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   33481篇
  免费   1396篇
  国内免费   70篇
  34947篇
  2020年   331篇
  2019年   457篇
  2018年   584篇
  2017年   613篇
  2016年   619篇
  2015年   436篇
  2014年   561篇
  2013年   2456篇
  2012年   1010篇
  2011年   1085篇
  2010年   644篇
  2009年   640篇
  2008年   952篇
  2007年   923篇
  2006年   869篇
  2005年   782篇
  2004年   765篇
  2003年   676篇
  2002年   718篇
  2001年   1028篇
  2000年   941篇
  1999年   721篇
  1998年   392篇
  1997年   324篇
  1996年   316篇
  1992年   552篇
  1991年   545篇
  1990年   534篇
  1989年   542篇
  1988年   532篇
  1987年   502篇
  1986年   529篇
  1985年   575篇
  1984年   459篇
  1983年   433篇
  1982年   360篇
  1981年   344篇
  1979年   522篇
  1978年   386篇
  1976年   360篇
  1975年   434篇
  1974年   489篇
  1973年   508篇
  1972年   411篇
  1971年   383篇
  1970年   378篇
  1969年   408篇
  1968年   488篇
  1967年   422篇
  1966年   422篇
排序方式: 共有10000条查询结果,搜索用时 6 毫秒
31.
A growing literature has observed a significant reduction in pain sensitivity among hypertensive animals and humans. It is uncertain whether a reduced sensitivity to pain can be observed in nonnotensive individuals who go on to develop high blood pressure. Blood pressure (BP) was reassessed in one hundred fifteen 19-year-old boys initially tested at age 14, when they were also presented with a pain stimulus (mechanical finger pressure). Hierarchical regression analyses indicated that information regarding pain tolerance improved prediction of changes in systolic and diastolic blood pressure beyond that afforded by differences in BP at age 14, parental history of hypertension, and body mass index. These analyses suggest that pain sensitivity may be associated with physiological processes involved in the development of sustained high blood pressure.  相似文献   
32.
Suicides among older adults in the United States and Canada in the last decade have accounted for an increasing share of all suicides. In both countries the use of firearms among older adults has steadily increased. Despite these trends, little is known about the extent to which crisis centers are prepared to prevent elder suicide. A survey of AAS-listed crisis prevention centers examined the training, knowledge, and current practices relevant to elder suicide among personnel in 321 crisis prevention centers in both countries. Results revealed insufficient training, a lack of familiarity with recent suicide trends, and limited outreach to older adults.  相似文献   
33.
34.
35.
36.
37.
38.
39.
While previous research has mainly emphasised the importance of leader–member exchange (LMX) to job satisfaction, there is a lack of research on reciprocal relationships between job satisfaction and LMX. In this study, we not only suggest that good LMX increases job satisfaction, but that job satisfaction can also enhance high‐quality supervisor–employee relationships. A full cross‐lagged panel analysis was used to test reciprocal relationships between LMX and job satisfaction. Employees (N= 279) of a large information technology company filled out questionnaires at two times, with a time lag of 3 months. In line with our predictions, findings revealed a positive relationship between LMX and job satisfaction both at Time 1 and Time 2. Moreover, LMX at Time 1 predicted the increase of job satisfaction at Time 2, and job satisfaction at Time 1 predicted the increase of LMX at Time 2. The results demonstrate the need to consider reciprocal relationships between job satisfaction and LMX when explaining employees' workplace outcomes. Our findings are discussed in terms of positive psychology theory.  相似文献   
40.
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