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   36970篇
  免费   752篇
  国内免费   7篇
  2020年   213篇
  2019年   224篇
  2018年   3756篇
  2017年   3063篇
  2016年   2533篇
  2015年   443篇
  2014年   379篇
  2013年   1327篇
  2012年   1132篇
  2011年   2891篇
  2010年   2822篇
  2009年   1793篇
  2008年   2161篇
  2007年   2653篇
  2006年   456篇
  2005年   626篇
  2004年   527篇
  2003年   421篇
  2002年   416篇
  2001年   721篇
  2000年   734篇
  1999年   481篇
  1998年   202篇
  1997年   186篇
  1996年   185篇
  1995年   151篇
  1994年   150篇
  1992年   377篇
  1991年   345篇
  1990年   363篇
  1989年   305篇
  1988年   290篇
  1987年   285篇
  1986年   259篇
  1985年   261篇
  1984年   241篇
  1983年   205篇
  1982年   156篇
  1979年   223篇
  1978年   174篇
  1975年   190篇
  1974年   230篇
  1973年   229篇
  1972年   183篇
  1971年   180篇
  1970年   148篇
  1969年   177篇
  1968年   210篇
  1967年   191篇
  1966年   156篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
291.
It is suggested that molar streams of behavior are constructed of various arrangements of three elementary constituents (elicited, evoked, and emitted response classes). An eight-cell taxonomy is elaborated as a framework for analyzing and synthesizing complex behavioral repertoires based on these functional units. It is proposed that the local force binding functional units into a smoothly articulated kinetic sequence arises from temporally arranged relative response probability relationships. Behavioral integration is thought to reflect the joint influence of the organism's hierarchy of relative response probabilities, fluctuating biological states, and the arrangement of environmental and behavioral events in time.  相似文献   
292.
In previous studies subjects who have learned a positioning response with kinesthetic feedback tended to make greater errors when visual feedback was provided during later trials. These subjects have always performed with both kinesthetic and visual feedback available. This study determined whether subjects with only visual feedback would produce errors similar to those who received kinesthetic plus visual feedback. Blindfolded subjects learned to move a handle to a criterion location with knowledge of results following each trial. Subjects then were assigned to one of three experimental groups, with only kinesthetic feedback, with kinesthetic plus visual feedback, or with only visual feedback. Subjects had 9 trials without knowledge of results in these feedback conditions. When visual feedback was available, subjects tended to make longer response errors. This finding replicates previous studies. Also, the similarity of performances from the conditions with visual feedback indicated the dominance of visual information in the condition with kinesthetic plus visual feedback.  相似文献   
293.
The comparable worth controversy has generated much discussion about the appropriate valuation of job worth. To date, academic inquiries into the measurement of job worth have focused primarily on job evaluation; however, recent court decisions suggest that market wages are a more compelling indicator of job worth than are job evaluation results. This paper examines the construct of "market wage" and the process by which it is measured (wage surveys). It is argued that both the construct and the measurement of the market wage have not been sufficiently examined by either academics or the courts. Implications for pay administration and future research are noted.  相似文献   
294.
Based on 2130 autopsies with a hypertension it is reported on the hypertensive CNS-lesions. The frequency of encephalomalacia was 12%. By 9.7% was founded brain haemorrhages. The relapse rate of haemorrhages was about 5%. The encephalomalacia existed by way of secondary finding in 24.7%, and the haemorrhage in 2.2%. The investigations showed an important arteriosclerosis by 39.8% in haemorrhages and by 51.6% in brain infarct. It was remarkable by the hypertensive brain haemorrhages a dominant right hemisphere.  相似文献   
295.
296.
297.
Varieties of perceptual independence   总被引:6,自引:0,他引:6  
  相似文献   
298.
299.
300.
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