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   45692篇
  免费   954篇
  国内免费   9篇
  2018年   3759篇
  2017年   3110篇
  2016年   2585篇
  2015年   456篇
  2014年   427篇
  2013年   1935篇
  2012年   1171篇
  2011年   3019篇
  2010年   2905篇
  2009年   1865篇
  2008年   2305篇
  2007年   2702篇
  2006年   580篇
  2005年   696篇
  2004年   656篇
  2003年   600篇
  2002年   565篇
  2001年   686篇
  2000年   701篇
  1999年   529篇
  1998年   284篇
  1997年   300篇
  1996年   292篇
  1995年   267篇
  1992年   497篇
  1991年   460篇
  1990年   461篇
  1989年   432篇
  1988年   446篇
  1987年   412篇
  1986年   462篇
  1985年   442篇
  1984年   392篇
  1983年   343篇
  1982年   258篇
  1981年   283篇
  1979年   410篇
  1978年   331篇
  1977年   293篇
  1976年   307篇
  1975年   354篇
  1974年   447篇
  1973年   477篇
  1972年   348篇
  1971年   372篇
  1970年   344篇
  1969年   379篇
  1968年   447篇
  1967年   414篇
  1966年   430篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
This research investigated the buffering role of social support in the relationship of work load to both tension-anxiety and coping for police radio dispatchers ( N = 60). Each dispatcher was observed throughout an entire 8-hour work shift by a trained observer. Objective load consisted of the hourly rate of incoming telephone calls, police radio transmissions, and face-to-face or written communications from superiors, co-workers, and others. At the end of each shift, measures were taken of dispatchers' perceived load, felt tension-anxiety, and coping actions. Hierarchical regression revealed that support from superiors moderated the effects of both objective and perceived loads; no main effects of support were found. Statistically significant interactions confirmed the hypothesized buffering role of support: under high perceived load, dispatchers with high social support engaged in more coping actions and felt less tension-anxiety than did low-support dispatchers. No differences were found when perceived load was low. Support also buffered effects of objective load on tension-anxiety but not on coping.  相似文献   
132.
133.
134.
W Lüders 《Psyche》1988,42(3):216-220
  相似文献   
135.
Observations on three children with neurolisteriosis (one case of meningitis, two cases of meningoencephalitis, each Serovar 4 b), show that even after the neonatal period, listeriosis must not be ignored in the process of diagnosis and therapy. It is the bacteriological examination of the cerebrospinal fluid, together with the blood culture, and not clinical symptoms and serology that guarantee a timely diagnosis and therapy (ampicillin and gentamicin).  相似文献   
136.
In the present study inquiries have been made about the changes EEG cross-correlation in mental activities is subject to. The EEG recordings were made at rest, in visual and acoustical response, when reading and in the solution of an acoustical differentiation problem. In conjunction with plain reflex processes a decline in the intrahemispherical correlation was observed. During complex-structured psycho-request situations dissimilar changes in the EEG correlation have occurred on the scalp. Between the cerebral regions functionally essential for the solution of the problems, an increase in the bio-electric correlation and between other cerebral areas a decline were registered. The findings in conclusion come to realize that the topographic EEG cross-correlation analysis is appropriate to give an insight into the present situation of cerebral functional organization.  相似文献   
137.
138.
139.
140.
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