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   14003篇
  免费   391篇
各国政治   654篇
工人农民   509篇
世界政治   1020篇
外交国际关系   487篇
法律   8153篇
中国共产党   1篇
中国政治   82篇
政治理论   3358篇
综合类   130篇
  2020年   152篇
  2019年   204篇
  2018年   257篇
  2017年   294篇
  2016年   316篇
  2015年   221篇
  2014年   259篇
  2013年   1516篇
  2012年   289篇
  2011年   358篇
  2010年   303篇
  2009年   352篇
  2008年   377篇
  2007年   379篇
  2006年   357篇
  2005年   336篇
  2004年   335篇
  2003年   349篇
  2002年   386篇
  2001年   507篇
  2000年   445篇
  1999年   379篇
  1998年   220篇
  1997年   199篇
  1996年   194篇
  1995年   179篇
  1994年   172篇
  1993年   178篇
  1992年   284篇
  1991年   305篇
  1990年   279篇
  1989年   301篇
  1988年   268篇
  1987年   267篇
  1986年   314篇
  1985年   301篇
  1984年   258篇
  1983年   268篇
  1982年   188篇
  1981年   160篇
  1980年   136篇
  1979年   174篇
  1978年   109篇
  1977年   132篇
  1976年   120篇
  1975年   88篇
  1974年   115篇
  1973年   95篇
  1972年   90篇
  1971年   81篇
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
41.
The remains of an unidentified female neonate were discovered in a field in central Missouri. Examination revealed bilateral absence of the parietal bones. A search of the literature describing similar defects suggests that the present case represents a unique condition, described here for the first time.  相似文献   
42.
43.
44.
45.
46.
What Do Prosecutors Maximize? Evidence from the Careers of U.S. Attorneys   总被引:1,自引:0,他引:1  
This study examines the performance of chief federal prosecutors(U.S. attorneys) and their subsequent careers. In a sample of570 attorneys in office from 1969 to 2000, the length of prisonsentences is positively related to subsequent favorable careeroutcomes for U.S. attorneys. In contrast, conviction rates donot appear to affect the careers of U.S. attorneys. These resultsare consistent with longer total prison sentences’ beingpersonally beneficial to prosecutors, and prosecutors’maximizing the length of prison sentences. Overall, the resultssuggest that sentence length, as opposed to convictions rates,is the relevant performance metric.  相似文献   
47.
48.
49.
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   
50.
The Supreme Court early took note of extralegal, “social science” materials in Muller v. Oregon (1908), and a half-century later made specific reference to social science authorities in the famous footnote 11 of Brown v. Board of Education (1954). Since Brown, much has been written about the Supreme Court's use of social science research evidence, but there has been little systematic study of that use. Those writing on the subject commonly focus on areas of law such as jury size, where social science has been used, and have generally assumed that social science information has been utilized in Supreme Court decisions with increasing regularity. Surprisingly little is known, however, about either the justices' baseline use of social science authorities, or many other aspects of their uses of social science information. The focus here is on the citation of social science research evidence in a sample of 240 criminal cases decided during the 30 years between the Supreme Court's 1958 and 1987 Terms. The resulting portrait contributes to a fuller understanding of the justices' use of social science materials, and may ultimately help promote more effective utilization of social science research evidence in Supreme Court decisions.  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