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   19030篇
  免费   378篇
各国政治   525篇
工人农民   1587篇
世界政治   840篇
外交国际关系   617篇
法律   11553篇
中国共产党   35篇
中国政治   145篇
政治理论   3967篇
综合类   139篇
  2023年   52篇
  2021年   68篇
  2020年   179篇
  2019年   167篇
  2018年   1474篇
  2017年   1438篇
  2016年   1286篇
  2015年   330篇
  2014年   287篇
  2013年   1014篇
  2012年   463篇
  2011年   1197篇
  2010年   1201篇
  2009年   857篇
  2008年   1072篇
  2007年   1029篇
  2006年   379篇
  2005年   396篇
  2004年   486篇
  2003年   413篇
  2002年   295篇
  2001年   378篇
  2000年   344篇
  1999年   274篇
  1998年   183篇
  1997年   133篇
  1996年   162篇
  1995年   145篇
  1994年   161篇
  1993年   133篇
  1992年   200篇
  1991年   253篇
  1990年   217篇
  1989年   200篇
  1988年   225篇
  1987年   203篇
  1986年   221篇
  1985年   197篇
  1984年   177篇
  1983年   174篇
  1982年   108篇
  1981年   127篇
  1980年   102篇
  1979年   108篇
  1978年   96篇
  1977年   91篇
  1976年   66篇
  1975年   65篇
  1974年   66篇
  1973年   78篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
A new solid-phase extraction procedure for the determination of cocaine and benzoylecgonine in amniotic fluid, using high flow co-polymeric sorbents is reported. The recoveries of cocaine and benzoylecgonine within the range 0.1-1 mg/l were 95.7% and 50.3%, respectively. The use of high-flow sorbents allowed the easy extraction of amniotic fluid regardless of sample viscosity or physical nature. The use of these solid-phase columns provided many advantages over the more commonly used solvent extraction, including an increase in extraction speed and efficiency, reduced operator time, reduced solvent use and disposal volumes and exceptional extract quality. Further, the determination of amniotic fluid obtained from pregnant cocaine users may provide important information about handling of cocaine by the fetus at various gestational ages. The procedure was successfully applied to amniotic fluid from suspected cocaine abusers.  相似文献   
92.
93.
The terminology of “civil society” has gained currency in recent discussions of democratic movements around the globe. Although less grandiose in its implications than claims about the “end of history,” this terminology does suggest a certain universality in human experience. We argue that this claim of universality is warranted, but also problematic. We establish the relevance of our argument in reference to the literatures in African and Indian studies. We note first that the common employments of the concept ignore the theoretical and historical specificity of civil society: civil society is used to label any group or movement opposed to the state, regardless of its intent or character, or used so generically that it is indistinguishable from the term “society.” Instead, we argue that civil society is a sphere of social life, involving a stabilization of a system of rights, constituting human beings as individuals, both as citizens in relation to the state and as legal persons in the economy and the sphere of private association. Thus, we link the wide resonance of the concept to its embeddedness in the logic of liberal capitalist society and the capitalist global division of labor. This conception allows us to see that, although the emergence of a sphere of civil society involves at least minimal democranization and is supportive of struggles for further democratization, the status of democracy is also made quite problematic by the tensions endemic to liberal capitalism and the processes of uneven development within international capitalism. Our usage also allows us to distinguish more clearly movements dedicated to the construction of civil society from those that may count actually as counter-civil society movements. David L. Blaney received his M.A. and Ph.D. at the Graduate School of International Studies, University of Denver. He is on leave from Hanover College, Hanover, Indiana as a visiting scholar for the 1993–94 academic year at The Elliott School of International Affairs, George Washington University, Washington, D.C. 20052. His main research interests include international political economy, culture and international relations theory, and democratic theory. Mustapha Kamal Pasha received his M.A. and Ph.D. at the Graduate School of International Studies, University of Denver. Currently, he is an assistant professor in the School of International Service, American University, Washington, D.C. 20016. His main research interests include international political economy, with particular regard to the Third World, and South Asian politics.  相似文献   
94.
Alcoholism and drug addiction affects the entire family. At least 22 million Americans have been raised in an alcoholic environment. Parental alcoholism and/or addiction can have profound emotional and psychological scars on the children. These homes are often characterized by emotional and or physical insecurity, loneliness, terror and inconsistency. The children from these homes often are extremely insecure have low self-esteem, and have a variety of emotional problems. Adolescents from addictive homes are over-represented in juvenile court as status offenders, delinquents and abuse and neglect cases. This article will discuss this issue and implications for the juvenile justice system and personnel working with these youth  相似文献   
95.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses.  相似文献   
96.
97.
A case of kidnapping involving the concept of paternity testing is described. The couple arrested and charged with kidnapping stated the child in their possession was their biological daughter. Serological tests were performed on liquid blood samples in an effort to determine if the couple could have been the biological parents of the child. Two genetic inconsistencies were discovered in the 15 blood marker systems analyzed.  相似文献   
98.
If categories of 'race' and nationality are social and historical constructions laden with irrefutable meaning and consequences, then ethnic identities, like any other forms of identity, are means to other ends that may or may not be particular. Twentieth‐century indigenist history in Brazil reveals how the cultural politics of indigenism and nationalism can coalesce in a tautological politics of identity that undermines individual liberty and democratic heterogeneity. The concepts 'post‐indigenism,'post‐nationalism' and 'post‐identity' point to the strategic suspension of the infinite heterogeneity of the political subject as a means to widen the ground of shared experience and common interests beyond the realm of hollow and oppressive essentialisms.  相似文献   
99.
The present study examines the extent to which neighborhood and social psychological influences predict childhood violence among 867 African‐American youth. The results showed that neighborhood affluence was the only neighborhood‐level variable to exert a significant influence on childhood violence. Furthermore, childhood violence was significantly related to social psychological influences, such as adopting a street code, associating with violent peers, parental use of violence, and quality parenting. Overall, the findings suggested that simply living in a violent neighborhood does not produce violent children, but that family, peer, and individual characteristics play a large role in predicting violence in childhood.  相似文献   
100.
The social development model (SDM) is a theory of behavior that has proven useful in explaining the etiology of delinquency, violence, and substance use among adolescents as well as early antisocial behavior among pre-adolescents. A further test of the model is its generalizability across population groups. A section of the SDM representing prosocial influences in the etiology of problem behavior was compared for boys and girls and for children from low- and non low-income families using three waves of child, parent and teacher survey data on a sample of 851 elementary school students. Multiple group structural equation modeling was used to assess differences across groups in both measurement of model constructs and hypothesized structural paths between constructs. The results indicate overall similarity in the reliability of measurement models and validity of structural models.  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