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   5929篇
  免费   173篇
  国内免费   3篇
  2019年   54篇
  2018年   110篇
  2017年   87篇
  2016年   83篇
  2015年   65篇
  2014年   74篇
  2013年   449篇
  2012年   171篇
  2011年   160篇
  2010年   83篇
  2009年   98篇
  2008年   136篇
  2007年   152篇
  2006年   132篇
  2005年   126篇
  2004年   123篇
  2003年   103篇
  2002年   117篇
  2001年   214篇
  2000年   205篇
  1999年   142篇
  1998年   56篇
  1996年   59篇
  1993年   54篇
  1992年   118篇
  1991年   120篇
  1990年   117篇
  1989年   99篇
  1988年   89篇
  1987年   97篇
  1986年   108篇
  1985年   105篇
  1984年   95篇
  1983年   82篇
  1981年   53篇
  1979年   95篇
  1978年   70篇
  1977年   62篇
  1976年   54篇
  1975年   67篇
  1974年   92篇
  1973年   100篇
  1972年   72篇
  1971年   69篇
  1970年   80篇
  1969年   75篇
  1968年   106篇
  1967年   82篇
  1966年   93篇
  1958年   62篇
排序方式: 共有6105条查询结果,搜索用时 15 毫秒
201.
202.
This paper considers the question: what becomes of the notion of a logic as a way of codifying valid arguments when the customary assumption is dropped that the premisses and conclusions of these arguments are statements from some single language? An elegant treatment of the notion of a logic, when this assumption is in force, is that provided by Dana Scott's theory of consequence relations; this treatment is appropriately generalized in the present paper to the case where we do not make this assumption of linguistic homogeneity. Several applications of the resulting concept of a heterogeneous logic are suggested, but the main emphasis is on the formal development. One topic touched on is a certain contrast between the boolean and the intensional sentence-connectives in this more general setting.  相似文献   
203.
Employed qualitative methods to examine the role of the family in the academic success of very high-achieving African American males. Findings revealed a complex tapestry of family processes and contexts involved in each youth's journey to outstanding academic achievement. Specifically, the combined importance of parental-determined academic engagement, strict discipline, nurturance, and community connectedness appeared to counteract potentially negative contextual influences of neighborhood, peers, schools, and society. The qualitative findings tell a multifaceted, rich, and compelling story of the pathways to academic success for Black males, and highlight the need for culture-specific and ecologically based conceptualization, research, and intervention approaches.  相似文献   
204.
Recent investigations have explored dispositional optimism as a determinant of various health-related behaviors, though such research has been infrequently conducted in populations where pessimism would be expected to be prevalent. The present study examines optimism and unsafe sexual behavior in 230 sexually active inner-city minority adolescents. Findings suggest that dispositional optimism is a protective factor regarding adolescents' intentions to avoid engaging in unsafe sex. Further, the benefits of optimism appear to be explained by those who are more optimistic having higher levels of perceived condom use self-efficacy and stronger negative expectancies toward unsafe sex. Future interventions may need to address optimism in concert with behavioral-specific determinants to increase the probability of reducing unsafe sexual behavior in high-risk populations.  相似文献   
205.
Levels and correlates of parental support, peer support, partner support, and/or spiritual support among African American and Caucasian youth were examined in three contexts: adolescent pregnancy (Study 1), first year of college (Study 2), and adolescence and young adulthood (ages 15–29; Study 3). Partially consistent with a cultural specificity perspective, in different contexts different support sources were higher in level and/or more strongly related to adjustment for one ethnic group than the other. Among pregnant adolescents, levels of spiritual support were higher for African Americans than Caucasians; additionally, peer support was positively related to well-being only for African Americans whereas partner support was positively related to well-being only for Caucasians. Among college freshmen, family support was more strongly related to institutional and goal commitment for African Americans than Caucasians; conversely, peer support was more strongly related to institutional and goal commitment among Caucasians. Among 15 to 29-year-olds, levels of parental support and spiritual support were higher among African Americans than Caucasians; additionally, spiritual support was positively related to self-esteem for African Americans but not for Caucasians. Implications and limitations of the research are discussed. The third study was supported by National Institute of Mental Health Grant RO1 MH40963. We thank Monica Greene, Shea Lyda, Wendy Stevenson, and the many undergraduate students who contributed to the three research projects. We also acknowledge the very thoughtful and helpful comments of the anonymous reviewers and the editor, Edison Trickett.  相似文献   
206.
It is argued that while counsellors have adopted the principle tenets of phenomenology—consciousness and meaning—they have built their work on an interpretation of intuition which is contrary to phenomenological rationale and presents it as a form of knowing which is esoteric and mystical. Phenomenologically, intuition differs from no other way in which sense is made of the world. Intuitions should then, in principle, be accessible to conscious understanding so as to allow counsellors to reflect (cognitively?) on their practice. If the process of intuition were really unknowable, then reflective practice in counselling would not be possible.  相似文献   
207.
The Khalidi Library in Jerusalem contains a number of valuable works pertaining to Muslim‐Christian relations during the Ottoman period, and in this paper an effort is made to elucidate one such text, a unique anonymous essay entitled Al‐risala al‐sabiciyya fi ibtal al‐diyana al‐yahūdiyya. As the title suggests, the essay presents itself as a work of a Jewish convert to Islam; pressed to justify what he has done, he gives seven reasons for his conversion, and then lists two sets of seven similarities and differences between Islam and Judaism that have also served to encourage his conversion.

In this paper it is argued that the essay is actually the work of a Christian convert, probably one who wrote in Jerusalem in the late nineteenth century. Seeking to justify his conversion, but hesitant to reject openly the central doctrines of Christianity, he pretends to be a Jewish convert and argues for the superior position of Islam among the three monotheistic faiths. This tactic, while uncommon, is known from other parts of the Near East, and a convert in Jerusalem would have been in an excellent position to become aware of such writings.

While most of his arguments are familiar from the arsenal deployed in disputations of the past, this author's essay is valuable for its illustration of the hesitation and doubt that must have accompanied most acts of conversion, and for the way in which it draws attention to the fact that Christian—Muslim relations—especially in Jerusalem—have always proceeded within the broader context of relations. among the three great monotheistic religions in general.  相似文献   

208.
Few British organizations utilize handwriting analysis for personality assessment, but in some European countries handwriting analysis is extremely popular. Research has examined the reliability and validity of both methods of assessment, but few studies have directly compared the two. In this study, the personality of 120 subjects was assessed by the Cattell 16PF and by handwriting analysis. Each subject was presented with five handwriting analysis textual reports and five personality textual reports (one of each being their own) and asked to rank order each set in terms of perceived accuracy. The same ranking process was undertaken by each respondent's social partner. The results demonstrated that handwriting reports were ranked at a chance level by Self and by Other and that personality reports were ranked at a well above chance level by Self and by Other. Self-rankings were more accurate than Other-rankings.  相似文献   
209.
210.
The Human Genome Project has raised many issues regarding the contributions of genetics to a variety of diseases and societal conditions. With genetic testing now easily conducted with lowered costs in nonmedical domains, a variety of privacy issues must be considered. Such testing will result in the loss of significant privacy rights for the individual. Society must now consider such issues as the ownership of genetic data, confidentiality rights to such information, limits placed on genetic screening, and legislation to control genetic testing and its applications. There is often a conflict between individual rights to privacy and the need for societal protection.  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