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   423篇
  免费   14篇
各国政治   15篇
工人农民   10篇
世界政治   37篇
外交国际关系   23篇
法律   208篇
中国政治   1篇
政治理论   133篇
综合类   10篇
  2023年   2篇
  2022年   4篇
  2021年   5篇
  2020年   6篇
  2019年   7篇
  2018年   14篇
  2017年   12篇
  2016年   12篇
  2015年   8篇
  2014年   10篇
  2013年   72篇
  2012年   7篇
  2011年   4篇
  2010年   11篇
  2009年   8篇
  2008年   11篇
  2007年   12篇
  2006年   15篇
  2005年   10篇
  2004年   13篇
  2003年   12篇
  2002年   18篇
  2001年   7篇
  2000年   6篇
  1999年   6篇
  1998年   6篇
  1997年   10篇
  1996年   12篇
  1995年   3篇
  1994年   7篇
  1993年   6篇
  1992年   6篇
  1991年   10篇
  1990年   9篇
  1989年   8篇
  1988年   4篇
  1987年   2篇
  1986年   2篇
  1985年   7篇
  1984年   5篇
  1983年   7篇
  1982年   9篇
  1981年   6篇
  1979年   2篇
  1978年   7篇
  1977年   2篇
  1976年   2篇
  1975年   4篇
  1974年   3篇
  1973年   4篇
排序方式: 共有437条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
35.
This paper examines the instrumental networks established between organized criminals and national politicians. Its major focus centers on the International Brotherhood of Teamsters, the Department of Labor, and the Reagan Administration. We explore the organized crime influence that affected President Reagan's selection of Raymond Donovan as Secretary of Labor. The choice of Donovan resulted in several related investigations into Donovan's association with organized criminals primarily in the construction industry in New Jersey and New York. We explain and critique the investigations thereby establishing the instrumental quality of the networks and the politics of law enforcement. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
36.
Two groups of parents were tracked for 2 years following their divorce: a group of 89 who attended a mandatory divorce education class and a comparison group of 23 who did not. The two groups did not differ in any assessed demographic or family characteristics. At the follow-up assessment, the parents who attended the class had relitigated (over all issues) less than half as often than those who had not attended the class (1.61 vs. 3.74). Moreover, rate of relitigation was related to mastery of skills learned in the class. The results are discussed in terms of the needs for outcome evaluation and design of education programs for divorcing parents.  相似文献   
37.
38.
The European Community has set itself the stringent policy target of halting all biodiversity loss by 2010. It intends to achieve this target by following a dual strategy. On the one hand, the 1979 Wild Birds Directive and 1992 Habitats Directive are designed to protect important sites housing vulnerable wildlife. On the other hand, biodiversity protection is to be integrated into all other Community policies. The Community views the Common Agricultural Policy as having a vital role in both areas. It provides a mechanism through which much needed Community funding can be channelled into the management of protected wildlife sites. Equally, it also has an important influence upon biodiversity in the wider countryside. This article examines the regulatory measures that have been taken to integrate biodiversity protection into the Community's agricultural policies and assesses whether they are likely to be sufficient to enable the Community to meet its 2010 target.  相似文献   
39.
A series of side chain regioisomers of 3-methoxy-4-methyl- and 4-methoxy-4-methyl-phenethylamines have mass spectra essentially equivalent to the controlled drug substance 3,4-methylenedioxymethamphetamine (3,4-MDMA), all have molecular weight of 193 and major fragment ions in their electron ionization mass spectra at m/z 58 and 135/136. The acetyl, propionyl and trifluoroacetyl derivatives of the primary and secondary regioisomeric amines were prepared and evaluated in GC–MS studies. The mass spectra for these derivatives were significantly individualized and the resulting unique fragment ions allowed for specific side chain identification. The trifluoroacetyl derivatives provided more fragment ions for molecular individualization among these regioisomeric substances. These trifluoroacetyl derivatives showed excellent resolution on a non-polar stationary phase such as Rtx-1.  相似文献   
40.
Data from the 50 states for 1975 are analyzed to try to separate the presumed reciprocal effects on each other of crime rates and incarceration rates. Two-stage least-squares regression shows no significant effect of crime on incarceration nor of incarceration on crime. Incarceration rates are affected mainly by the percentage of blacks in the state population. Crime rates are significantly influenced by urbanization, region, mean income, and unemployment.  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