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   183958篇
  免费   8155篇
  国内免费   155篇
  2020年   2797篇
  2019年   3449篇
  2018年   3748篇
  2017年   4118篇
  2016年   4782篇
  2015年   3939篇
  2014年   4811篇
  2013年   23471篇
  2012年   5077篇
  2011年   4328篇
  2010年   4098篇
  2009年   4892篇
  2008年   4421篇
  2007年   3965篇
  2006年   4426篇
  2005年   4294篇
  2004年   3868篇
  2003年   3451篇
  2002年   3244篇
  2001年   4027篇
  2000年   3779篇
  1999年   3553篇
  1998年   2881篇
  1997年   2697篇
  1996年   2620篇
  1995年   2449篇
  1994年   2412篇
  1993年   2368篇
  1992年   2916篇
  1991年   2726篇
  1990年   2567篇
  1989年   2479篇
  1988年   2437篇
  1987年   2404篇
  1986年   2424篇
  1985年   2662篇
  1984年   2648篇
  1983年   2404篇
  1982年   2404篇
  1981年   2362篇
  1980年   2212篇
  1979年   2356篇
  1978年   2262篇
  1977年   2214篇
  1976年   2019篇
  1975年   2095篇
  1974年   2187篇
  1973年   2068篇
  1972年   1661篇
  1971年   1599篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
281.
282.
283.
284.
285.
286.
287.
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   
288.
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   
289.
290.
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