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   26681篇
  免费   1107篇
  国内免费   15篇
  27803篇
  2021年   239篇
  2020年   328篇
  2019年   376篇
  2018年   614篇
  2017年   621篇
  2016年   621篇
  2015年   449篇
  2014年   503篇
  2013年   2396篇
  2012年   995篇
  2011年   1023篇
  2010年   623篇
  2009年   519篇
  2008年   796篇
  2007年   792篇
  2006年   678篇
  2005年   632篇
  2004年   527篇
  2003年   520篇
  2002年   552篇
  2001年   793篇
  2000年   777篇
  1999年   578篇
  1998年   238篇
  1996年   240篇
  1995年   215篇
  1992年   476篇
  1991年   460篇
  1990年   446篇
  1989年   421篇
  1988年   440篇
  1987年   389篇
  1986年   394篇
  1985年   397篇
  1984年   321篇
  1983年   285篇
  1979年   363篇
  1978年   262篇
  1977年   216篇
  1976年   211篇
  1975年   286篇
  1974年   364篇
  1973年   375篇
  1972年   297篇
  1971年   288篇
  1970年   286篇
  1969年   257篇
  1968年   357篇
  1967年   315篇
  1966年   291篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
14.
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR.  相似文献   
15.
16.
17.
18.
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   
19.
20.
This study examined information communication technologies and workplace friendship dynamics. Employees reported factors that influenced their initiation of friendship with a coworker and reported patterns and perceptions of communication with their workplace friend via different communication methods. Results indicated that personality, shared tasks, and perceived similarity are the most important factors to coworker friendship initiation, and the importance of physical proximity to workplace friendship is diminishing in the electronically connected workplace. Results confirm the primacy of face‐to‐face interaction for workplace friendship initiation and maintenance. E‐mail, phone, and texting were also central to communication among workplace friends. The amount of time spent telecommuting affected workplace friendship initiation and communication. Finally, generational differences were identified with respect to Internet‐based communication methods.  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