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   31349篇
  免费   498篇
  国内免费   137篇
教育   21727篇
科学研究   3058篇
各国文化   304篇
体育   3290篇
综合类   30篇
文化理论   234篇
信息传播   3341篇
  2022年   211篇
  2021年   320篇
  2020年   508篇
  2019年   761篇
  2018年   1047篇
  2017年   1028篇
  2016年   911篇
  2015年   579篇
  2014年   840篇
  2013年   5753篇
  2012年   802篇
  2011年   812篇
  2010年   631篇
  2009年   666篇
  2008年   692篇
  2007年   620篇
  2006年   595篇
  2005年   544篇
  2004年   717篇
  2003年   678篇
  2002年   664篇
  2001年   827篇
  2000年   589篇
  1999年   485篇
  1998年   299篇
  1997年   299篇
  1996年   319篇
  1995年   325篇
  1994年   263篇
  1993年   273篇
  1992年   443篇
  1991年   391篇
  1990年   404篇
  1989年   418篇
  1988年   348篇
  1987年   403篇
  1986年   364篇
  1985年   415篇
  1984年   345篇
  1983年   324篇
  1982年   273篇
  1981年   234篇
  1980年   228篇
  1979年   377篇
  1978年   258篇
  1977年   225篇
  1976年   237篇
  1975年   197篇
  1974年   208篇
  1971年   193篇
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
131.
Information specialists should provide a value-added service by supplementing their online searches with primary research. Primary research results in more up-to-date information from a broader spectrum of sources. The requester benefits from primary research by receiving a cost-effective and more comprehensive information package. The information professional benefits by acquiring a more in-depth knowledge of the subject, increasing awareness of important projects within the organization, and achieving recognition as a key information analyst.  相似文献   
132.
Successful hospital and corporate libraries offer customized resources and services to meet the needs of their dynamic organizations. Concepts such as customer-driven, service-oriented and value-added are central to these libraries. Serving decision makers and integrating the library into the decision-making process of the organization is critical. Future articles in this new column will further explore the underlying philosophies and the specialized resources and services that characterize these libraries.  相似文献   
133.
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   
134.
135.
"The U.S. Bureau of the Census created the State Data Center program in 1978 to improve public access to census information. This article discusses the background, structure, and services of that program; the role of libraries in the program; and future directions in State Data Center/library relationships. The appendix lists contact person names, as well as addresses and telephone numbers for State Data Center lead agencies."  相似文献   
136.
137.
138.
139.
140.
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