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   9257篇
  免费   267篇
各国政治   445篇
工人农民   319篇
世界政治   854篇
外交国际关系   443篇
法律   5020篇
中国共产党   2篇
中国政治   87篇
政治理论   2296篇
综合类   58篇
  2021年   67篇
  2020年   112篇
  2019年   172篇
  2018年   236篇
  2017年   224篇
  2016年   224篇
  2015年   140篇
  2014年   209篇
  2013年   1160篇
  2012年   213篇
  2011年   251篇
  2010年   216篇
  2009年   245篇
  2008年   267篇
  2007年   248篇
  2006年   244篇
  2005年   239篇
  2004年   264篇
  2003年   230篇
  2002年   230篇
  2001年   400篇
  2000年   354篇
  1999年   257篇
  1998年   137篇
  1997年   137篇
  1996年   90篇
  1995年   104篇
  1994年   106篇
  1993年   89篇
  1992年   159篇
  1991年   191篇
  1990年   165篇
  1989年   176篇
  1988年   141篇
  1987年   160篇
  1986年   137篇
  1985年   135篇
  1984年   127篇
  1983年   128篇
  1982年   98篇
  1981年   121篇
  1980年   69篇
  1979年   113篇
  1978年   78篇
  1976年   57篇
  1975年   54篇
  1974年   67篇
  1973年   73篇
  1972年   51篇
  1971年   46篇
排序方式: 共有9524条查询结果,搜索用时 0 毫秒
21.
Decomposition studies were conducted using two carcasses of domestic pigs, Sus scrofa L., 8.4 kg and 15.1 kg in weight, to determine the effects of carcass size on the rate of decomposition, composition of the arthropod fauna, and succession patterns. A total of 46 arthropod taxa were recovered during this study. No size-related differences were observed between carcasses with respect to composition of the arthropod fauna or patterns of succession. A greater number of arthropods were observed attracted to the 15.1-kg carcass, and the rate of decomposition observed was more rapid for the 15.1-kg carcass than for the 8.4-kg carcass. Internal temperatures of the 8.4-kg carcass were more directly related to external ambient temperatures during the fresh and bloated stages of decomposition. During the decay stage, both carcasses generated internal temperatures significantly above ambient temperatures. Following this stage, internal temperatures fell to approximate ambient temperatures during the postdecay and remains stages.  相似文献   
22.
23.
24.
25.
This article considers two recent books in the history of childhood, youth, and the law: Holly Brewer, By Birth or Consent and Stephen Robertson, Crimes Against Children . It argues that these works mark the emergence of age as a category of analysis in sociolegal studies. It calls for further investigations in the legal history of childhood and youth, outlines several areas of interest, and suggests that attention to age will alter how scholars look at the law by complicating key concepts such as innocence, authority, and citizenship. Studies of age and the law could benefit from cross-cultural and transnational approaches.  相似文献   
26.
Banks are “special” financial institutions generating distinct corporate governance challenges. The present paper examines the relationship between two of the most pertinent corporate governance factors—that is, the size of the Board of Directors and the proportion of non-executive directors—and firm performance on a sample of 58 large European banks over the period 2002–2004. The empirical analysis embraces a number of bank-specific variables. Our results reveal that bank profitability is negatively related to the size of the Board of Directors, while the impact of Board composition, although positive in all models, is, in most cases, insignificant. The results are robust after controlling for firm-specific variables.   相似文献   
27.
Klagen gegen einen internationalen Sportverband, die auf Feststellung der Unwirksamkeit einer Sperre eines bei einem nationalen Sportverband besch?ftigten Trainers von Wettbewerben dieses Sportverbandes und auf Unterlassung von Handlungen, die eine Akkreditierung verhindern bzw erschweren, gerichtet sind, unterliegen der ausschlie?lichen inl?ndischen Gerichtsbarkeit des Sitzstaates; eine Verbindung solcher Klagen mit einer gegen den nationalen Verband gerichteten gleichartigen Klage ist daher unzul?ssig. – Eine damit zusammenh?ngende Schadenersatzklage gegen den internationalen Verband steht auch nicht in dem von Art 6 Nr 1 LGVü geforderten Zusammenhang mit einer Klage gegen den nationalen Verband wegen Aufl?sung des Trainervertrages aufgrund der Sperre.  相似文献   
28.
COMPSTAT, the latest innovation in American policing, has been widely heralded as a management and technological system whose elements work together to transform police organizations radically. Skeptical observers suggest that COMPSTAT merely reinforces existing structures and practices. However, in trying to assess how much COMPSTAT has altered police organizations, research has failed to provide a broader theoretical basis for explaining how COMPSTAT operates and for understanding the implications of this reform. This article compares two different perspectives on organizations—technical/rational and institutional—to COMPSTAT's adoption and operation in three municipal police departments. Based on fieldwork, our analysis suggests that relative to technical considerations for changing each organization to improve its effectiveness, all three sites adopted COMPSTAT in response to strong institutional pressures to appear progressive and successful. Furthermore, institutional theory better explained the nature of the changes we observed under COMPSTAT than the technical/rational model. The greatest collective emphasis was on those COMPSTAT elements that were most likely to confer legitimacy, and on implementing them in ways that would minimize disruption to existing organizational routines. COMPSTAT was less successful when trying to provide a basis for rigorously assessing organizational performance, and when trying to change those structures and routines widely accepted as being "appropriate." We posit that it will take profound changes in the technical and institutional environments of American police agencies for police departments to restructure in the ways anticipated by a technically efficient COMPSTAT.  相似文献   
29.
Serious conflicts can arise when contacts between a child and a parent require supervision unless specific guidelines and objectives are clarified for all involved parties. This article discusses supervision objectives, the importance of maintaining the parent-child relationship, instances warranting recommendation for no parental contact, qualifications of the supervisor, and practical guidelines for supervision.  相似文献   
30.
A simple and sensitive method is described for quantitative analysis of chlorpromazine in blood, serum, urine and tissue homogenate. The chlorpromazine cation radical produced by adding perchloric acid and 2,3-dichloro-5,6-dicyano-p-benzoquinone to the sample can be detected by the ESR method at room temperature. The sensitivity limit is 10 ng, that is, 20 μl of the solution containing 0.5 μg chlorpromazine/ml. The time needed for the measurement is within 10 min. The chlorpromazine radical thus produced is very stable; for example, 95% of the radical was observed after 24 h. The advantage of this method is discussed by comparing with the ordinary spectrophotometry which requires the purification of the sample.  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