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   22231篇
  免费   122篇
  2024年   2篇
  2023年   36篇
  2022年   30篇
  2021年   39篇
  2020年   74篇
  2019年   75篇
  2018年   3568篇
  2017年   2888篇
  2016年   2332篇
  2015年   251篇
  2014年   136篇
  2013年   293篇
  2012年   720篇
  2011年   2535篇
  2010年   2618篇
  2009年   1499篇
  2008年   1815篇
  2007年   2275篇
  2006年   142篇
  2005年   275篇
  2004年   198篇
  2003年   150篇
  2002年   94篇
  2001年   38篇
  2000年   82篇
  1999年   32篇
  1998年   28篇
  1997年   25篇
  1996年   14篇
  1995年   4篇
  1994年   7篇
  1993年   5篇
  1992年   6篇
  1991年   7篇
  1990年   11篇
  1989年   7篇
  1988年   4篇
  1987年   2篇
  1985年   3篇
  1984年   4篇
  1983年   4篇
  1982年   2篇
  1981年   2篇
  1978年   2篇
  1976年   2篇
  1974年   4篇
  1970年   2篇
  1969年   2篇
  1965年   1篇
  1956年   2篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
21.
22.
23.
Conclusion The distinction between deontic focus and deontic circumstance is obvious and essential to the understanding of our reasonings about obligations, permissions, rights, and wrongs. Here we have dealt with the basics. These basics must be developed into a full deontic logic. Fortunately, such a comprehensive deontic logic that includes identity, quantification over individuals, and quantification over properties has already been proposed, and applied to the interpretation of legal texts. It should be an excellent basis for Feldman's intriguing and promising idea of world utilitarianism.  相似文献   
24.
25.
26.
The effects on aggressive behavior, open-field activity, and pain threshold of bilateral microinjections of serotonin (20 micrograms) and quipazine (20 micrograms), the direct serotonergic receptor agonist, into the cortico-medial amygdala were investigated in Wistar rats. Both drugs significantly prolonged the attack latency in isolated killer rats (predatory aggression model), and suppressed the incidence of aggressive postures/attacks in shock-induced fighting test (affective aggression). The only difference in the open-field behavior was the lower number of central square entries in drug-treated compared to saline-injected rats. None of the substances produced any significant change in jump threshold. It is concluded that stimulation of serotonin receptors within the amygdala produces inhibition of affective and muricidal behavior in isolated rats. The effect does not seem to be dependent on changes in general activity and pain sensitivity.  相似文献   
27.
A 47-year-old man with a left temporo-occipital infarct in the area of the posterior cerebral artery is presented. The neuropsychological examination did not reveal aphasia or gross mental deficits. The patient presented with alexia without agraphia, color agnosia, but few visual perceptual deficits. The main impairment was in confrontation naming; he was incapable of naming objects and pictures, not from lack of recognition (excluding visual agnosia) but from lack of access to the appropriate word (optic aphasia). The patient also exhibited a deficit in the evocation of gesture from the visual presentation of an object (optic apraxia) and a difficulty in "conjuring up" visual images of objects (impaired visual imagery) and loss of dreams. The fundamental deficit of this patient is tentatively explained in terms of visuoverbal and visuogestural disconnection and a deficit of mental imagery.  相似文献   
28.
Conclusion Tomberlin's comparative claims about the superiority of the De Dicto-De Re Account over Guise Theory concerning referential opacity are abortively premature. Nevertheless, he may be right. Yet the order of the day is to develop the De Re-De Dicto Account to the hilt. Not until this is done can any useful dia-philosophical comparison of the two theories yield any fruit. My deep desire is, of course, for the sheer enjoyment of experiencing the world from the perspective of each of the two views, indeed, from the perspective of other views — e.g., Frege's Sense/Referent Theory — that can be developed to the same data-encompassing stage as Guise Theory.  相似文献   
29.
COVID-19 pandemic led to introduction of lockdown measures in many countries, while in Serbia the Government also introduced the curfew by which vulnerable groups of citizens were prohibited from leaving their homes at any time. In such a situation many citizens organized to voluntarily offer their help to those in isolation, which offered a unique opportunity to examine prosocial behavior in the natural setting of global crisis. This study examined the differences between non-helpers and helpers, as well as groups of helpers who provided their help to close or unknown others, in personality (prosocial tendencies, selfishness and communal narcissism) and context-related factors (situation specific empathy and fear) of prosocial behaviors. Additionally, the study also analyzed the helping-related affect among helpers, depending on the recipient of help and personality characteristics. Results revealed that groups of helpers with different recipients of help (close persons, unknown persons or both) were not different among each other, but they were different from non-helpers. Non-helpers were more selfish and had self-focused prosocial tendencies, and they showed less empathy towards people in isolation, compared to helper groups. However, the helping-related affect depended on the recipient of help and helper's personality traits. This study confirmed some previous findings and offered novel insights into factors related to helping in crises.  相似文献   
30.
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