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   23128篇
  免费   400篇
  国内免费   15篇
教育   16490篇
科学研究   2042篇
各国文化   219篇
体育   1972篇
综合类   13篇
文化理论   177篇
信息传播   2630篇
  2022年   175篇
  2021年   263篇
  2020年   383篇
  2019年   606篇
  2018年   829篇
  2017年   805篇
  2016年   714篇
  2015年   427篇
  2014年   662篇
  2013年   4468篇
  2012年   639篇
  2011年   651篇
  2010年   472篇
  2009年   488篇
  2008年   552篇
  2007年   484篇
  2006年   430篇
  2005年   417篇
  2004年   380篇
  2003年   361篇
  2002年   351篇
  2001年   480篇
  2000年   396篇
  1999年   365篇
  1998年   207篇
  1997年   218篇
  1996年   243篇
  1995年   238篇
  1994年   183篇
  1993年   203篇
  1992年   325篇
  1991年   304篇
  1990年   302篇
  1989年   299篇
  1988年   256篇
  1987年   305篇
  1986年   268篇
  1985年   307篇
  1984年   247篇
  1983年   213篇
  1982年   193篇
  1981年   166篇
  1980年   154篇
  1979年   260篇
  1978年   185篇
  1977年   171篇
  1976年   157篇
  1975年   146篇
  1974年   149篇
  1971年   143篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
872.
873.
874.
Reading readiness varies as a function of family and environmental variables. This study of 11-year-old children (N = 39) was designed to determine if there was an additional or interactive contribution of brain structure. Evidence is presented that both environmental and biological variables predict phonological development. Temporal lobe (planar) asymmetry, hand preference, family history of reading disability, and SES explained over half of the variance in phonological and verbal performance. The results demonstrate a linear association between cerebral organization and phonological skill within socioeconomic groups. These data provide concrete evidence to support the commonly held assumption that both environmental and biological factors are independent determinants of a child's ability to process linguistic information.  相似文献   
875.
876.
877.
In 1990, the Republican Scientific-Medical Library (RSML) of the Ministry of Health of Armenia in collaboration with the Fund for Armenian Relief created a vision of a national library network supported by information technology. This vision incorporated four goals: (1) to develop a national resource collection of biomedical literature accessible to all health professionals, (2) to develop a national network for access to bibliographic information, (3) to develop a systematic mechanism for sharing resources, and (4) to develop a national network of health sciences libraries. During the last decade, the RSML has achieved significant progress toward all four goals and has realized its vision of becoming a fully functional national library. The RSML now provides access to the literature of the health sciences including access to the Armenian medical literature, provides education and training to health professionals and health sciences librarians, and manages a national network of libraries of the major health care institutions in Armenia. The RSML is now able to provide rapid access to the biomedical literature and train health professionals and health sciences librarians in Armenia in information system use. This paper describes the evolution of the RSML and how it was accomplished.  相似文献   
878.
Academic medical librarians responsible for monograph acquisition face a challenging task. From the plethora of medical monographs published each year, academic medical librarians must select those most useful to their patrons. Unfortunately, none of the selection tools available to medical librarians are specifically intended to assist academic librarians with medical monograph selection. The few short core collection lists that are available are intended for use in the small hospital or internal medicine department library. As these are the only selection tools available, however, many academic medical librarians spend considerable time reviewing these collection lists and place heavy emphasis on the acquisition of listed books. The study reported here was initiated to determine whether the circulation of listed books in an academic library justified the emphasis placed on the acquisition of these books. Circulation statistics for "listed" and "nonlisted" books in the hematology (WH) section of Indiana University School of Medicine's Ruth Lilly Medical Library were studied. The average circulation figures for listed books were nearly two times as high as the corresponding figures for the WH books in general. These data support the policies of those academic medical libraries that place a high priority on collection of listed books.  相似文献   
879.
880.
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