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   7596篇
  免费   193篇
各国政治   421篇
工人农民   296篇
世界政治   686篇
外交国际关系   370篇
法律   4330篇
中国政治   70篇
政治理论   1590篇
综合类   26篇
  2021年   47篇
  2020年   93篇
  2019年   136篇
  2018年   178篇
  2017年   171篇
  2016年   175篇
  2015年   108篇
  2014年   171篇
  2013年   921篇
  2012年   179篇
  2011年   212篇
  2010年   168篇
  2009年   207篇
  2008年   223篇
  2007年   216篇
  2006年   197篇
  2005年   177篇
  2004年   232篇
  2003年   173篇
  2002年   152篇
  2001年   345篇
  2000年   317篇
  1999年   224篇
  1998年   122篇
  1997年   118篇
  1996年   78篇
  1995年   92篇
  1994年   83篇
  1993年   82篇
  1992年   146篇
  1991年   162篇
  1990年   158篇
  1989年   151篇
  1988年   139篇
  1987年   152篇
  1986年   120篇
  1985年   118篇
  1984年   113篇
  1983年   97篇
  1982年   66篇
  1981年   88篇
  1980年   51篇
  1979年   81篇
  1978年   46篇
  1977年   35篇
  1975年   41篇
  1974年   52篇
  1973年   60篇
  1972年   41篇
  1971年   36篇
排序方式: 共有7789条查询结果,搜索用时 15 毫秒
81.
82.
Using merged administrative data from welfare reform evaluations in three states, we estimate the effects of child care subsidy use on the length of time it takes for a welfare applicant to move into substantial employment. Findings show that the use of a child care subsidy during an unemployed or marginally employed spell of welfare receipt is associated with between a 0.6 and 1.7 quarter (or 11% to 34%) reduction in the time to substantial employment in two of the three state samples. The positive influence of subsidy use on transitions to substantial employment is strongest for those welfare applicants with the lowest earnings who are mixing welfare and work prior to subsidy receipt.  相似文献   
83.
84.
85.
Although past research has developed scales for the incidence, prevalence, and fear of student-on-student victimization (SSV), little is known about the scaling of perceived risk (i.e., the cognitive appraisal of the chances of experiencing SSV). Hence, this study examined self-report survey data for the perceived risk of SSV as measured in the Adolescent Index for School Safety (AISS). Children in grades 7 through 10 (n=337) in a single Florida public school completed the AISS. Factor analyses using Maximum Likelihood Estimation with Oblimin Rotation identified nine unique factors for perceived risk. Reliability analyses found standardized Cronbach Alphas that ranged from .64 to .91, and seven out of the nine identified scales were above .80, which suggested good to excellent internal consistency. Future research should examine the content validity, construct validity, and predictive validity for the AISS and other self-report surveys of SSV dynamics. This publication was made possible by a grant [#97-MU-FX-KO12 (S-l)] from the Office of Juvenile Justice and Delinquency Prevention (O.J.J.D.P.), United States Department of Justice (U.S.D.O.J.). This grant is administered through the Hamilton Fish National Institute on School and Community Violence at George Washington University. This specific study was developed and implemented by staff at: 1) East Carolina University’s Department of Criminal Justice; and 2) Florida State University’s Center for Educational Research and Policy Studies. All points of view and opinions in this paper are those of the authors and do not necessarily represent the official position or policies of East Carolina University, Florida State University, the Hamilton Fish National Institute on School and Community Violence, the O.J.J.D.P., or the U.S.D.OJ. The authors would also like to thank Dr. Bill Doerner and Jennifer Jolley for their support, editorial feedback, and insightful comments regarding earlier drafts of this paper.  相似文献   
86.
87.
Assessment of competency for execution presents two compelling ethical questions for mental health professionals: whether clinicians can ethically provide such assessment, and if so, how it should be done in order to maximize quality and minimize ethical conflict. In this article we address the issue of whether to participate and, if so, how. The question of whether to participate is discussed by summarizing the arguments for and against participation and offering guidelines for making a decision. The question of how to proceed is discussed in two contexts: preadjudication (before a formal decision about competency) and postadjudication (following a determination of "incompetent" and transfer of the offender to another facility for treatment and further assessment). Finally, recommendations are made regarding research that would improve the quality of execution competency assessments.  相似文献   
88.
89.
90.
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