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   445篇
  免费   24篇
各国政治   14篇
工人农民   61篇
世界政治   53篇
外交国际关系   13篇
法律   265篇
中国政治   10篇
政治理论   51篇
综合类   2篇
  2024年   1篇
  2023年   4篇
  2022年   5篇
  2021年   3篇
  2020年   15篇
  2019年   14篇
  2018年   24篇
  2017年   16篇
  2016年   20篇
  2015年   12篇
  2014年   24篇
  2013年   66篇
  2012年   21篇
  2011年   12篇
  2010年   14篇
  2009年   28篇
  2008年   24篇
  2007年   28篇
  2006年   20篇
  2005年   25篇
  2004年   14篇
  2003年   13篇
  2002年   15篇
  2001年   5篇
  2000年   3篇
  1999年   7篇
  1998年   4篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1994年   4篇
  1993年   2篇
  1992年   6篇
  1991年   5篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1980年   2篇
排序方式: 共有469条查询结果,搜索用时 15 毫秒
111.
Umbilical cord blood is a source of haematopoietic progenitor cells, which are used to treat a range of malignant, genetic, metabolic and immune disorders. Until recently, cord blood was either collected through donations to publicly funded cord blood banks for use in allogeneic transplantation, or stored in commercial cord blood banks for use in autologous transplantation. The line between public and private cord blood banking is being blurred by the emergence of "hybrid" models that combine aspects of both the public and private systems. The authors describe these hybrid models and argue that their emergence is explained by both market forces and public sector policy They propose that the future of the sector will depend heavily on several key developments that will differentially affect public, private and hybrid banking models.  相似文献   
112.
The use of brain imaging technology as a common tool of research has spawned concern and debate over how investigators should respond to incidental findings discovered in the course of research. In this article, we argue that investigators have an obligation to respond to incidental findings in view of their entering into a professional relationship with research participants in which they are granted privileged access to private information with potential relevance to participants' health. We discuss the scope and limits of this professional obligation to respond to incidental findings, bearing in mind that the relationship between investigators and research participants differs fundamentally from the doctor-patient relationship.  相似文献   
113.
114.
115.
Psychosocial stress is consistently found to promote initiation, intensification, and relapse in drug abuse. It would, therefore, be desirable to identify characteristics of offenders who are at heightened risk for stress-induced exacerbations of addictive behavior. In this cross-sectional, correlational, interview study, 500 clients of two Kentucky drug courts averaged 30 years of age and were predominantly male, White, employed, high school educated, single, and adjudicated in small- and medium-size cities. Five independent correlates of greater subjective stress emerged in stepwise multiple regression analysis (R2 = .395): use of escape-avoidance coping, positive reappraisal coping (inversely associated), more negative life events, better self-rated health (inversely associated), and access to social support related to work problems (inversely associated). Treatment interventions emphasizing effective coping styles and building of social support as well as managing of negative life events and perceptions of health may serve to lessen subjective stress and its consequences in drug-abusing criminal populations.  相似文献   
116.
117.
Andrews M 《U.S. news & world report》2006,141(17):68, 70, 72 passim
  相似文献   
118.
This research examines the connection between physical abuse and social isolation. Using data from the National Youth Survey, a measure of self-perceived social isolation was constructed indicating the extent to which respondents feel detached from their friends and from school. Those who had experienced violence were predicted to be more isolated than those who had not. Results strongly supported the hypothesis, controlling for theoretically relevant variables. Explanation is provided in terms of damage to attachment skills, social competence, and self-esteem concomitant to being a victim of abuse. Males were more socially isolated than females, and Hispanics more than Whites. Children with involved parents were less socially isolated; those whose parents experienced normlessness were more isolated. Children who recently experienced a stressful event or were from riskier neighborhoods were more isolated. The number of children in the family was positively related to isolation. Social isolation decreases between seventh and eighth grades.  相似文献   
119.
Sensationalist media coverage greeted the release of a man convicted more than a decade ago for spreading HIV in Conception Bay North. Concerns have been expressed that the extensive coverage of the release will further stigmatize all people living with HIV/AIDS.  相似文献   
120.
This paper examines the relationship between various quantitative measures of urban centralization and urban housing prices through the use of a 2000 data set from the 452 Census designated urbanized areas in the United States. An empirical study of this type is necessary because: (1) the theoretical influence of creating more centralized urban areas—or what many would consider less “sprawl”—on what people pay for housing is indeterminate, (2) now popular “Smart Growth” policies advocate more centralized urban areas, and (3) some have argued that a cost of this centralization is an increase in the price of homes. After controlling for differences across United States urbanized areas in residents' economic status and demographics, number and type of households, climate, household growth, nonresidential land uses, and the structural characteristics of houses, we find that a more centralized area exhibits a lower median home value and percentage of homes in an upper‐end price category. Therefore, we offer no evidence to support the contention that a successful effort to further centralize an urban area raises the price of homes in that urban area. © 2006 by the Association for Public Policy Analysis and Management  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