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   14259篇
  免费   421篇
各国政治   781篇
工人农民   575篇
世界政治   1145篇
外交国际关系   572篇
法律   8464篇
中国共产党   2篇
中国政治   182篇
政治理论   2855篇
综合类   104篇
  2020年   181篇
  2019年   237篇
  2018年   322篇
  2017年   328篇
  2016年   329篇
  2015年   259篇
  2014年   308篇
  2013年   1606篇
  2012年   365篇
  2011年   456篇
  2010年   340篇
  2009年   370篇
  2008年   404篇
  2007年   373篇
  2006年   358篇
  2005年   307篇
  2004年   361篇
  2003年   350篇
  2002年   257篇
  2001年   623篇
  2000年   577篇
  1999年   457篇
  1998年   219篇
  1997年   176篇
  1996年   159篇
  1995年   152篇
  1994年   152篇
  1993年   138篇
  1992年   269篇
  1991年   282篇
  1990年   266篇
  1989年   255篇
  1988年   267篇
  1987年   267篇
  1986年   255篇
  1985年   232篇
  1984年   228篇
  1983年   231篇
  1982年   146篇
  1981年   138篇
  1980年   111篇
  1979年   163篇
  1978年   117篇
  1977年   91篇
  1976年   92篇
  1975年   90篇
  1974年   95篇
  1973年   98篇
  1972年   88篇
  1971年   85篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
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   
32.
33.
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations.  相似文献   
34.
35.
36.
37.
38.
We consider the contributions made by Robert H. Bork's Coercing Virtue (2003) and Anne-Marie Slaughter's A New World Order (2004) to the ongoing debate over the citation of foreign law in United States courts. While empirically minded sociolegal scholars might be tempted to dismiss these books as mere op-eds, that would be a mistake. Taken with the spate of other recent work, they supply the makings of an agenda for rigorous research devoted to understanding the exchange of law among nations.  相似文献   
39.
40.
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   
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