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   29328篇
  免费   485篇
  国内免费   516篇
教育   21223篇
科学研究   2811篇
各国文化   98篇
体育   2826篇
综合类   1227篇
文化理论   97篇
信息传播   2047篇
  2022年   245篇
  2021年   458篇
  2020年   466篇
  2019年   506篇
  2018年   490篇
  2017年   555篇
  2016年   507篇
  2015年   719篇
  2014年   1083篇
  2013年   3770篇
  2012年   1415篇
  2011年   1629篇
  2010年   1524篇
  2009年   1467篇
  2008年   1654篇
  2007年   1439篇
  2006年   1444篇
  2005年   1152篇
  2004年   954篇
  2003年   737篇
  2002年   711篇
  2001年   731篇
  2000年   503篇
  1999年   304篇
  1998年   146篇
  1997年   170篇
  1996年   179篇
  1995年   195篇
  1994年   151篇
  1993年   171篇
  1992年   228篇
  1991年   211篇
  1990年   215篇
  1989年   239篇
  1988年   229篇
  1987年   199篇
  1986年   198篇
  1985年   211篇
  1984年   183篇
  1983年   221篇
  1982年   150篇
  1981年   147篇
  1980年   146篇
  1979年   216篇
  1978年   170篇
  1977年   159篇
  1976年   136篇
  1975年   121篇
  1974年   115篇
  1973年   122篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
992.
993.
994.
Problems in interagency collaboration: Lessons from a project that failed   总被引:1,自引:0,他引:1  
Several institutions (e.g., child welfare, police, court, health, education, social service) are necessarily involved in the management of child abuse in all communities. The need for better cooperation among them has been acknowledged; inquests into child deaths resulting from abuse have often attributed some blame to faulty communication and/or poor cooperation between the institutions. The Community Child Abuse Team (CCAT) Project was designed by these same institutions in Hamilton, Ontario, to maximize interagency collaboration. The hypothesis, that this "interagency collaboration" model would provide more efficient and effective services to abused children and their families, was never tested. During its 30 months of operation the CCAT program never materialized as planned and funding was terminated. This paper describes selected problems and issues that arose during the struggle to implement the project. The central problematic issue was control. Those responsible for the project lacked the power to insist that the design be adhered to during the initial stage.  相似文献   
995.
A project to recatalog and reclassify the book collection of the Bowman Gray School of Medicine Library utilizing the Magnetic Tape/Selectric Typwriter system for simultaneous catalog card production and computer stored data acquisition marks the beginning of eventual computerization of all library operations. A keyboard optical display system will be added by late 1970. Major input operations requiring the creation of "hard copy" will continue via the MTST system. Updating, editing and retrieval operations as well as input without hard copy production will be done through the "on-line" keyboard optical display system. Once the library's first data bank, the book catalog, has been established the computer may be consulted directly for library holdings from any optical display terminal throughout the medical center. Three basic information retrieval operations may be carried out through "on-line" optical display terminals. Output options include the reproduction of part or all of a given document, or the generation of statistical data, which are derived from two Acquisition Code lines. The creation of a central bibliographic record of Bowman Gray Faculty publications patterned after the cataloging program is presently under way. The cataloging and computer storage of serial holdings records will begin after completion of the reclassification project. All acquisitions added to the collection since October 1967 are computer-stored and fully retrievable. Reclassification of older titles will be completed in early 1971.  相似文献   
996.
Two undergraduate statistics course designs were compared for their effects on attitudes involving perceived competency with respect to course content, the concept of psychology as a science, the social atmosphere within a course and the interest and value in the area of statistics and research design. One design involved the traditional format of lecture-laboratory-discussion while the other was modeled after Keller's personalized program involving the application of principles of behavioral analysis. The Keller design produced more positive attitudes with respect to perceived competency and the notion of psychology as a science. The attitudes toward the social atmosphere and the interest and value in the course were higher at the beginning of the personalized design and did not change as a result of the students' experiences in the courses. The outcomes seem to be a result of both the specific course design and the context or learning system in which the student functions.  相似文献   
997.
998.
999.
1000.
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