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   41188篇
  免费   1611篇
  国内免费   27篇
  2020年   410篇
  2019年   484篇
  2018年   814篇
  2017年   825篇
  2016年   914篇
  2015年   667篇
  2014年   660篇
  2013年   3017篇
  2012年   1365篇
  2011年   1482篇
  2010年   750篇
  2009年   712篇
  2008年   966篇
  2007年   992篇
  2006年   868篇
  2005年   1994篇
  2004年   1355篇
  2003年   1110篇
  2002年   858篇
  2001年   1377篇
  2000年   1332篇
  1999年   964篇
  1998年   383篇
  1997年   358篇
  1996年   349篇
  1992年   785篇
  1991年   746篇
  1990年   771篇
  1989年   724篇
  1988年   700篇
  1987年   645篇
  1986年   686篇
  1985年   671篇
  1984年   531篇
  1983年   471篇
  1981年   328篇
  1979年   545篇
  1978年   405篇
  1977年   340篇
  1976年   327篇
  1975年   465篇
  1974年   594篇
  1973年   564篇
  1972年   488篇
  1971年   438篇
  1970年   429篇
  1969年   444篇
  1968年   544篇
  1967年   465篇
  1966年   466篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
171.
172.
173.
174.
175.
176.
Ratings of pre-morbid intelligence level, derived from the hospital charts of 26 chronic schizophrenics, were correlated with the post-mortem brain volume measures of cortex, white matter, central grey matter, and ventricles. Contrary to hypothesis, no significant correlations were found.  相似文献   
177.
A study was conducted with 104 hospital employees to assess the relationship between pay-for-performance perceptions and pay satisfaction. Unlike previous research examining this relationship, a multi-item measure of pay-for-performance perceptions and a multidimensional measure of pay satisfaction were used. As hypothesized, the results indicated a positive relationship between pay-for-performance perceptions and pay-raise satisfaction, pay-level satisfaction, and overall pay satisfaction even after the effects of salary level, salary increases, performance ratings, job tenure, job satisfaction, and promotions were controlled. The importance of gathering perceptual data on characteristics of the pay system believed to have differential relationships with the subdimensions of pay satisfaction are discussed.  相似文献   
178.
179.
180.
Stress in time     
The goals of this research were to determine whether speakers adjust the stress patterns of words within sentences to create an alternation between strong and weak beats and to explore whether this rhythmic alternation contributes to the characteristics stress differences between two major lexical categories of English. Two experiments suggested that speakers do alter lexical stress in accordance with rhythmic biases. When speakers produced disyllabic pseudowords in sentence contexts, they were more likely to place stress on the first syllable when the pseudoword was preceded by a weak stress and followed by a strong one than when the strong stress preceded and the weak followed. This occurred both when the pseudowords served as nouns and when they served as verbs. Text analyses further revealed that weakly stressed elements precede nouns more often than verbs, whereas such elements follow verbs more often than nouns. Thus, disyllabic nouns are more likely than disyllabic verbs to occupy contexts biased toward trochaic rhythm, a finding consistent with leftward dominant stress in disyllabic English nouns. The history of stress changes in English nouns and verbs also conforms with the view that rhythmic context may have contributed to the evolution of stress differences. Together, the findings suggest that the citation stress patterns of words may to some degree reflect adaptations of lexical knowledge to conditions of language performance.  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