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   30768篇
  免费   960篇
  国内免费   5篇
各国政治   1304篇
工人农民   1241篇
世界政治   2364篇
外交国际关系   1084篇
法律   18845篇
中国共产党   8篇
中国政治   215篇
政治理论   6346篇
综合类   326篇
  2020年   408篇
  2019年   479篇
  2018年   602篇
  2017年   720篇
  2016年   740篇
  2015年   529篇
  2014年   586篇
  2013年   2975篇
  2012年   782篇
  2011年   819篇
  2010年   670篇
  2009年   725篇
  2008年   842篇
  2007年   909篇
  2006年   876篇
  2005年   783篇
  2004年   790篇
  2003年   849篇
  2002年   736篇
  2001年   1188篇
  2000年   1052篇
  1999年   884篇
  1998年   504篇
  1997年   387篇
  1996年   377篇
  1995年   347篇
  1994年   424篇
  1993年   390篇
  1992年   589篇
  1991年   650篇
  1990年   596篇
  1989年   570篇
  1988年   588篇
  1987年   558篇
  1986年   597篇
  1985年   557篇
  1984年   470篇
  1983年   501篇
  1982年   402篇
  1981年   389篇
  1980年   286篇
  1979年   394篇
  1978年   277篇
  1977年   235篇
  1976年   205篇
  1975年   229篇
  1974年   255篇
  1973年   209篇
  1972年   200篇
  1971年   175篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
164.
A 22-year-old Korean soldier, who had received blows to the neck and epigastrium from an officer 10 h earlier, suddenly died after massive hematemesis. He had been in relatively good health except for episodes of blood-tinged vomiting approximately 5 and 7 months prior to this event. Postmortem examination revealed angiodysplasia involving the gastroesophageal junction, and the stomach was distended with blood. No abnormal findings were present around the whole viscera, and the duodenum was free of blood. The pathologic significance of upper gastrointestinal angiodysplasia as a potential source of bleeding and a chronologic correlation between the trauma and bleeding are discussed.  相似文献   
165.
166.
167.
European Journal of Law and Economics - In this article I try to find answers for three questions: Which functions are exercised by the Court of Audit in the Netherlands, and what kinds of...  相似文献   
168.
The primary aim of this paper is to review the literature on preadolescent friendships in order to examine the relationship between preadolescent friendships and social support in adulthood. Social supports are important to health, both directly and as a stress buffer. Few studies, however, have specifically examined adult social supports from the perspective of their developmental precursors and critical developmental periods. Some data indicate that the preadolescent period may be of particular importance to the development of adult social skills and ties. Observational and empirical studies of preadolescent peer relationships, and in particular best friendships, suggest unique and critical contributions to adult social relatedness. Present research is suggestive but is insufficient to validate preadolescence as a critical period in adult social relatedness. Our review has implications for better understanding the mechanisms by which preadolescent friendships effect adult social support—an important mediator of the effects of stress on health. Further longitudinal study is needed.Received Ph.D. from University of Maryland. Research interests are social supports and psychological responses to trauma and disaster.Received M.D. from Yale University. Research interests are social supports and traumatic stress.  相似文献   
169.
We tested competing hypotheses derived from Gottfredson and Hirschis (1990) general theory and Moffitt's (1993a) developmental theory of antisocial behavior. The developmental theory argues that different factors give rise to antisocial behavior at different points in the life course. In contrast, the general theory maintains that the factor underlying antisocial behavior (i.e., criminal propensity) is the same at all ages. To test these competing predictions, we used longitudinal data spanning from age 5 to age 18 for the male subjects in the Dunedin Multidisciplinary Health and Development Study. Using reports from three sources (parents, teachers, and the boys themselves), we estimated second-order confirmatory factor models of antisocial behavior. These models provided consistent support for the developmental theory, showing that separate latent factors underlie childhood and adolescent antisocial behavior. Moreover, we found that these childhood and adolescent factors related in ways predicted by Moffitt's developmental theory to four correlates of antisocial behavior: Childhood antisocial behavior was related more strongly than adolescent antisocial behavior to low verbal ability, by per activity, and negative/impulsive personality, whereas adolescent antisocial behavior was related more strongly than childhood antisocial behavior to peer delinquency. The two underlying latent factors also showed the predicted differential relations to later criminal convictions: Childhood antisocial behavior was significantly more strongly associated with convictions for violence, while adolescent antisocial behavior was significantly more strongly associated with convictions for nonviolent offenses.  相似文献   
170.
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