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   781篇
  免费   42篇
各国政治   48篇
工人农民   70篇
世界政治   67篇
外交国际关系   63篇
法律   405篇
中国政治   10篇
政治理论   156篇
综合类   4篇
  2023年   11篇
  2022年   4篇
  2021年   11篇
  2020年   31篇
  2019年   24篇
  2018年   39篇
  2017年   47篇
  2016年   43篇
  2015年   30篇
  2014年   32篇
  2013年   84篇
  2012年   30篇
  2011年   22篇
  2010年   29篇
  2009年   26篇
  2008年   20篇
  2007年   35篇
  2006年   43篇
  2005年   28篇
  2004年   24篇
  2003年   23篇
  2002年   27篇
  2001年   18篇
  2000年   12篇
  1999年   10篇
  1998年   10篇
  1997年   5篇
  1995年   3篇
  1994年   5篇
  1993年   2篇
  1992年   6篇
  1991年   8篇
  1990年   8篇
  1989年   5篇
  1988年   7篇
  1987年   4篇
  1986年   8篇
  1985年   12篇
  1984年   5篇
  1983年   5篇
  1982年   6篇
  1980年   1篇
  1979年   4篇
  1978年   3篇
  1977年   4篇
  1975年   2篇
  1974年   1篇
  1973年   3篇
  1972年   1篇
  1969年   1篇
排序方式: 共有823条查询结果,搜索用时 15 毫秒
161.
The presence of drugs excreted from the body with the perspiration (without stimulation of the sweat glands) and deposed in the linens, was investigated. Linens were obtained from addicts and from smokers. The investigations demonstrated that cocaine, nicotine, cotinine and methadone excreted with the sweat are deposed in the linens. The drugs measurements were performed by radioimmunoassay and revealed by GC/MS.  相似文献   
162.
163.
The polymerase chain reaction (PCR) can be used for genetic typing of minute amounts of biological stains. This is achieved by in vitro amplification of a well-defined and genetically polymorphic human genomic DNA sequence. Using the HLA-DQ alpha system, a population study was carried out among 212 unrelated individuals of German origin. The usefulness of this system is discussed by presenting examples of its application in forensic casework, i.e. the analysis of mixed (male/female) body fluids as well as segregation studies on embryonic and paraffin-embedded tissue samples.  相似文献   
164.
165.
Recent research on European integration has largely profited from the institutionalist turn in political science. Theoretical progress has, however, been hampered by the diverse understandings of this new research tradition. This paper tries to tackle the conceptual diversity in a positive way. We first analyze the neo–institutionalist turn in political science and European studies and then move on to a detailed analysis and comparison of the three competing approaches — sociological, historical, and rational choice institutionalism. Next, we will show that the main differences are as much epistemological as theoretical. A convergence towards a unifying institutionalist approach can thus only be possible if some sort of a methodological convergence takes place. We sketch how a synthesis between the competing schools might appear.  相似文献   
166.
167.
The presence of methadone was investigated in 24-h perspiration samples obtained from patients receiving daily maintenance doses of the drug. The samples were collected from the axillary region. The concentrations measured by radioimmunoassay ranged from 8.3 ng/cm2 per 24 h up to 25.3 ng/cm2 per 24 h. The concentrations determined by RIA are the sum of methadone and its metabolites. The presence of the drug in the perspiration samples were also revealed by GC/MS.  相似文献   
168.
Nation‐building is an age‐old process being implemented in new ways. It consists of two separate aspects: state‐building implemented by external actors and identity‐building implemented by grassroots actors within the state itself. However, a functioning state is a necessary precondition for identity‐building because it allows for the development of a civic identity that can incorporate group identities and create a shared sense of community. When a unifying and legitimate state structure is absent, group identifications will remain strong and counteract internal efforts at nation‐building. Unfortunately, the record of nation‐building when understood as both state‐ and identity‐building is relatively poor. The failure of international efforts to create stable states inhibits development of a civic identity and reinforces fragmentation. That in turn brings the longevity of the state into question by raising the possibility that dissatisfied groups will again turn to violence. Learning how to develop both aspects of nation‐building more effectively is an important challenge for international actors.  相似文献   
169.
170.
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