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   37346篇
  免费   1447篇
  国内免费   22篇
  38815篇
  2020年   398篇
  2019年   471篇
  2018年   658篇
  2017年   678篇
  2016年   712篇
  2015年   507篇
  2014年   650篇
  2013年   3184篇
  2012年   1147篇
  2011年   1221篇
  2010年   794篇
  2009年   766篇
  2008年   1138篇
  2007年   1076篇
  2006年   1059篇
  2005年   938篇
  2004年   902篇
  2003年   918篇
  2002年   926篇
  2001年   864篇
  2000年   845篇
  1999年   710篇
  1998年   440篇
  1997年   462篇
  1996年   447篇
  1995年   411篇
  1992年   618篇
  1991年   589篇
  1990年   569篇
  1989年   533篇
  1988年   514篇
  1987年   509篇
  1986年   570篇
  1985年   574篇
  1984年   525篇
  1983年   461篇
  1981年   399篇
  1979年   500篇
  1978年   429篇
  1977年   378篇
  1976年   389篇
  1975年   427篇
  1974年   522篇
  1973年   542篇
  1972年   391篇
  1971年   408篇
  1969年   399篇
  1968年   459篇
  1967年   424篇
  1966年   439篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
Ratings of pre-morbid intelligence level, derived from the hospital charts of 26 chronic schizophrenics, were correlated with the post-mortem brain volume measures of cortex, white matter, central grey matter, and ventricles. Contrary to hypothesis, no significant correlations were found.  相似文献   
104.
M. W. Bunder 《Studia Logica》1988,47(2):129-143
In the early thirties, Church developed predicate calculus within a system based on lambda calculus. Rosser and Kleene developed Arithmetic within this system, but using a Godelization technique showed the system to be inconsistent.Alternative systems to that of Church have been developed, but so far more complex definitions of the natural numbers have had to be used. The present paper based on a system of illative combinatory logic developed previously by the author, does allow the use of the Church numerals. Given a new definition of equality all the Peano-type axioms of Mendelson except one can be derived. A rather weak extra axiom allows the proof of the remaining Peano axiom. Note. The illative combinatory logic used in this paper is similar to the logic employed in computer languages such as ML.The author wishes to thank Dr. Roger Hindley for proofreading this paper and for making some useful suggestions. This paper was presented at the 1986 Annual Conference of the Australasian Association of Logic in Auckland, 9–12 July, 1986.  相似文献   
105.
The authors discuss the results of a study designed to assess nationally certified counselors' perceptions of the relevance of elements of the National Board for Certified Counselors examination to their work as counselors. Support for the validity and appropriateness of the examination in regard to perceived relevance and lack of differentiation on the basis of respondent characteristics were found.  相似文献   
106.
107.
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   
108.
Young and older adults were presented with pictures for study. Their recognition of the information was tested at five retention intervals: immediately, and 48 hr, 1 week, 2 weeks, and 4 weeks later. The main finding of interest was that picture recognition did not show an age-related decline until the 1-week retention interval.  相似文献   
109.
110.
The goal of the authors is to (a) create an awareness among counselors about the nature and prevalence of child sexual abuse, (b) examine myths and realities about the topic, and (c) present recommendations for interviewing suspected victims of child sexual abuse.  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