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   65136篇
  免费   2760篇
  国内免费   37篇
  67933篇
  2020年   665篇
  2019年   795篇
  2018年   1114篇
  2017年   1091篇
  2016年   1234篇
  2015年   880篇
  2014年   1028篇
  2013年   4782篇
  2012年   1970篇
  2011年   1943篇
  2010年   1197篇
  2009年   1223篇
  2008年   1690篇
  2007年   1682篇
  2006年   1489篇
  2005年   1367篇
  2004年   1306篇
  2003年   1187篇
  2002年   1220篇
  2001年   2123篇
  2000年   2050篇
  1999年   1505篇
  1998年   698篇
  1997年   615篇
  1996年   591篇
  1992年   1348篇
  1991年   1254篇
  1990年   1256篇
  1989年   1149篇
  1988年   1137篇
  1987年   1069篇
  1986年   1093篇
  1985年   1205篇
  1984年   951篇
  1983年   851篇
  1982年   646篇
  1979年   1067篇
  1978年   720篇
  1977年   681篇
  1976年   691篇
  1975年   877篇
  1974年   1014篇
  1973年   1089篇
  1972年   923篇
  1971年   848篇
  1970年   818篇
  1969年   829篇
  1968年   1077篇
  1967年   931篇
  1966年   859篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
911.
With a sample of 18 capital cases tried in Kentucky, South Carolina, and California, we attempted to replicate an earlier study which showed that significantly more defense challenges for cause were granted under conditions of sequestered, individual voir dire than when voir dire was conducted under less enhanced conditions. In the current sample, sequestered, individual voir dire again resulted in more defense removals for cause than obtained with less extensive voir dire. We present data on the defense removals for cause partitioned into five categories according to the reason for the challenge and analyze the effects of jury selection consultants on the various indices of voir dire as well as final sentence.  相似文献   
912.
913.
914.
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth.  相似文献   
915.
Kohut's concept of cure   总被引:1,自引:0,他引:1  
  相似文献   
916.
917.
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   
918.
An investigation into the diagnostic value of psychometric methods for the diagnosis of depressive states involved five psychometric questionnaires, one concentration test procedure, and one problem-solving approach to register cognitive processes. The data obtained for 80 depressive patients of varied aetiology were compared with those of sample of 80 neurotics without depressive aberration. Even univariate comparisons revealed statistically significant differences between the two samples. Multivariate methods (factor analysis, discriminative analysis) yielded more differentiated information. The "Scale for depression depth measurements" was found to be of particular diagnostic relevance; it was standardized for the time being.  相似文献   
919.
920.
Recipient's mood, relationship type, and helping   总被引:6,自引:0,他引:6  
We conducted two studies to examine how a potential helper is affected by having a communal orientation toward a relationship with a potential recipient and by the potential recipient's sadness. We hypothesized that (a) having a communal orientation would increase helping and that (b) people high in communal orientation, but not others, would respond to a potential recipient's sadness by increasing helping. These hypotheses were tested in two studies. In Study 1, individual differences in communal orientation toward relationships were measured by using a new communal orientation scale reported for the first time in this article. In Study 2, manipulations were used to lead subjects to desire either a communal or an exchange relationship with another person. In both studies, subjects were exposed to a sad person or to a person in a neutral mood whom they were given a chance to help. As hypothesized, in both studies communally oriented subjects helped the other significantly more than did others. Also as hypothesized, in both studies communally oriented subjects but not others, increased helping in response to the other person's sadness although this effect reached statistical significance only in the second study.  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