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   43126篇
  免费   854篇
  国内免费   6篇
  43986篇
  2020年   450篇
  2019年   431篇
  2018年   711篇
  2017年   688篇
  2016年   722篇
  2015年   469篇
  2014年   641篇
  2013年   3091篇
  2012年   1185篇
  2011年   1291篇
  2010年   750篇
  2009年   785篇
  2008年   1108篇
  2007年   1092篇
  2006年   1011篇
  2005年   897篇
  2004年   870篇
  2003年   828篇
  2002年   823篇
  2001年   1431篇
  2000年   1422篇
  1999年   1076篇
  1998年   478篇
  1997年   412篇
  1992年   881篇
  1991年   788篇
  1990年   867篇
  1989年   773篇
  1988年   733篇
  1987年   714篇
  1986年   753篇
  1985年   820篇
  1984年   626篇
  1983年   560篇
  1982年   435篇
  1981年   394篇
  1979年   676篇
  1978年   514篇
  1977年   438篇
  1976年   411篇
  1975年   620篇
  1974年   692篇
  1973年   680篇
  1972年   570篇
  1971年   515篇
  1970年   444篇
  1969年   528篇
  1968年   623篇
  1967年   544篇
  1966年   569篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
251.
The author explores the developmental consequences of parental divorce on college students. A critique of the literature in this area and its implications for counselors are provided.  相似文献   
252.
253.
A classifier based on the linear regression model was developed to automatically detect sharp transients in EEG, matching the definition of spikes and sharp waves accepted by IFSECN. Practical applications proved the accuracy of the method which succeeded in detecting 84% of sharp transients previously found by an experienced electronencephalographer. Computerized search for sharp transients in EEG records will be particularly useful in long term EEG records obtained from epileptic patients.  相似文献   
254.
As a result of Freud's ambiguity (and that of later analysts) regarding the nature of the superego and how to treat it in clinical practice, it has taken many years and many theoreticians to move from Freud's predilection to use it for purposes of "suggestion" in overcoming resistance, toward the concept of the superego as part of the ego's hierarchically mobilized defensive activities in the analytical process. Although much ambiguity persists, an attempt is made here to reduce it so that analytical technique may move forward to allow the superego to be analyzed as an unconscious conflict solution.  相似文献   
255.
Investigating the specific of psychic performance disorders in epileptics structural aspects in addition to quantitative performance differences are considerable. We compared psychometrically obtained performance structures of epileptic children and adults and of parallelised healthy control persons. It became evident, that the performance differentiation hypothesis is to corroborate also in epileptic patients. The psychic performance structure of epileptics is characterized by a lower differentiation level of the basis functions underlining the performances. Our factor analytic investigations emphasize the importance of deceleration of psychic/psychomotoric speed in epileptics as primary basic disorder.  相似文献   
256.
Intrathecal methotrexate-overdosage in the meningosis therapy leads to CNS damages dependent on dose. It was given a own case report and a literature review with clinical symptoms and the therapy in this complication. Neuropathologic findings included demyelinisation und necrosis of the white matter.  相似文献   
257.
By his introduction of the term "psychisches Trauma", Strümpell exerted an influence on Oppenheims concept of traumatic neurosis. What he termed "Begehrensvorstellungen", too, had an important part to play in the ensuing discussion on the origin of traumatic neuroses. That the two sides in dispute nonetheless appealed to the authority of the internist and neurologist Strümpell in matters of expert opinion, is an indication of his discernment in these problematic open questions.  相似文献   
258.
This study examines the ability of five self-report assessment measures to predict college students' drug use across 12 pharmacological drug categories. Subjects were 125 female and 61 male university undergraduate students. The test battery included the following instruments: the Psychopathic Deviancy (Pd) scale of the Minnesota Multiphasic Personality Inventory (MMPI); the MacAndrew Alcoholism scale (MAC), a special scale of the MMPI; the Sensation Seeking Scale (SSS); the Millon Alcohol Abuse Scale; and the Millon Drug Abuse Scale. Scores from these instruments were utilized in linear combinations to predict individual drug use outcomes as well as polydrug versus single drug use patterns. The drug categories included in this investigation are coffee, tobacco, alcohol, marijuana, tranquilizers, depressants, amphetamines, LSD, other hallucinogens, solvents, narcotics, and cocaine. Results demonstrate significant and meaningful relationships between predictors and drug use levels among college students. Weighted equations derived from linear discriminant function analyses were generally capable of accurately classifying subject's drug use levels across drug categories and in discriminating single drug use from polydrug use patterns. Typically, the Sensation Seeking Scale entered as the most powerful predictor of substance use and abuse.  相似文献   
259.
Male liberation     
This article on Liberation approaches the subject from the perspective ofmen. Women have taken the lead in trying to throw off the bondage of patriarchy. Men have, for the most part, been reactors to the evolving changes. The author feels that there is a more creative role for men to play, but first, we must become more conscious of the ways in which our privileged position oppresses us. The author documents this dynamic as well as points to some possible directions for men to move in their personal and professional lives. The priority on developing collegiality and inclusiveness in our professional associations gives this subject an important place in our thinking and decisionmaking.This paper was read at a workshop on male liberation at the National A.A.P.C. Convention in San Antonio, April 30,1982.  相似文献   
260.
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