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   4872篇
  免费   889篇
  国内免费   564篇
  2024年   23篇
  2023年   239篇
  2022年   156篇
  2021年   202篇
  2020年   392篇
  2019年   374篇
  2018年   356篇
  2017年   382篇
  2016年   342篇
  2015年   229篇
  2014年   273篇
  2013年   767篇
  2012年   256篇
  2011年   189篇
  2010年   107篇
  2009年   142篇
  2008年   144篇
  2007年   160篇
  2006年   187篇
  2005年   194篇
  2004年   144篇
  2003年   121篇
  2002年   126篇
  2001年   83篇
  2000年   75篇
  1999年   83篇
  1998年   74篇
  1997年   55篇
  1996年   37篇
  1995年   51篇
  1994年   48篇
  1993年   35篇
  1992年   38篇
  1991年   26篇
  1990年   13篇
  1989年   11篇
  1988年   11篇
  1987年   14篇
  1986年   20篇
  1985年   26篇
  1984年   18篇
  1983年   7篇
  1982年   13篇
  1981年   11篇
  1980年   13篇
  1979年   15篇
  1978年   11篇
  1977年   14篇
  1976年   10篇
  1975年   7篇
排序方式: 共有6325条查询结果,搜索用时 15 毫秒
281.
In the popular folklore three-score-years-and-ten is treated as a fair innings for people, and thereby serves as an informal reference point for judgements about distributive justice within a community. But length of life alone is an insufficient basis for such judgements - a person's health-related quality-of-life also needs to be taken into account. If one of the objectives of public policy is to reduce inequalities in lifetime health, it will be demonstrated that this is very likely to require systematic discrimination against the older members of a community. The notion of community solidatity will also be tested, because a decision will need to be made as to whether the same fair innings applies to all members of the community, or whether some are entitled to more than others. The strength of the fair innings principle is that it brings these issues to the fore in a systematic way which should ais their resolition in a practical context.  相似文献   
282.
The advent of cloning animals has created a maelstrom of social concern about the ethical issues associated with the possibility of cloning humans. When the ethical concerns are clearly examined, however, many of them turn out to be less matters of rational ethics than knee-jerk emotion, religious bias, or fear of that which is not understood. Three categories of real and spurious ethical concerns are presented and discussed: 1) that cloning is intrinsically wrong, 2) that cloning must lead to bad consequences, and 3) that cloning harms the organism generated. The need for a rational ethical framework for discussing biotechnological advances is presented and defended.  相似文献   
283.
Local Solidarity     
In this article I am particularly interested in the question of solidarity within the boundaries of one's own country. I discuss a qualified beneficence requirement, which claims that we ought to prevent something very bad from happening if it is in our power and if we can do it without sacrificing anything morally significant. I also discuss a fair-share principle, according to which, in Liam B. Murphy's version, "the sacrifice each agent is required to make is limited to the level of sacrifice that would be optimal if the situation were one of full compliance". I argue that the qualified beneficence requirement is reasonable only in the proximity of the one who needs help. When there is no proximity we ought to be guided by a fair-share principle. I also argue that there is an intimate relation between the fair-share principle and the welfare-state ideology.  相似文献   
284.
俞国良 《心理科学》1999,22(5):389-393
从2308名10—15岁儿童中选取429名被试的研究结果表明.一般儿童的家庭心理环境、父母教养方式大大优于学习不良儿童,这些家庭资源与学习不良儿童的社会交往、自我概念和社会行为等有着密切的联系,说明家庭心理环境、父母教养方式对学习不良儿童社会性发展产生着重要作用。  相似文献   
285.
Symptoms and outcome in schizophrenia are heterogeneous. Part of the variation in outcome might be due to the coexistence of other forms of psychopathology. In the present study the prevalence of personality disorders in a group of recovered and non-recovered schizophrenia patients was focused to examine the prognostic implications of comorbidity for the outcome of the disorder. The results showed no significant differences in prevalence of personality disorders in the two groups at first admission to the hospital, but the difference at the time of interview was close to significance. Emotional and conduct difficulties in adolescence were significantly more prevalent in the non-recovered group. Schizoid features and emotional and conduct disorders in childhood were also more often reported among the non-recovered subjects. The results confirm that comorbidity contributes to the variation in outcome for schizophrenia patients, but does not confirm its prognostic significance.  相似文献   
286.
We examined 5-month-olds’ responses to adult facial versus vocal displays of happy and sad expressions during face-to-face social interactions in three experiments. Infants interacted with adults in either happy-sad-happy or happy-happy-happy sequences. Across experiments, either facial expressions were present while presence/absence of vocal expressions was manipulated or visual access to facial expressions was blocked but vocal expressions were present throughout. Both visual attention and infant affect were recorded. Although infants looked more when vocal expressions were present, they smiled significantly more to happy than to sad facial expressions regardless of presence or absence of the voice. In contrast, infants showed no evidence of differential responding to voices when faces were obscured; their smiling and visual attention simply declined over time. These results extend findings from non-social contexts to social interactions and also indicate that infants may require facial expressions to be present to discriminate among adult vocal expressions of affect.  相似文献   
287.
Hiroko Tanaka 《Human Studies》1999,22(2-4):363-395
This paper employs conversation analysis to examine the inter-connection between grammar and displays of contextual understanding, social identity, and social relationships as well as other activities clustering around turn-endings in Japanese talk-in-interaction, while undertaking a restricted comparison with the realisation of similar activities in English. A notable feature of turn-endings in Japanese is the particular salience of grammatical construction on the interactional activities they accomplish. Complete turns which are also syntactically complete are shown to be associated with the explicit display of contextual features, whereas syntactically incomplete turns are designed to circumvent or minimise such displays. The explicit or implicit display of one's social and contextual relationship to the interactional environment is therefore seen to be an integral part of the performance of social actions in Japanese. On the other hand, in English, it is more difficult to establish a clear association between grammar and the inclusion or avoidance of contextual displays.  相似文献   
288.
English independent schools are not required to follow government statutory guidance in a number of aspects including career education and guidance, and yet many are actively engaged in careers work and this has caught the attention of policymakers. State schools are subject to statutory guidance but, according to Ofsted and other authorities, the majority fail to adequately support young people through their post-school transitions. Using evidence from five English independent schools, the type of provision they offer is analysed against benchmarks of good practice to identify where their support is focussed. The factors that shape the resourcing and design of career education and guidance in the five schools are also explored. The extent to which the practices observed in the case studies can be replicated in all, or a sub-set of state schools, is discussed in the light of policy influence of independent schools.  相似文献   
289.
In this article, the author suggests that Hip‐Hop culture and rap music, in particular, can be integrated into individual counseling interactions with Black male clients to discuss the social injustices (e.g., hypercriminalization) they face. Literature examining the history of Hip‐Hop culture and how rap music has been used therapeutically with Black males is presented. The article concludes with a vignette illustrating how Elligan's ( 2000 ) rap therapy framework can help explore experiences Black male clients encounter.  相似文献   
290.
This research uses a combination of text mining, co-word analysis, and social network analysis (SNA) to review 132 international sales and sales management (ISSM) articles published between 1980 and 2017. The study provides a unique view of the past and future of ISSM research and provides three principal contributions. First, from a social network–analytic perspective, it offers a unique examination of the ways ISSM research topics are interconnected, as reflected by keyword network structure. Second, by conducting SNA across two periods (1980–1999 and 2000–2017) and examining the changes in network centrality measures, the study offers initial insights into the evolving nature of the ISSM literature. Third, the study reports keyword network disconnections (i.e., structural holes) to propose a fruitful agenda for future ISSM research. Taken together, this research offers a current perspective of the ISSM research domain's evolving nature.  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