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   863篇
  免费   24篇
各国政治   49篇
工人农民   47篇
世界政治   83篇
外交国际关系   26篇
法律   375篇
中国政治   16篇
政治理论   284篇
综合类   7篇
  2021年   5篇
  2020年   6篇
  2019年   16篇
  2018年   15篇
  2017年   17篇
  2016年   18篇
  2015年   11篇
  2014年   21篇
  2013年   142篇
  2012年   19篇
  2011年   27篇
  2010年   19篇
  2009年   10篇
  2008年   28篇
  2007年   20篇
  2006年   30篇
  2005年   25篇
  2004年   26篇
  2003年   23篇
  2002年   24篇
  2001年   22篇
  2000年   18篇
  1999年   13篇
  1998年   11篇
  1997年   25篇
  1996年   14篇
  1995年   15篇
  1994年   15篇
  1993年   14篇
  1991年   11篇
  1990年   10篇
  1989年   16篇
  1988年   10篇
  1987年   11篇
  1986年   18篇
  1985年   12篇
  1984年   19篇
  1983年   10篇
  1982年   11篇
  1981年   10篇
  1979年   12篇
  1978年   6篇
  1977年   7篇
  1976年   10篇
  1975年   5篇
  1974年   5篇
  1972年   5篇
  1971年   8篇
  1968年   6篇
  1967年   7篇
排序方式: 共有887条查询结果,搜索用时 78 毫秒
61.
Medical examiners frequently rely on the finding of free morphine present in postmortem specimens to assist in certifying deaths associated with narcotics. In vitro hydrolysis of morphine-3-D glucuronide (M3DG) to free morphine was studied using variable specimen pH, initial degree of specimen putrefaction, storage temperature and time, and the effectiveness of sodium fluoride (NaF) preservation. Reagent M3DG was added to opiate-free fresh blood and urine and to autopsy-derived blood specimens. Reagent bovine glucuronidase was also added to certain specimens. Freshly collected and refrigerated NaF-preserved blood produced minimal free morphine, whereas four of five autopsy blood specimens produced free morphine from M3DG. Increased storage time, temperature, and initial degree of putrefaction resulted in greater free morphine generation despite the absence of viable bacteria. Hydrolysis occurring during specimen storage can generate free morphine from M3DG and may result in erroneous conclusions in certifying narcotic deaths.  相似文献   
62.
This study utilized a naturalistic methodology to develop a grounded theory of the process of recovery and rebuilding among abused women situated in the conservative evangelical subculture. Among all the women, spirituality and church participation were an integral part of their identity and generated culture-specific issues that needed to be addressed in therapy. The women's faith functioned as a meaning-making framework that could either engender shame and guilt or inspire hope and empower transformative change. The church functioned as an extended family system that could minimize, deny, and enable abuse or provide much-needed social support, spiritual encouragement, and practical assistance. The recovery process required that these women rebuild their personal and spiritual identity, redefine their relationship with the religious community, and find ways of expressing their new identity within the religious subculture.  相似文献   
63.
Pregnancy among adolescents, and especially among low-income adolescents, represents a high-risk situation from multiple points of view. When compared to data for the population at large, obstetrical outcome is worsened, subsequent educational attainment is poor, social prognosis is guarded, and repeat unwanted pregnancies are common. The surviving infants, similarly have relatively high incidences of medical and developmental problems. In recent years, comprehensive interdisciplinary programs have been organized to offer more meaningful help to these individuals. The present report describes the authors' 5-year experience with one early intensive program. Considerable medical, educational, and social successes have been noted. The results are especially striking when contrasted with the authors' current experience with an improving but still more fragmented and less successful program. Findings concerning infant development and the mother-infant interaction are also noted. Finally, issues related to the achievement of successes and the persistence of problems after provision of more adequate comprehensive services are discussed.This study was supported in part by Grant No. 03-H-000-079-03-0, Maternal and Child Health Service, H.S.M.H.A., H.E.W.While on the faculty of the State University of New York, College of Medicine at Syracuse, was a founder and the first medical director of the YMED program.Specialty is Developmental Psychology, and research interests concern infant and early child development and the effects of children on parents. While on the faculty of Cornell University, served as a consultant to the YMED program.Project director of the high-risk program.While on the faculty of the State University of New York, College of Medicine at Syracuse, was obstetrical director of the YMED program.  相似文献   
64.
The public choice literature contains little formal analysis of the bureaucratic choice of production modes — public or private — of publicly funded services. An important question to be addressed is why some governmental bodies choose to provide a publicly funded service with publicly owned and operated production units whereas other governmental bodies contract with private firms to provide the same publicly funded service. This paper is the first formal attempt to remedy this gap in the literature. We develop a theoretical explanation of the government decision maker's choice between public and private production modes based on utility maximizing behavior. We then examine empirically this choice employing logit analysis. The empirical results, which include several tests for robustness, confirm our theoretical explanation. The results are significant and suggest that non-monetary constraints are an important factor affecting this choice of production modes and that monetary constraints are less influential.  相似文献   
65.
66.
Thirty Black women activists within different age categories, from varied educational and occupational backgrounds, and representing Black women's organizations from different regions of the U.S. were interviewed to determine their views on the meaning and effect of the UN Decade for Women on the lives of Black American women. Their responses to questions about the Decade indicate that the masses of Black women are poorly informed or totally uninformed about the UN Decade for Women. And, among that segment of the Black female population which is well informed about the Decade, positive views on the benefits of the Decade for Black women correlate strongly with employment in a national women's organization or governmental agency dealing with women's issues, and personal involvement in UN Conferences. Many Black women feel that the opportunity to network with third-world women is the major benefit that Black American women gained from the Decade. They also feel that American racism and class bias effectively prevent equitable implementation of a national plan of action to improve the status of women in the United States.  相似文献   
67.
68.
69.
70.
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