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   188038篇
  免费   8357篇
  国内免费   156篇
  2020年   2780篇
  2019年   3446篇
  2018年   3660篇
  2017年   4105篇
  2016年   4705篇
  2015年   3929篇
  2014年   4806篇
  2013年   23451篇
  2012年   4978篇
  2011年   4284篇
  2010年   4091篇
  2009年   4855篇
  2008年   4416篇
  2007年   4043篇
  2006年   4489篇
  2005年   4391篇
  2004年   3878篇
  2003年   3468篇
  2002年   3333篇
  2001年   4044篇
  2000年   3908篇
  1999年   3654篇
  1998年   2891篇
  1997年   2726篇
  1996年   2641篇
  1995年   2455篇
  1994年   2415篇
  1993年   2387篇
  1992年   3039篇
  1991年   2845篇
  1990年   2686篇
  1989年   2547篇
  1988年   2534篇
  1987年   2522篇
  1986年   2557篇
  1985年   2754篇
  1984年   2749篇
  1983年   2496篇
  1982年   2443篇
  1981年   2416篇
  1980年   2246篇
  1979年   2525篇
  1978年   2327篇
  1977年   2244篇
  1976年   2049篇
  1975年   2234篇
  1974年   2311篇
  1973年   2244篇
  1972年   1830篇
  1971年   1726篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
271.
272.
273.
274.
275.
276.
Recent studies demonstrating that multiple meanings of an ambiguous word are initially accessed even when only one reading is syntactically appropriate with the preceding context can be criticized on at least two grounds. First, many of the syntactic contexts used were not truly restrictive, and, secondly, subjects may not have had time to integrate the context before processing the ambiguous word. In the present study, subjects listened to a sentence ending in an ambiguous word and then made a lexical decision to a target related to either the appropriate or inappropriate reading. Contexts were completely restrictive, and a pause was introduced between the context and the ambiguous word. Multiple access still obtained, providing further support for the claim that lexical access is not guided by syntactic context.  相似文献   
277.
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   
278.
279.
280.
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