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   25161篇
  免费   427篇
  国内免费   17篇
教育   17762篇
科学研究   2362篇
各国文化   235篇
体育   2105篇
综合类   20篇
文化理论   211篇
信息传播   2910篇
  2022年   165篇
  2021年   279篇
  2020年   422篇
  2019年   648篇
  2018年   913篇
  2017年   931篇
  2016年   806篇
  2015年   486篇
  2014年   745篇
  2013年   4884篇
  2012年   734篇
  2011年   761篇
  2010年   558篇
  2009年   549篇
  2008年   593篇
  2007年   567篇
  2006年   470篇
  2005年   474篇
  2004年   419篇
  2003年   403篇
  2002年   388篇
  2001年   537篇
  2000年   454篇
  1999年   407篇
  1998年   250篇
  1997年   243篇
  1996年   276篇
  1995年   238篇
  1994年   190篇
  1993年   198篇
  1992年   329篇
  1991年   308篇
  1990年   306篇
  1989年   303篇
  1988年   269篇
  1987年   309篇
  1986年   277篇
  1985年   321篇
  1984年   265篇
  1983年   217篇
  1982年   199篇
  1981年   176篇
  1980年   148篇
  1979年   263篇
  1978年   197篇
  1977年   170篇
  1976年   149篇
  1975年   145篇
  1974年   154篇
  1971年   130篇
排序方式: 共有10000条查询结果,搜索用时 296 毫秒
61.
62.
63.
64.
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   
65.
66.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service.  相似文献   
67.
"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   
68.
69.
Questions concerning some of the values we hold as librarians and the goals, standards, and other evaluation tools we derive from them are discussed in the context of the history of our profession and the present period of rapid change. The concepts of stable and changing paradigms and of "scientific communities" provide the foundation for consideration of how a changing conceptual framework can affect values and their application in the evaluation process. One of many possible scenarios for the future is briefly outlined to demonstrate how some traditional values may fare.  相似文献   
70.
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