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   185164篇
  免费   8209篇
  国内免费   155篇
  2020年   2803篇
  2019年   3481篇
  2018年   3803篇
  2017年   4164篇
  2016年   4828篇
  2015年   3962篇
  2014年   4845篇
  2013年   23569篇
  2012年   5166篇
  2011年   4425篇
  2010年   4134篇
  2009年   4931篇
  2008年   4492篇
  2007年   4038篇
  2006年   4476篇
  2005年   4346篇
  2004年   3926篇
  2003年   3495篇
  2002年   3287篇
  2001年   4048篇
  2000年   3790篇
  1999年   3571篇
  1998年   2890篇
  1997年   2705篇
  1996年   2621篇
  1995年   2455篇
  1994年   2421篇
  1993年   2374篇
  1992年   2926篇
  1991年   2734篇
  1990年   2568篇
  1989年   2480篇
  1988年   2441篇
  1987年   2409篇
  1986年   2426篇
  1985年   2664篇
  1984年   2651篇
  1983年   2407篇
  1982年   2407篇
  1981年   2367篇
  1980年   2214篇
  1979年   2355篇
  1978年   2266篇
  1977年   2211篇
  1976年   2020篇
  1975年   2102篇
  1974年   2195篇
  1973年   2072篇
  1972年   1666篇
  1971年   1602篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
291.
292.
293.
The purpose of this paper is to study the convergent validity of the four most widely used burnout measures in a sample of Chinese nurses (N= 717). First, Structural Equation Modeling was used to investigate the factor structure of scores produced by the Maslach Burnout Inventory‐General Survey (MBI‐GS), the Burnout Measure (BM), the Shirom‐Melamed Burnout Measure (SMBM), and the Oldenburg Burnout Inventory (OLBI). Next, several competing models were tested to investigate the convergent validity of these four burnout instruments. The final results suggest that burnout is best conceived of as a multidimensional construct consisting of exhaustion and withdrawal, which are two related but conceptually distinct aspects. In addition, positively phrased items should be dropped from burnout measures for they constitute a separate factor that is considered to be an artifact.  相似文献   
294.
295.
In Experiment 1, rats were trained on a discrimination between rubber- and sandpaper-covered arms of a maze after one group had been pre-exposed to these intra-maze cues. Pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made easier by adding further discriminative stimuli, when it now significantly retarded learning. In Experiment 2, rats were trained on an extra-maze spatial discrimination, again after one group, but not another, had been pre-exposed to the extra-maze landmarks. Here too, pre-exposure facilitated subsequent discrimination learning, unless the discrimination was made substantially easier by arranging that the two arms between which rats had to choose were always separated by 135°. The results of both experiments can be explained by supposing that perceptual learning depends on the presence of features common to S+ and S-.  相似文献   
296.
297.
298.
299.
In the first part I discuss the thesis, advanced by John Broome, that intentions are normatively required by all-things-considered judgments about what one ought to do. I endorse this thesis, but remain sceptical about Broome's programme of grounding the correctness of reasoning in formal relations between contents of mental states. After discussing objections to the thesis, I concentrate in the second part on the relation between rational action and rational intention. I distinguish between content-related and attitude-related reasons for propositional attitudes like believing, wanting, and intending something. The former appeal to features of the content of the propositional attitude they are reasons for, the latter would be reasons for a propositional attitude because of features of the propositional attitude as a whole, for example the feature of its being beneficial to believe or to want that p . I try to show that the common philosophical reaction to attitude-related reasons, namely to claim that they are merely content-related reasons in disguise, is mistaken. In its most extreme form such a reaction would fail to respect the first-person character of reasoning which manifests itself in, among other things, the fact that a Moore-sentence and its analogue for intentions cannot be a conclusion of reasoning. In the third part I argue that there are attitude-related reasons for intentions, and, in showing how they influence practical deliberation, I find that their existence can be rendered compatible with the thesis that it is rational to intend to do what one thinks one ought to do.  相似文献   
300.
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