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   14591篇
  免费   652篇
各国政治   616篇
工人农民   521篇
世界政治   1111篇
外交国际关系   420篇
法律   9523篇
中国共产党   2篇
中国政治   79篇
政治理论   2900篇
综合类   71篇
  2020年   229篇
  2019年   283篇
  2018年   300篇
  2017年   378篇
  2016年   385篇
  2015年   319篇
  2014年   337篇
  2013年   1417篇
  2012年   343篇
  2011年   396篇
  2010年   368篇
  2009年   373篇
  2008年   396篇
  2007年   372篇
  2006年   383篇
  2005年   356篇
  2004年   356篇
  2003年   339篇
  2002年   335篇
  2001年   620篇
  2000年   561篇
  1999年   399篇
  1998年   241篇
  1997年   196篇
  1996年   160篇
  1995年   165篇
  1994年   186篇
  1993年   175篇
  1992年   276篇
  1991年   289篇
  1990年   293篇
  1989年   291篇
  1988年   279篇
  1987年   266篇
  1986年   328篇
  1985年   300篇
  1984年   227篇
  1983年   241篇
  1982年   157篇
  1981年   164篇
  1980年   123篇
  1979年   168篇
  1978年   128篇
  1977年   105篇
  1976年   100篇
  1975年   80篇
  1974年   129篇
  1973年   115篇
  1972年   106篇
  1969年   82篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
Correlation between plasma and bone marrow tricyclic antidepressants has not been studied before. Two groups of rabbits were given 10 and 20 mg of desipramine/kg body weight, respectively. Desipramine was administered to the animals once daily by mouth for 5 days. On the fifth day the animals were sacrificed and blood and bone marrow samples were collected and analyzed using a high performance liquid chromatographic (HPLC) method. Data showed that a correlation exists between bone marrow and blood desipramine. The bone marrow desipramine concentration increased as its blood levels increased. The average ratio of bone marrow to blood desipramine +/- S.D. (standard deviation) in both dosage groups was 37.2 +/- 4.46 with a range of 30.99-44.82. This investigation is promising and shows that bone marrow could be used as an alternative tissue in the absence of a suitable blood sample.  相似文献   
43.
This article examines voluntary mediation and provides suggested criteria for attorneys in deciding whether or not to use mediation. The author discusses what mediation has to offer, what it takes to make it work, and important cautions for attorneys in deciding about the use of this process.  相似文献   
44.
45.
In motorcycle accidents involving two riders, medicolegal identification of the driver is necessary when one or both riders die. It is particularly important in the latter case, because the survivor almost always insists that he or she was not driving. One characteristic injury that distinguishes the driver from the passenger is inguinal contusion-laceration (accompanied internally by pelvic fracture). This injury, caused by collision of the pelvis with the fuel tank, identifies the driver.  相似文献   
46.
47.
Kindergarten policy varies widely both across and within states. Over the past decade, a number of states have instituted a full‐day kindergarten requirement and others are considering it as a way to increase educational achievement. Many parents also support full‐day kindergarten as a source of child care. This paper uses the Early Child Longitudinal Study–Kindergarten Class of 1998–1999 to evaluate the efficacy of this policy. In ordinary least squares, probit, county fixed effects, and instrumental variables models, we find that there are initial benefits for students and the mothers of students who attend full‐day kindergarten, but that these differences largely evaporate by third grade. Contrary to claims by some advocates, attending full‐day kindergarten is found to have no additional benefit for students in families with income below the poverty threshold. © 2006 by the Association for Public Policy Analysis and Management  相似文献   
48.
49.
50.
This study probes the interconnections among distrust of government, the historical context, and public support for the death penalty in the United States with survey data for area-identified samples of white and black respondents. Multilevel statistical analyses indicate contrary effects of government distrust on support for the death penalty for blacks and whites, fostering death penalty support among whites and diminishing it among blacks. In addition, we find that the presence of a "vigilante tradition," as indicated by a history of lynching, promotes death penalty support among whites but not blacks. Finally, contrary to Zimring's argument in The Contradictions of Capital Punishment , we find no evidence that vigilantism moderates the influence of government distrust on support for the death penalty, for either whites or blacks. Our analyses highlight the continuing influence of historical context as well as contemporary conditions in the formation of public attitudes toward criminal punishment, and they underscore the importance of attending to racial differences in the analysis of punitive attitudes.  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