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   21891篇
  免费   925篇
  国内免费   14篇
  22830篇
  2020年   258篇
  2019年   243篇
  2018年   424篇
  2017年   367篇
  2016年   385篇
  2015年   255篇
  2014年   360篇
  2013年   1572篇
  2012年   626篇
  2011年   681篇
  2010年   367篇
  2009年   451篇
  2008年   600篇
  2007年   601篇
  2006年   559篇
  2005年   488篇
  2004年   469篇
  2003年   463篇
  2002年   418篇
  2001年   806篇
  2000年   805篇
  1999年   592篇
  1998年   238篇
  1997年   216篇
  1993年   195篇
  1992年   488篇
  1991年   429篇
  1990年   488篇
  1989年   409篇
  1988年   384篇
  1987年   368篇
  1986年   389篇
  1985年   441篇
  1984年   342篇
  1983年   288篇
  1982年   221篇
  1979年   322篇
  1978年   258篇
  1977年   205篇
  1976年   202篇
  1975年   299篇
  1974年   347篇
  1973年   351篇
  1972年   275篇
  1971年   241篇
  1970年   209篇
  1969年   231篇
  1968年   289篇
  1967年   254篇
  1966年   273篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
952.
Previous research has suggested that left-handedness relates to delinquency and violence. In an effort to pinpoint the nature of this apparent relationship, we compared the MMPIs of 72 left- and 687 right-handed men 60 yr. old or less on an alcohol treatment ward. No significant differences appeared. The results are compared to earlier research and hypotheses for further research are suggested.  相似文献   
953.
The results of clinical, electroencephalographic and repeated computed tomographic examination of 14 children suffering from epileptic seizures in connection with the West and Lennox-Gastaud syndrome are analyzed and compared. Computed tomography yields little information regarding the etiology of such forms of epilepsy. Distinct clinical and electroencephalographic findings were accompanied by normal computed tomographic results in a large proportion of the cases. To avoid misinterpretation of computed tomographic findings and consequent prognostic errors in these epileptic cases it is necessary to take possible side effects of ACTH and corticosteroid treatment into account. At the climax of hormone treatment computed tomography revealed imposing changes in the form of generalized atrophy in 10 of the 14 children examined. These receded completely upon termination of hormone treatment.  相似文献   
954.
Two simple sociometric techniques for practical use are described which are derived from the data given in the sociogram. Compared with the conventional sociogram, the group rank score we use everyday therapy has the advantage that it can be published. It permits members of the group to better identify the social situations which cause specific psychic impulses. The sociogram is reserved for the therapist. In our opinion the sociodynamogram has certain advantages over both methods because it provides an insight into spheres which are inaccessible in the sociogram and group rank score.  相似文献   
955.
The levels of 20 amino acids were measured in the plasma and cerbrospinal fluid of 41 patients with endogenic depressions. The plasma levels of 12 amino acids were found to be significantly lower in the patients than in the control group, but cerebrospinal fluid levels were significantly lower only in the case of taurine, glutamine, phenylalanine and aginine. Comparison of the same amino acid levels in treated and non-treated patients showed that serine and alpha-aminobutyric acid serum concentrations were higher in the nontreated patients. The tyrosine and phenylalanine levels in the cerebrospinal fluid of the patients who had received medicamentous treatment were higher than in the other group.  相似文献   
956.
957.
Beliefs about cancer, heart disease, and their victims   总被引:1,自引:0,他引:1  
  相似文献   
958.
959.
960.
Multiple personality is a dissociative hysterical condition in which there are two or more autonomous personalities. Historically multiple personality has been viewed as an oedipal conflict. Case studies, however, indicate the importance of preoedipal dynamic issues as well. Both ego splitting and oedipal repression seem to be the basic defense mechanisms. The depressive position, in which there is integration of good and bad objects, has not been reached. Objects are split on the basis of sex in that the mother is seen as all bad, while the father is seen as all good. Multiple personality can be considered to occupy a position between oedipal and preoedipal development.  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