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   15952篇
  免费   466篇
各国政治   850篇
工人农民   514篇
世界政治   1307篇
外交国际关系   626篇
法律   8907篇
中国政治   98篇
政治理论   3957篇
综合类   159篇
  2020年   172篇
  2019年   245篇
  2018年   314篇
  2017年   358篇
  2016年   367篇
  2015年   262篇
  2014年   325篇
  2013年   1848篇
  2012年   353篇
  2011年   420篇
  2010年   346篇
  2009年   391篇
  2008年   441篇
  2007年   501篇
  2006年   442篇
  2005年   400篇
  2004年   413篇
  2003年   418篇
  2002年   410篇
  2001年   522篇
  2000年   475篇
  1999年   382篇
  1998年   276篇
  1997年   211篇
  1996年   232篇
  1995年   206篇
  1994年   202篇
  1993年   213篇
  1992年   298篇
  1991年   333篇
  1990年   311篇
  1989年   308篇
  1988年   290篇
  1987年   296篇
  1986年   335篇
  1985年   304篇
  1984年   291篇
  1983年   276篇
  1982年   214篇
  1981年   173篇
  1980年   155篇
  1979年   189篇
  1978年   123篇
  1977年   152篇
  1976年   115篇
  1975年   94篇
  1974年   113篇
  1973年   114篇
  1972年   99篇
  1971年   75篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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   
52.
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   
53.
54.
The extent to which local life circumstances influence criminal activity has been the focus of much theoretical debate. Although empirical research has been initiated, it remains limited. Herein, we use data on 524 serious offenders from the California Youth Authority for a seven‐year post‐parole period to examine the relationship between changes in local life circumstances and criminal activity. We extend previous research by employing a statistical model that accounts for the joint distribution of violent and nonviolent crime during the late teens and twenties in order to present information on patterns of criminal activity during a newly recognized developmental period of the life course, “emerging adulthood.”  相似文献   
55.
56.
57.
Editor's Note     
European Journal of Political Research -  相似文献   
58.
Many abused women use professional and community services and begin to talk to professionals about the abuse they have endured. This article presents and discusses results of a study of 270 abused women who used the services of professionals and service agencies. The article presents information on the frequency of contact and the perceived helpfulness of different professions. Also presented are the types of responses which were considered to be useful and ineffective. This study revealed that the most frequently contacted professions were not necessarily perceived to be the most helpful. Further, certain responses of the service providers were more frequently reported to have value.  相似文献   
59.
Bone fragments were stored in water for 2 years at room temperature and investigated serologically using the following methods: Absorption-elution, extraction of blood group substances and immunohistochemistry (PAP). All 3 methods gave essentially specific results for fresh bone tissue but with putrid bone tissue unspecific reactions were found predominantly with the absorption-elution and PAP techniques. In contrast, more specific reactions were obtained from the extracts although they were much weaker. From this it can be concluded that pure physical binding plays a substantial role in the unspecific reaction between antibodies and bone material. It is suggested that the relevant physical properties are altered by putrification.  相似文献   
60.
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