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   12470篇
  免费   1259篇
各国政治   464篇
工人农民   398篇
世界政治   914篇
外交国际关系   353篇
法律   9328篇
中国共产党   1篇
中国政治   96篇
政治理论   2091篇
综合类   84篇
  2020年   349篇
  2019年   356篇
  2018年   418篇
  2017年   471篇
  2016年   476篇
  2015年   446篇
  2014年   445篇
  2013年   1280篇
  2012年   296篇
  2011年   377篇
  2010年   551篇
  2009年   510篇
  2008年   299篇
  2007年   282篇
  2006年   376篇
  2005年   257篇
  2004年   249篇
  2003年   242篇
  2002年   226篇
  2001年   454篇
  2000年   370篇
  1999年   317篇
  1998年   156篇
  1997年   151篇
  1996年   116篇
  1995年   146篇
  1994年   150篇
  1993年   127篇
  1992年   229篇
  1991年   242篇
  1990年   229篇
  1989年   238篇
  1988年   219篇
  1987年   197篇
  1986年   217篇
  1985年   236篇
  1984年   229篇
  1983年   191篇
  1982年   156篇
  1981年   138篇
  1980年   137篇
  1979年   158篇
  1978年   99篇
  1977年   85篇
  1976年   72篇
  1975年   80篇
  1974年   83篇
  1973年   69篇
  1972年   55篇
  1971年   59篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
Jail and prison populations in the United States have continued to grow unabated during the past two decades but crime rates have not declined. Partly in response to the pressures caused by burgeoning correctional populations, the use of alternatives to incarceration has expanded. An ongoing debate centers on the effectiveness of these alternatives. Many criminal justice professionals and some researchers question whether such alternatives seriously restrict the criminal justice system 's ability to incapacitate the active offender. This study deals specifically with two alternatives to incarceration: probation and parole. We examine offender recidivism for a sample of probationers and parolees active in New Orleans, Louisiana, and offer a new approach to addressing the effectiveness issue. Past research has evaluated the effectiveness of alternatives by examining failure rates of diverted offenders. High failure rates, we argue, do not necessarily imply a significant loss of the incapacitative effects of imprisonment. We suggest that a more appropriate measure of the loss of incapacitative effect is the proportion of all offenses committed by persons on probation or parole. Our results suggest that such losses are surprisingly low. The policy implications of our findings are discussed.  相似文献   
94.
A review of the available literature does not reveal a plausible explanation as to why the incisal edges of maxillary anterior teeth do not always mark clearly. Generally, the mandibular incisal edges do mark with some consistency. This paper demonstrates through test bites on skin that the answer lies in the position of the mandible.  相似文献   
95.
The authors are respectively parttime professor sociology at the University of Texas (San Antonio) as well as lecturer at the medical faculty of the State University Limburg (section psychiatry) and researcher at the Research and Documentation Centre of the Ministry of Justice, Schedeldoekshaven 100, 2511 EX The Hague, The Netherlands. Dorette Courtar, a mobility programme exchange student at the University of Maastricht and the Stockholm University, assisted in the basic research. We would like to thank Paulina Loennroth and the mayor of Hulst, dr. A.A.L.G.M. Kessen, both connected to the ECAD and Paul Vasseur, Urban Weber, Suzanne Schardt, all connected to the ECDP for their information and comments.  相似文献   
96.
The fingernail ridge patterns of a pair of identical twins were compared to each other, their parents, and an unrelated subject. The patterns of the twins' nails showed regions of strong similarity but were distinguishable from one another. Fewer similarities were found when comparing the nails to those of the parents and the unrelated control. The twins were shown to be monozygotic by means of DNA profiling. This therefore represents the first demonstration of unique fingernail ridge patterns in subjects shown conclusively to be identical twins. When the fingernail ridge patterns were examined with a scanning electron microscope, the backscattered electron (BEI) images were found to have superior contrast when compared to the secondary electron (SEI) images.  相似文献   
97.
98.
99.
100.
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