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   21936篇
  免费   314篇
  国内免费   60篇
教育   15862篇
科学研究   1713篇
各国文化   225篇
体育   1743篇
综合类   52篇
文化理论   181篇
信息传播   2534篇
  2022年   146篇
  2021年   273篇
  2020年   385篇
  2019年   575篇
  2018年   829篇
  2017年   873篇
  2016年   814篇
  2015年   522篇
  2014年   672篇
  2013年   4431篇
  2012年   639篇
  2011年   668篇
  2010年   553篇
  2009年   529篇
  2008年   526篇
  2007年   525篇
  2006年   497篇
  2005年   453篇
  2004年   331篇
  2003年   323篇
  2002年   294篇
  2001年   460篇
  2000年   363篇
  1999年   304篇
  1998年   224篇
  1997年   199篇
  1996年   229篇
  1995年   172篇
  1994年   189篇
  1993年   162篇
  1992年   257篇
  1991年   240篇
  1990年   257篇
  1989年   236篇
  1988年   194篇
  1987年   198篇
  1986年   203篇
  1985年   201篇
  1984年   195篇
  1983年   168篇
  1982年   141篇
  1981年   144篇
  1980年   131篇
  1979年   203篇
  1978年   169篇
  1977年   122篇
  1976年   129篇
  1975年   115篇
  1973年   111篇
  1971年   117篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
21.
The role of the literary agent and the reception granted agents by publishers have changed markedly over the course of the twentieth century. Henry Holt’s views of agents, written in the first decade of the century, help define the status and activities of agents at that time. These are compared with the role of agents today, using archival sources, the book trade literature, and interviews. Thomas L. Bonn, review editor of this journal, is a librarian, Library at State University College at Cortland. He is the author ofUnder Cover: An Illustrated History of American Mass Market Paperbacks andHeavy Traffic and High Culture: The New American Library as Literary Gatekeeper. He is working on a study of American literary agents.  相似文献   
22.
23.
24.
25.
26.
Duchenne Muscular Dystrophy (DMD) is a neurogenetic developmental disorder that presents with progressive muscular weakness. It is caused by a mutation in a gene that results in the absence of specific products that normally localize to muscle cells and the central nervous system (CNS). The majority of affected individuals have IQs within the normal range, generally with lower verbal than performance IQ scores. Prior work has demonstrated selective deficits on tests of verbal span and immediate memory. For the current study, 26 boys with DMD (and normal intellectual function) and their unaffected siblings were evaluated. Paired comparisons demonstrated that the children with DMD had significantly poorer academic achievement scores than their siblings, even though their vocabulary levels and home and educational environments were comparable. Children with DMD also had more behavioral concerns, physical disabilities, and poorer verbal memory spans. Linear regression indicated that behavioral concerns, executive function, and physical disability did not contribute substantially to academic performance, whereas performance on verbal span did. DMD presents with a selective developmental aberration in verbal span that has wide‐ranging consequences on learning skills.  相似文献   
27.
The article sets off with a brief summary of the history of appraisal and disposal of records as processed at the National Archives of Iceland (NAI) since its establishment in 1882 to present times. Rules on appraisal and disposal of records introduced in 1900, 1911, and 1916 were ignored and all records were kept. Status quo remained until 1985 when a new National Archives Act was passed. The appraisal and disposal process adopted then is described and explained. It included the publication of instructions on records management as well as forms relating to records management. The influence of acts of law on the appraisal and disposal process is explained. Finally the experience with the arrangement of organised appraisal in Iceland is described.  相似文献   
28.
The 1991 Janet Doe lecturer describes the vision held by the founders of the Medical Library Association of medical information being readily accessible to health professionals no matter how far they were located from major medical centers, and traces the pursuit of this vision to current outreach activities.  相似文献   
29.
30.
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