年   121篇
  1986年   145篇
  1985年   138篇
  1984年   116篇
  1983年   133篇
  1982年   113篇
  1981年   108篇
  1980年   97篇
  1979年   172篇
  1978年   113篇
  1977年   111篇
  1976年   106篇
  1975年   90篇
  1974年   93篇
  1971年   71篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
14.
15.
16.
17.
18.
Working Graphs     
  相似文献   
19.
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   
20.
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   
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