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   72033篇
  免费   3380篇
各国政治   4728篇
工人农民   2956篇
世界政治   6392篇
外交国际关系   4089篇
法律   33927篇
中国共产党   9篇
中国政治   796篇
政治理论   21549篇
综合类   967篇
  2021年   432篇
  2020年   1201篇
  2019年   1575篇
  2018年   1765篇
  2017年   2089篇
  2016年   2300篇
  2015年   1890篇
  2014年   2165篇
  2013年   11053篇
  2012年   1691篇
  2011年   1832篇
  2010年   1896篇
  2009年   2140篇
  2008年   1887篇
  2007年   1905篇
  2006年   2025篇
  2005年   1892篇
  2004年   1789篇
  2003年   1581篇
  2002年   1642篇
  2001年   1652篇
  2000年   1440篇
  1999年   1302篇
  1998年   1160篇
  1997年   1035篇
  1996年   999篇
  1995年   969篇
  1994年   971篇
  1993年   989篇
  1992年   1023篇
  1991年   1061篇
  1990年   1000篇
  1989年   1041篇
  1988年   1017篇
  1987年   1038篇
  1986年   1044篇
  1985年   1113篇
  1984年   994篇
  1983年   1036篇
  1982年   912篇
  1981年   861篇
  1980年   674篇
  1979年   715篇
  1978年   598篇
  1977年   552篇
  1976年   501篇
  1975年   421篇
  1974年   439篇
  1973年   430篇
  1972年   375篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
151.
152.
153.
This paper addresses the relationship between accumulated knowledge and U.S. policy dealing with failed states and terrorism. The central thesis is threefold: (1) that more was known about the possible linkages between failing states and terrorism than appears in pre-9/11 U.S. policies; (2) that since 9/11 some important realignment of knowledge and practice has occurred, but it remains partial and incomplete; and (3) that new knowledge, especially about the policies to sustain and promote legitimate governance, needs to be generated in order to support an effective grand strategy for addressing the threats and challenges of the twenty-first century. The paper recommends such a grand strategy and, in addition to the required new knowledge, a significant reorganization of the U.S. national security policy-making apparatus. International studies curricula appear well suited for contributing to that new knowledge and the practitioners we require.  相似文献   
154.
155.
156.
157.
Divorce, although a statistical norm, is a developmental trauma to the children involved. This article looks at the two-camp emotional environment of a divorcing family and its effect on the formation of a child's identity. By examining developmental ages, chosen according to divorce research, the author attempts to show how the interspouse emotional cathexes negatively affect a child's sense of self in ways specific to the child's age at the divorce.  相似文献   
158.
From a conflict resolution perspective, it is clear why the child support guidelines are not going to reduce the adequacy and compliance gaps in child support payment conflicts between parents. As it stands, the conflict over equally sharing child support is destructive rather than positive. The guidelines do not reframe the conflict for the parents, enabling them to believe the interests of children are more important than their own interests to win the child support battle. To transform conflict from destructive to positive, the elements of conflict–expression of the conflict, scarce resources and rewards, and interdependency–must be transformed. It is argued that the guidelines do not transform the conflict but facilitate it. Courts and attorneys are also significant players in the child support conflict.  相似文献   
159.
Production function estimates are provided for Soviet industrial production and gross national product for the period 1950–86. A variety of alternative specifications is tested, including Cobb-Douglas, constant elasticity of substitution and variable elasticity of substitution production functions, and an error correction mechanism is used to investigate the long-run properties of the estimated equation. The structural stability of the estimates is also examined. Constant-returns-to-scale Cobb-Douglas production functions suggest that the rate of total factor productivity growth in the Soviet economy has declined steadily over time, becoming negative sometime in the period between 1970 and 1980. However the extensive statistical tests can doubt on the validity of any production function estimated on Soviet data.  相似文献   
160.
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning.  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