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   189684篇
  免费   8448篇
  国内免费   157篇
  2020年   2818篇
  2019年   3495篇
  2018年   3712篇
  2017年   4173篇
  2016年   4768篇
  2015年   3970篇
  2014年   4842篇
  2013年   23656篇
  2012年   5090篇
  2011年   4406篇
  2010年   4157篇
  2009年   4915篇
  2008年   4525篇
  2007年   4130篇
  2006年   4551篇
  2005年   4454篇
  2004年   3945篇
  2003年   3532篇
  2002年   3392篇
  2001年   4070篇
  2000年   3922篇
  1999年   3664篇
  1998年   2901篇
  1997年   2745篇
  1996年   2650篇
  1995年   2466篇
  1994年   2423篇
  1993年   2393篇
  1992年   3042篇
  1991年   2850篇
  1990年   2701篇
  1989年   2554篇
  1988年   2542篇
  1987年   2533篇
  1986年   2568篇
  1985年   2763篇
  1984年   2757篇
  1983年   2507篇
  1982年   2454篇
  1981年   2419篇
  1980年   2260篇
  1979年   2532篇
  1978年   2333篇
  1977年   2253篇
  1976年   2056篇
  1975年   2238篇
  1974年   2314篇
  1973年   2245篇
  1972年   1830篇
  1971年   1724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