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   184117篇
  免费   8163篇
  国内免费   155篇
  2020年   2786篇
  2019年   3447篇
  2018年   3749篇
  2017年   4113篇
  2016年   4776篇
  2015年   3938篇
  2014年   4798篇
  2013年   23442篇
  2012年   5083篇
  2011年   4331篇
  2010年   4106篇
  2009年   4894篇
  2008年   4429篇
  2007年   3971篇
  2006年   4431篇
  2005年   4303篇
  2004年   3872篇
  2003年   3456篇
  2002年   3247篇
  2001年   4030篇
  2000年   3777篇
  1999年   3552篇
  1998年   2883篇
  1997年   2700篇
  1996年   2628篇
  1995年   2453篇
  1994年   2418篇
  1993年   2374篇
  1992年   2921篇
  1991年   2732篇
  1990年   2571篇
  1989年   2480篇
  1988年   2443篇
  1987年   2410篇
  1986年   2426篇
  1985年   2668篇
  1984年   2659篇
  1983年   2409篇
  1982年   2406篇
  1981年   2367篇
  1980年   2219篇
  1979年   2360篇
  1978年   2264篇
  1977年   2212篇
  1976年   2021篇
  1975年   2099篇
  1974年   2190篇
  1973年   2070篇
  1972年   1666篇
  1971年   1606篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
341.
342.
343.
344.
We carried out a randomized controlled trial to determine whether an intensive intervention after a suicide attempt could decrease by half the risk of a repeat attempt in the following two years. After initial assessment and randomization, experimental subjects attended 18 therapy appointments over one year, including one home visit, and measures to improve attendance. Control subjects received the usual care. Of 63 experimental subjects, 35% made a repeat attempt, and so did 30% of 63 control subjects. The study had a 99% power to detect the desired decrease of risk (30% to 15%). Clearly, the intervention did not achieve its objective.  相似文献   
345.
Developing readers often make anagrammatical errors (e.g. misreading pirates as parties), suggesting they use letter position flexibly during word recognition. However, while it is widely assumed that the occurrence of these errors decreases with increases in reading skill, empirical evidence to support this distinction is lacking. Accordingly, we compared the performance of developing child readers (aged 8–10 years) against the end‐state performance of skilled adult readers in a timed naming task, employing anagrams used previously in this area of research. Moreover, to explore the use of letter position by developing readers and skilled adult readers more fully, we used anagrams which, to form another word, required letter transpositions over only interior letter positions, or both interior and exterior letter positions. The patterns of effects across these two anagram types for the two groups of readers were very similar. In particular, both groups showed similarly slowed response times (and developing readers increased errors) for anagrams requiring only interior letter transpositions but not for anagrams that required exterior letter transpositions. This similarity in the naming performance of developing readers and skilled adult readers suggests that the end‐state skilled use of letter position is established earlier during reading development than is widely assumed.  相似文献   
346.
347.
Abstract

This study builds on and extends previous sales leadership research by exploring sales professionals’ perceptions of effective leadership behaviors. Semistructured interviews with both sales leaders and salespeople working in a global enterprise software company were examined through a qualitative analysis. Results indicated that participants believed sales leadership played an important role in influencing sales performance. When asked to describe specific sales leader behaviors that best enable salesperson performance, sales professionals – both sales leaders and salespeople – overwhelmingly referenced coaching, followed by collaborating, championing, and customer engaging. We define and describe these four key sales leader behaviors and identify four potential mediating variables (trust, confidence, optimism, and resilience), from which emerges a conceptual framework of sales leader behaviors perceived to enable salesperson performance. We examine these four key sales leader behaviors and mediators in the broader context of leadership theory, particularly transformational, servant, authentic, and adaptive leadership theories. The key contribution of this study is the identification of a set of leader behaviors that are likely to be especially effective in modern sales organizations given that they originated from the perceptions of sales professionals themselves.  相似文献   
348.
349.
There is an apparent tension in our everyday moral responsibility practices. On the one hand, it is commonly assumed that moral responsibility requires voluntary control: an agent can be morally responsible only for those things that fall within the scope of her voluntary control. On the other hand, we regularly praise and blame individuals for mental states and conditions that appear to fall outside the scope of their voluntary control, such as desires, emotions, beliefs, and other attitudes. In order to resolve this apparent tension, many philosophers appeal to a tracing principle to argue that agents are morally responsible (only) for those attitudes whose existence can be traced back, causally, to a voluntary action or omission in the past. My aim in this article is to critically evaluate this tracing strategy and to argue that it gives us a misguided picture of when and why we are morally responsible for our attitudes. I argue that we should accept a ‘judgment sensitivity’ condition of moral responsibility rather than a ‘voluntary control’ condition, and defend this account against various objections.  相似文献   
350.
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