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   15184篇
  免费   199篇
  国内免费   10篇
教育   10408篇
科学研究   1858篇
各国文化   148篇
体育   1128篇
综合类   3篇
文化理论   103篇
信息传播   1745篇
  2021年   153篇
  2020年   209篇
  2019年   333篇
  2018年   414篇
  2017年   423篇
  2016年   399篇
  2015年   242篇
  2014年   315篇
  2013年   2779篇
  2012年   306篇
  2011年   315篇
  2010年   285篇
  2009年   269篇
  2008年   327篇
  2007年   267篇
  2006年   253篇
  2005年   232篇
  2004年   233篇
  2003年   194篇
  2002年   201篇
  2001年   266篇
  2000年   270篇
  1999年   237篇
  1998年   140篇
  1997年   127篇
  1996年   156篇
  1995年   139篇
  1994年   133篇
  1993年   148篇
  1992年   227篇
  1991年   216篇
  1990年   208篇
  1989年   218篇
  1988年   172篇
  1987年   185篇
  1986年   189篇
  1985年   226篇
  1984年   169篇
  1983年   178篇
  1982年   175篇
  1981年   155篇
  1980年   148篇
  1979年   179篇
  1978年   165篇
  1977年   152篇
  1976年   137篇
  1975年   96篇
  1974年   126篇
  1973年   117篇
  1969年   96篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Among the huge maze of resources available on the Internet, UnCoverWeb stands out as a valuable tool for medical libraries. This up-to-date, free-access, multidisciplinary database of periodical references is searched through an easy-to-learn graphical user interface that is a welcome improvement over the telnet version. This article reviews the basic and advanced search techniques for UnCoverWeb, as well as providing information on the document delivery functions and table of contents alerting service called Reveal. UnCover's currency is evaluated and compared with other current awareness resources. System deficiencies are discussed, with the conclusion that although UnCoverWeb lacks the sophisticated features of many commercial database search services, it is nonetheless a useful addition to the repertoire of information sources available in a library.  相似文献   
53.
54.
55.
56.
57.
58.
This paper reviews the current situation in library school education for medical librarianship in the United States and Canada based on information from a questionnaire sent to teachers of courses in medical librarianship in accredited library schools. Since 1939, when the first course devoted entirely to medical librarianship was offered at Columbia University, courses have been introduced into the curricula of at least forty-seven of the ALA-accredited library schools. In 1978 there were seventy courses available through forty-seven library schools. Possibilities for specialization in medical librarianship are examined. Course content is reviewed. Implications of the MLA certification examination for library school courses are explored.  相似文献   
59.
This study sought to determine if exposure to two communication-oriented activities, videotapes and public service announcements, accounts for changes in substance use among adolescents participating in the Drug Resistance Strategies Project's keepin' it REAL adolescent substance use prevention curriculum. Middle-school students (4,734, 72% Latino) responded to questionnaires related to these analyses. An analysis of covariance (ANCOVA) model was fit separately to six substance use outcomes. The results suggested that intervention students who saw four or five videos engaged in less substance use in the past month than did students who saw fewer videos. Having seen the PSAs one or more times did not predict the reported change in substance use.  相似文献   
60.
Chinese Studies Librarianship in North America   总被引:1,自引:0,他引:1  
Although American libraries had begun collecting Chinese language materials in the 19th century, notably the United States Library of Congress in 1869, Yale in 1878, Harvard in 1879, and Berkeley in 1896, East Asian studies librarianship in North America, including China studies librarianship, was not fully developed until the 1960s. There was no formal organization that represented the interest of Chinese studies librarians because there were few of them and most of them were China scholars rather than trained librarians. More than 100 years later, the number of Chinese studies librarians in North America has increased considerably, primarily in response to the demand in the field of China studies and more recently to the needs of immigrant population and the general public who has an interest in China.This paper traces the history and growth of Chinese studies librarianship in North America, documents the development of the professional organization that represents Chinese studies librarians, and exami.  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