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   182038篇
  免费   7952篇
  国内免费   168篇
  2021年   1554篇
  2020年   2880篇
  2019年   3553篇
  2018年   3773篇
  2017年   4188篇
  2016年   4859篇
  2015年   4016篇
  2014年   4921篇
  2013年   24005篇
  2012年   5118篇
  2011年   4264篇
  2010年   4194篇
  2009年   4951篇
  2008年   4427篇
  2007年   4010篇
  2006年   4538篇
  2005年   4436篇
  2004年   3881篇
  2003年   3525篇
  2002年   3335篇
  2001年   3480篇
  2000年   3297篇
  1999年   3308篇
  1998年   2883篇
  1997年   2729篇
  1996年   2616篇
  1995年   2483篇
  1994年   2430篇
  1993年   2376篇
  1992年   2730篇
  1991年   2523篇
  1990年   2424篇
  1989年   2277篇
  1988年   2276篇
  1987年   2284篇
  1986年   2255篇
  1985年   2456篇
  1984年   2581篇
  1983年   2368篇
  1982年   2401篇
  1981年   2378篇
  1980年   2223篇
  1979年   2287篇
  1978年   2231篇
  1977年   2181篇
  1976年   1991篇
  1975年   2068篇
  1974年   2123篇
  1973年   2012篇
  1972年   1548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.
Main clause phenomena (MCPs) are syntactic constructions that occur predominantly or exclusively in main clauses. I propose a processing explanation for MCPs. Sentence processing is easiest at the beginning of the sentence (requiring less search); this follows naturally from widely held assumptions about sentence processing. Because of this, a wider variety of constructions can be allowed at the beginning of the sentence without overwhelming the sentence‐processing mechanism. Unlike pragmatic and grammatical accounts of MCPs, the processing account predicts avoidance of MCPs in non‐initial main clauses (non‐initial coordinate clauses and premodified clauses). A corpus study supports these predictions, but it is somewhat inconclusive. A further corpus study examines another type of syntactic construction, premodifying adjunct phrases (“openers”); the prediction here is that less common types of opener will be especially avoided in non‐initial contexts. The prediction is confirmed, supporting the processing view of rare constructions.  相似文献   
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