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   51634篇
  免费   844篇
  国内免费   3篇
  52481篇
  2020年   650篇
  2019年   796篇
  2018年   1058篇
  2017年   1127篇
  2016年   1160篇
  2015年   810篇
  2014年   1027篇
  2013年   4378篇
  2012年   1806篇
  2011年   1839篇
  2010年   1187篇
  2009年   1165篇
  2008年   1641篇
  2007年   1638篇
  2006年   1546篇
  2005年   1356篇
  2004年   1269篇
  2003年   1239篇
  2002年   1243篇
  2001年   1387篇
  2000年   1318篇
  1999年   1071篇
  1998年   558篇
  1997年   566篇
  1996年   525篇
  1995年   513篇
  1994年   492篇
  1993年   484篇
  1992年   866篇
  1991年   792篇
  1990年   833篇
  1989年   717篇
  1988年   724篇
  1987年   712篇
  1986年   730篇
  1985年   700篇
  1984年   656篇
  1983年   609篇
  1982年   473篇
  1981年   459篇
  1980年   456篇
  1979年   673篇
  1978年   514篇
  1977年   440篇
  1975年   540篇
  1974年   591篇
  1973年   613篇
  1972年   449篇
  1968年   498篇
  1967年   457篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
W Lüders 《Psyche》1988,42(3):216-220
  相似文献   
42.
43.
44.
45.
The IES Arrow-Dot was administered to 41 cocaine detoxification patients. This group's scores indicated lower ego functioning and higher impulsivity and superego functioning than other clinical samples. No significant differences were noted between the Arrow-Dot scores of patients who successfully completed the program and those who did not.  相似文献   
46.
47.
We obtain in this paper a representation of the formulae of extensions ofL by generalized quantifiers through functors between categories of first-order structures and partial isomorphisms. The main tool in the proofs is the back-and-forth technique. As a corollary we obtain the Caicedo's version of Fraïssés theorem characterizing elementary equivalence for such languages. We also discuss informally some geometrical interpretations of our results.  相似文献   
48.
This article examines how values, as orienting beliefs about what is good for a client, group of clients, or a nation, affect the delivery of counseling services. Specifically, this article explores the role of value assumptions within such areas as counselor-client interactions, psychometrics, career services, and the transportability of counseling theories across national boundaries.  相似文献   
49.
Computerized career information and guidance systems, although now commonplace, have received little psychometric scrutiny. The authors argue for examining these systems in the same way in which paper and pencil instruments are assessed. Consideration is also given to issues related to programming, technical-service problems, and staffing.  相似文献   
50.
Past research on delinquency and crime has provided convincing data about correlates but not about causes, because it has been largely cross-sectional in design. Whereas cross-sectional research focuses on variations between subjects, longitudinal research can provide information about changes within subjects, which are more important for causes, prevention, and treatment. Many of the most important results in criminology have been obtained in longitudinal or experimental studies, and the major studies of these types are reviewed here. It is now desirable to combine the two methods in a new coordinated program of longitudinal studies including experimental interventions or quasi-experimental analyses. Such projects could study several overlapping cohorts, extend from birth to adulthood, have frequent data collection, and obtain data from a variety of sources about many different types of antisocial behavior.  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