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   2460篇
  免费   42篇
  国内免费   2篇
各国政治   47篇
工人农民   17篇
世界政治   312篇
外交国际关系   174篇
法律   1510篇
中国共产党   109篇
中国政治   111篇
政治理论   170篇
综合类   54篇
  2023年   5篇
  2020年   6篇
  2019年   7篇
  2018年   10篇
  2015年   6篇
  2014年   27篇
  2013年   11篇
  2012年   159篇
  2011年   183篇
  2010年   62篇
  2009年   46篇
  2008年   144篇
  2007年   174篇
  2006年   206篇
  2005年   194篇
  2004年   180篇
  2003年   165篇
  2002年   141篇
  2001年   127篇
  2000年   124篇
  1999年   64篇
  1998年   35篇
  1997年   18篇
  1996年   33篇
  1995年   40篇
  1994年   38篇
  1993年   21篇
  1992年   12篇
  1991年   16篇
  1990年   9篇
  1989年   12篇
  1988年   12篇
  1987年   10篇
  1986年   10篇
  1985年   13篇
  1984年   7篇
  1983年   16篇
  1982年   16篇
  1981年   15篇
  1980年   25篇
  1979年   14篇
  1978年   5篇
  1977年   6篇
  1976年   27篇
  1974年   4篇
  1964年   6篇
  1963年   4篇
  1962年   7篇
  1961年   4篇
  1959年   6篇
排序方式: 共有2504条查询结果,搜索用时 15 毫秒
891.
892.
893.
894.
895.
Nigeria has a large number of adolescents living and making a living on the streets. This has been attributed to economic factors and exposure to all forms of risks. The result is the proliferation of prostitution among the adolescents with its attendant problems. This article considers the different forms of adolescent prostitutes: those in brothels, street walkers, call girls, and casual, part-time, or floating prostitutes, as well as the trafficking of adolescent girls across international borders. The causes of adolescent prostitution in Nigeria are largely economic, sociological, and socioeconomic factors. A two-dimensional approach was adopted in considering the attitude to prostitution. Coping mechanisms include endurance, self-medication, seeking medical attention, and adaptation. The effects of prostitution are psychological reactions, psychosocial damage, and the political implication, which damages the image of the nation. Approaches to combat adolescent prostitution in Nigeria include legislative steps, governmental efforts, policy making, awareness programs, and the efforts of nongovernmental organizations, community conscientization, and societal measures.  相似文献   
896.
Although many empirical studies have documented the range and severity of problems caused by psychopaths, considerably less attention has focused on understanding its origins. Efforts to treat this potentially dangerous population have been equally frustrating, as psychotherapeutic approaches have almost always proven ineffectual. Because of the limited understanding of the psychological and interpersonal dynamics underlying psychopathy, the authors sought to assess the extent to which object relations theory could inform our understanding of psychopathy. In addition to eliciting background information, 74 men sentenced to probation following a criminal conviction were assessed using the Psychopathy Checklist: Screening Version, a clinician-rated measure of psychopathy, and were administered the BORI, a self-report measure of object relations. Results showed significant correlations between object relations dimensions, psychopathy scores, and childhood environment data. Furthermore, object relations scores added to the prediction of psychopathy even after demographic and behavioral variables were considered, suggesting that object relations deficits comprise a significant component of psychopathy. Results suggest that psychopaths harbor profound underlying psychosocial damage including intense anxiety, anger, bitterness, and resentment. Implications for interventions and future research are discussed.  相似文献   
897.
We describe a method to obtain reliable mitochondrial DNA (mtDNA) sequences downstream of the homopolymeric stretches with length heteroplasmy in the sequencing direction. The method is based on the use of junction primers that bind to a part of the homopolymeric stretch and the first 2-4 bases downstream of the homopolymeric region. This junction primer method gave clear and unambiguous results using samples from 21 individuals with length heteroplasmy in the hypervariable regions HV1, HV2 or both. The method is of special value for forensic casework, because sequencing of both strands of an mtDNA region is preferable in order to reduce ambiguities in sequence determination.  相似文献   
898.
899.
Kantrowitz B  Wingert P 《Newsweek》2002,139(17):60-4, 66
  相似文献   
900.
Beyond the light     
Stone B 《Newsweek》2002,140(15):75
  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