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   8249篇
  免费   206篇
各国政治   469篇
工人农民   412篇
世界政治   528篇
外交国际关系   321篇
法律   4897篇
中国政治   58篇
政治理论   1703篇
综合类   67篇
  2020年   84篇
  2019年   106篇
  2018年   142篇
  2017年   162篇
  2016年   179篇
  2015年   131篇
  2014年   168篇
  2013年   936篇
  2012年   184篇
  2011年   188篇
  2010年   178篇
  2009年   160篇
  2008年   220篇
  2007年   233篇
  2006年   241篇
  2005年   199篇
  2004年   181篇
  2003年   203篇
  2002年   166篇
  2001年   293篇
  2000年   252篇
  1999年   240篇
  1998年   111篇
  1997年   92篇
  1996年   79篇
  1995年   79篇
  1994年   88篇
  1993年   78篇
  1992年   134篇
  1991年   177篇
  1990年   170篇
  1989年   152篇
  1988年   173篇
  1987年   182篇
  1986年   174篇
  1985年   164篇
  1984年   144篇
  1983年   128篇
  1982年   94篇
  1981年   102篇
  1980年   78篇
  1979年   137篇
  1978年   96篇
  1977年   77篇
  1976年   62篇
  1975年   89篇
  1974年   91篇
  1973年   85篇
  1972年   61篇
  1971年   57篇
排序方式: 共有8455条查询结果,搜索用时 15 毫秒
901.
902.
903.
Occasionally, partial calvariae of hydrocephalic calves are found in forensic contexts and mistakenly identified as human. Such specimens can be properly identified through immunological assessment of associated soft tissue, microscopic analysis of associated hair, and morphological comparison with documented museum specimens. Morphological comparison should focus on the form of the occiput, supraorbital grooves, and bulbous vault and presence of coronal processes.  相似文献   
904.
The venture capital industry represents the high growth end of the enterprise development spectrum. To promote this high value activity, states have ventured into new development finance realms. This article reviews various state approaches and concentrates on a diversified strategy adopted by the Commonwealth of Pennsylvania.  相似文献   
905.
A 19-year-old woman ran against a glass door, and, breaking it, was struck in the left anterior chest by a single dagger-like fragment of broken door glass. This fragment deeply penetrated her chest and wounded the anterior wall of the left ventricle of her heart. She rapidly died from loss of blood. The majority of single fatal penetrating chest wounds seen at postmortem examinations are caused by firearms and bladed weapons. While penetrating chest wounds occasionally result from fragments of glass, most severe and fatal wounds from glass result from one's falling into or through plate glass and sustaining wounds of the head, face, abdomen, or extremities. A single fatal wound from a dagger-shaped piece of glass is distinctly uncommon. To prevent such an accident from occurring, safety glass must be used in front doors of public institutions.  相似文献   
906.
The authors expand their methodology for quantifying and comparing civil commitment processes by developing new formulas for the determination of the average commitment detention time and cost. They also examine the effects of specific changes in commitment procedures on the average detention time and cost. Using data from Oregon's civil commitment process, the authors present several examples of the practical application of their methodology and conclude with a discussion of its major administrative and research implications.  相似文献   
907.
Serum samples were available from 492 of 1,058 cadavers seen at the Philadelphia Medical Examiner's Office between August 4 and December 15, 1989. These sera were tested for the presence of antibodies to human immunodeficiency virus (HIV) by enzyme-linked immunosorbent assay (ELISA) and Western blot. The overall prevalence of HIV in the autopsy population was 2.24%. The following populations showed increased prevalence as compared to the total sampled population: blacks (3.60%, p less than 0.01), males (2.51%, n.s.), and homicide victims (3.74%, n.s.). Seroprevalence data from this study are compared with those from earlier studies of other related populations, with regard to overall prevalence and risk factor analysis.  相似文献   
908.
I examine the development of privately provided insurance since World War II, giving special attention to Empire Blue Cross, and argue that the competition between employers and unions for the loyalty of workers after the passage of the Taft-Hartley Act helped diffuse private health insurance benefits already favored by federal policies. For-profit insurers did not challenge the privileged status of Blue Cross plans because they recognized the political benefits that the plans offered and because they did not wish to offend the plans' sponsors. A relatively easy and profitable business, health insurance has been greatly disturbed by the system inflation accompanying the introduction of Medicare and Medicaid programs. Now self-insurance and various managed-care schemes are major threats. The future may bring consolidation and the strengthening of pools, just the opposite of today's system fragmentation.  相似文献   
909.
This paper analyzes the role of coordination criteria in employment and training service delivery within the Job Training Partnership Act system. The evolution of coordination criteria is related to current initiatives in the Employment Service at the state and local levels. An operational set of program outcome measures for monitoring coordination efforts is discussed. This set of outcome measures is formulated in the broad context of stabilizing employment and averting the "structuralization" of unemployment impacts wrought by fundamental economic change in the labor market. The assessment and monitoring of such coordination efforts is discussed.  相似文献   
910.
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