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   24638篇
  免费   431篇
  国内免费   15篇
教育   17768篇
科学研究   2066篇
各国文化   238篇
体育   1991篇
综合类   14篇
文化理论   187篇
信息传播   2820篇
  2022年   189篇
  2021年   282篇
  2020年   418篇
  2019年   661篇
  2018年   919篇
  2017年   881篇
  2016年   784篇
  2015年   460篇
  2014年   722篇
  2013年   4820篇
  2012年   686篇
  2011年   715篇
  2010年   532篇
  2009年   544篇
  2008年   613篇
  2007年   538篇
  2006年   469篇
  2005年   452篇
  2004年   405篇
  2003年   385篇
  2002年   369篇
  2001年   491篇
  2000年   415篇
  1999年   371篇
  1998年   227篇
  1997年   235篇
  1996年   260篇
  1995年   257篇
  1994年   198篇
  1993年   230篇
  1992年   341篇
  1991年   313篇
  1990年   317篇
  1989年   318篇
  1988年   272篇
  1987年   309篇
  1986年   273篇
  1985年   309篇
  1984年   250篇
  1983年   214篇
  1982年   195篇
  1981年   165篇
  1980年   158篇
  1979年   267篇
  1978年   185篇
  1977年   173篇
  1976年   157篇
  1975年   146篇
  1974年   151篇
  1971年   141篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
931.
932.
In the fall of 1976 applications for admission to the City University of New York (CUNY) had dropped sharply. In total number they were down by almost 13,000 from 1974, a drop of approximately 18%. Several hypotheses have been posited for the sharp decline in student applicants to the City University. Analysis of data drawn from the computer printouts of the City University's allocations indicates that the end of open admissions, for example, does not, in and of itself, explain the application drop. Similarly, the change in allocation formulas at CUNY seems not to explain the enrollment decline adequately. Finally, the imposition of tuition, or the perception about tuition, appears by no means the single most important factor in the enrollment drop. This paper attempts to determine the characteristics of the students not applying and to examine the reasons contributing to the sharp enrollment decline.  相似文献   
933.
934.
935.
936.
937.
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   
938.
939.
940.
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   
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