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   5677篇
  免费   139篇
各国政治   171篇
工人农民   280篇
世界政治   266篇
外交国际关系   179篇
法律   4050篇
中国政治   47篇
政治理论   805篇
综合类   18篇
  2021年   35篇
  2020年   56篇
  2019年   62篇
  2018年   171篇
  2017年   115篇
  2016年   177篇
  2015年   91篇
  2014年   94篇
  2013年   337篇
  2012年   225篇
  2011年   207篇
  2010年   98篇
  2009年   119篇
  2008年   126篇
  2007年   98篇
  2006年   135篇
  2005年   484篇
  2004年   222篇
  2003年   127篇
  2002年   105篇
  2001年   241篇
  2000年   155篇
  1999年   156篇
  1998年   54篇
  1997年   51篇
  1996年   39篇
  1995年   54篇
  1994年   48篇
  1993年   62篇
  1992年   111篇
  1991年   111篇
  1990年   117篇
  1989年   106篇
  1988年   116篇
  1987年   105篇
  1986年   131篇
  1985年   132篇
  1984年   101篇
  1983年   94篇
  1982年   46篇
  1981年   41篇
  1979年   47篇
  1978年   49篇
  1975年   44篇
  1974年   69篇
  1973年   38篇
  1972年   44篇
  1971年   47篇
  1970年   43篇
  1968年   45篇
排序方式: 共有5816条查询结果,搜索用时 15 毫秒
11.
Data on 63 cases of subcapsular spleen lesions are analyzed. Circumstances of trauma infliction period of the 2-nd stage of spleen capsule rupture, morphological types of subcapsular spleen lesions, microscopic changes in different posttraumatic periods are presented.  相似文献   
12.
13.
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations.  相似文献   
14.
Local government reforms in contemporary Russia are placed in the broader contexts of political reform under Putin and the historical relationship between local administration and the state. Reforms of local government thus help illuminate the architecture of contemporary state building in Russia and the degree to which contemporary Russia perpetuates political traditions. This study reviews the antecedent action in local government prior to the Putin era. It then examines the Kozak Commission and the new law on local government, assessing the strengths and weaknesses of these reforms. Finally, this study examines the challenges of implementing the reforms and what these challenges tell us about devolution and centralisation under Putin.  相似文献   
15.
This study examines changes in the rate of offending in a sample of 8,834 males whose official juvenile law-violating careers included 26,650 offense episodes between ages 8 and 17 The rate of offending of active offenders (i.e., lambda) varied substantially as a function of age, increasing monotonically with age. Lambda, however, was not related to the age at first offense. In fact, the average lambda was amazingly constant at each individual age level regardless of the age at which offending began or desisted. Results are discussed in the light of age-crime curves known from other data sets and from the perspective of developmental changes in the rate of offending as youths grow older.  相似文献   
16.
17.
18.
19.
In the statistical interpretation of forensic glass evidence it is standard practice to make the assumption of homogeneity of the refractive index (RI) of the source glass, or of localized homogeneity. However, the work of Locke and Hayes showed that, for toughened windscreen glass, this assumption might not be true. This work is well cited, but there appears to have been little follow-on published research. Furthermore, the toughening process is something known to affect the refractive index, and is a process that float glass does not undergo. Float glass is a major component of casework in New Zealand and for that reason it would be interesting to know whether the findings of Locke and Hayes apply when dealing with float glass. In this paper we describe an experiment similar to that of Locke and Hayes, systematically examining the variation of RI in a pane of float window glass. It was found that, although there were no systematic differences in refractive index, there were observable differences across the pane.  相似文献   
20.
Report of an unusual finding of bones on the shore of the Baltic Sea. Although the morphological findings appeared similar to a human foot skeleton, a quick identification as sea dog bone was possible.  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