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   11588篇
  免费   327篇
各国政治   384篇
工人农民   456篇
世界政治   779篇
外交国际关系   390篇
法律   7751篇
中国政治   70篇
政治理论   2025篇
综合类   60篇
  2020年   149篇
  2019年   188篇
  2018年   232篇
  2017年   255篇
  2016年   272篇
  2015年   177篇
  2014年   245篇
  2013年   1037篇
  2012年   279篇
  2011年   306篇
  2010年   246篇
  2009年   266篇
  2008年   295篇
  2007年   326篇
  2006年   334篇
  2005年   252篇
  2004年   273篇
  2003年   304篇
  2002年   246篇
  2001年   497篇
  2000年   470篇
  1999年   360篇
  1998年   145篇
  1997年   126篇
  1996年   122篇
  1995年   116篇
  1994年   132篇
  1993年   111篇
  1992年   253篇
  1991年   250篇
  1990年   255篇
  1989年   264篇
  1988年   262篇
  1987年   270篇
  1986年   231篇
  1985年   254篇
  1984年   197篇
  1983年   207篇
  1982年   140篇
  1981年   139篇
  1980年   106篇
  1979年   146篇
  1978年   107篇
  1977年   88篇
  1976年   86篇
  1975年   73篇
  1974年   92篇
  1973年   86篇
  1971年   72篇
  1970年   70篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
A minisatellite probe, MZ 1.3, detecting hypervariable fragment patterns was isolated from a human genomic library. A repetitive sequence of 27 bp length was identified which is contained in the probe approx. 40 times. The MZ 1.3 repeat shows variable homology of 53-73% to the repetitive sequence of the protein III gene of the bacteriophage M13 genome. Polymorphic restriction fragment patterns were found with MZ 1.3 using the enzymes Hinf I, BstN I, Hae III, Mbo I, PstI/Pvu II, and Rsa I. An average of 18 polymorphic fragments was observed using Hinf I as enzyme. The band sharing frequency after Hinf I digestion among unrelated individuals was determined to be 23.8 +/- 7.2%. An example for the application of MZ 1.3 to paternity testing in an incest case is given. The probe can be used with radioactive or non-radioactive detection systems. An approach is presented to compare polymorphic fragment patterns from individuals obtained by independent gel runs on the basis of relative band positions (RBP) and calculated in a computerized analysis.  相似文献   
42.
43.
44.
The enzyme activity of phosphoglucomutase (PGM) has been investigated in red cell haemolysates from 142 individuals and compared to the sub-type as determined by isoelectric focusing. The 10 phenotypes showed significant differences in PGM-activity which indicates that there is a correlation between the level of activity and the isolelectric point of homozygotes. No indication of silent alleles or alleles with reduced activity was found in this collective.  相似文献   
45.
46.
The Green River Murder Investigation in King County, Washington, is currently the longest active serial murder investigation in U.S. history. During its course, over 26 separate scenes with from one to five victims each have been processed. The experience of the authors is presented in order to acquaint other agencies with techniques of outdoor scene processing that have evolved during recovery of remains from Green River and other skeletal cases.  相似文献   
47.
48.
The population-adjusted rate of teenage suicide in King County, Washington, was reviewed for the 26 years from 1959 to 1984. For the entire period, the rate did not change significantly. An abrupt change did occur during the middle of this period, but, for reasons discussed in the text, this may well represent a change in procedures and philosophy of death certification rather than a real change in rate. Reasons for the apparent discrepancy with national statistics are discussed.  相似文献   
49.
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   
50.
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