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   23136篇
  免费   1338篇
各国政治   1089篇
工人农民   1050篇
世界政治   1515篇
外交国际关系   769篇
法律   15586篇
中国共产党   2篇
中国政治   142篇
政治理论   4186篇
综合类   135篇
  2020年   476篇
  2019年   507篇
  2018年   650篇
  2017年   693篇
  2016年   775篇
  2015年   576篇
  2014年   636篇
  2013年   2459篇
  2012年   588篇
  2011年   623篇
  2010年   640篇
  2009年   661篇
  2008年   643篇
  2007年   655篇
  2006年   668篇
  2005年   560篇
  2004年   545篇
  2003年   495篇
  2002年   518篇
  2001年   873篇
  2000年   761篇
  1999年   636篇
  1998年   314篇
  1997年   245篇
  1996年   260篇
  1995年   248篇
  1994年   238篇
  1993年   235篇
  1992年   400篇
  1991年   432篇
  1990年   419篇
  1989年   396篇
  1988年   423篇
  1987年   399篇
  1986年   444篇
  1985年   423篇
  1984年   351篇
  1983年   329篇
  1982年   242篇
  1981年   234篇
  1980年   198篇
  1979年   319篇
  1978年   188篇
  1977年   156篇
  1976年   126篇
  1975年   171篇
  1974年   199篇
  1973年   156篇
  1972年   129篇
  1971年   117篇
排序方式: 共有10000条查询结果,搜索用时 487 毫秒
31.
32.
33.
34.
Past research has largely ignored the developmental changes within the child that account for the association between parenting and risk for delinquency. We used structural equation modeling and data from a longitudinal study of several hundred African‐American families to test the contentions of various theories regarding the sociocognitive and emotional factors that mediate the impact of parental behavior on a youth's risk for delinquency. Our findings largely supported the theories. The impact of monitoring/discipline was indirect through low self‐control and acceptance of deviant norms, whereas the effect of hostility/ rejection was indirect through low self‐control, hostile view of relationships, and acceptance of deviant norms. These two dimensions of parenting were no longer related either to affiliation with deviant peers or to conduct problems once the effects of these psychological characteristics were taken into account; the impact of these parenting practices was completely mediated by these four cognitive/affective variables. Contrary to expectation, however, these psychological factors did not mediate any of the relationship between caretaker involvement in antisocial behavior and child conduct problems.  相似文献   
35.
36.
37.
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   
38.
Data on bone tissue fractography are summarized and systematized. Possibilities of a microscopic fractography method in analysis of skeletal bone fractures in order to determine conditions of traumatic exposure were shown. Destruction of bone tissue is considered from the point of view of fragile and tough destruction using as a model solid body with crack at the top of which deformations of detachment, lateral and longitudinal shifts are acting. Morphologic features for different types of destruction were singled out. Use of these features may help to determine character and type of deformation at concrete areas of fracture during all destruction process.  相似文献   
39.
40.
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   
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