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   17466篇
  免费   1376篇
各国政治   822篇
工人农民   541篇
世界政治   1434篇
外交国际关系   718篇
法律   11325篇
中国共产党   1篇
中国政治   129篇
政治理论   3730篇
综合类   142篇
  2023年   72篇
  2021年   97篇
  2020年   430篇
  2019年   475篇
  2018年   540篇
  2017年   627篇
  2016年   648篇
  2015年   531篇
  2014年   567篇
  2013年   2146篇
  2012年   428篇
  2011年   521篇
  2010年   679篇
  2009年   643篇
  2008年   423篇
  2007年   456篇
  2006年   536篇
  2005年   457篇
  2004年   445篇
  2003年   427篇
  2002年   423篇
  2001年   557篇
  2000年   456篇
  1999年   391篇
  1998年   229篇
  1997年   218篇
  1996年   186篇
  1995年   214篇
  1994年   233篇
  1993年   189篇
  1992年   298篇
  1991年   323篇
  1990年   278篇
  1989年   291篇
  1988年   272篇
  1987年   238篇
  1986年   271篇
  1985年   287篇
  1984年   271篇
  1983年   246篇
  1982年   193篇
  1981年   179篇
  1980年   163篇
  1979年   184篇
  1978年   122篇
  1977年   109篇
  1976年   97篇
  1975年   85篇
  1974年   91篇
  1973年   78篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
121.
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   
122.
David Popenoe 《Society》1993,30(6):5-11
He is co-author of Fatherless America,which is forthcoming. He serves as co-chair of the Council on Families in America, a nonpartisan, interdisciplinary group of scholars and family experts concerned with family and child well-being.  相似文献   
123.
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   
124.
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   
125.
126.
127.
128.
Little literature has been developed to describe the process of transferring a corporation's technology between international units of that company for ultimate transfer to their external customers (Kimberly 1981 and Leonard-Barton and Sinha 1993). This paper addresses the issues at Air Products and Chemicals, Inc. involved in the transfer of applications technology. Technology is transferred from the unit of the corporation which develops the technology to international affiliates and subsidiaries. The ultimate goal is the support of product sales to the external industrial customer. A strategy for this type of organization is described which is supported by references to theoretical constructs in the literature and empirical observations from the organization itself.  相似文献   
129.
130.
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