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   11135篇
  免费   604篇
各国政治   452篇
工人农民   402篇
世界政治   920篇
外交国际关系   345篇
法律   7395篇
中国共产党   1篇
中国政治   57篇
政治理论   2123篇
综合类   44篇
  2021年   67篇
  2020年   205篇
  2019年   256篇
  2018年   262篇
  2017年   331篇
  2016年   331篇
  2015年   267篇
  2014年   285篇
  2013年   1112篇
  2012年   256篇
  2011年   327篇
  2010年   301篇
  2009年   317篇
  2008年   307篇
  2007年   279篇
  2006年   303篇
  2005年   272篇
  2004年   263篇
  2003年   254篇
  2002年   259篇
  2001年   476篇
  2000年   431篇
  1999年   300篇
  1998年   196篇
  1997年   160篇
  1996年   127篇
  1995年   125篇
  1994年   150篇
  1993年   141篇
  1992年   204篇
  1991年   221篇
  1990年   206篇
  1989年   218篇
  1988年   206篇
  1987年   193篇
  1986年   236篇
  1985年   210篇
  1984年   163篇
  1983年   172篇
  1982年   122篇
  1981年   124篇
  1980年   89篇
  1979年   134篇
  1978年   79篇
  1977年   77篇
  1976年   72篇
  1974年   74篇
  1973年   67篇
  1972年   67篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Abstract.  The four theses of this paper are: (1) that an appropriate organizational form is used to design, define, and organize a functional unit of a legal system, (2) that the functional units of a legal system, contrary to the emphasis in Hart and Kelsen, consist of far more than rules, and include institutions, interpretive and other methodologies, sanctions and remedies, and more, (3) that frontal and systematic study of the forms of these units is a major avenue for advancing understanding of them as duly organized wholes, and, (4) that such study reveals that much credit is due these forms, along with complementary material or other components of the units, for values realized through law.  相似文献   
92.
93.
94.
95.
96.
Congress and the Drug Enforcement Administration have assigned certain psychoactive substances to one of five schedules, based on assumed or demonstrated abuse potential. Although formidable difficulties exist in assessing the hazards of drug use, some of these assignments do not appear consistent with empirical estimates. This mismatch of assignment and abuse potential -possibly due to "radical" political ideology - obscures significant differences in drug effects, and therefore stifles meaningful public participation in evaluating the benefits, risks, and proper use (if any) of available psychoactive substances.  相似文献   
97.
Alas poor yorick     
  相似文献   
98.
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   
99.
All records from the Danish Medicolegal Council concerning drivers suspected for drug influences were examined for the 5 year period 1981-1985. 461 records were included, 62 women and 399 men. In 250 cases drugs from more than one of ten groups had been taken thus making 786 combinations of drug/driving. The major drug group was benzodiazepines, accounting for 65% of all drug intake. Opioids also contributed substantially, found in 38% of the cases. A traffic accident had occurred in 180 (39%) of the records. Drivers who had been taking antidepressives were involved in an accident in 67%, significantly above the mean. For benzodiazepines, the corresponding percentage was 43%, while for opioids it was only 23%, significantly below the mean. This striking difference has been demonstrated in most of the studies concerning drugs in traffic. It may support the hypothesis that opioids do not necessarily make driving dangerous, as do antidepressives, barbiturates and especially benzodiazepines.  相似文献   
100.
In the current study the objective was to find to what extent a reliable determination of age at death is made possible by establishing the degree of aspartic acid racemization in the dentin of teeth. The results of the investigation of 46 teeth are in agreement with the values found by other authors. The method presented makes a reproducible and accurate estimation of age possible. We intend to elaborate and improve this promising method for determination of age at death. The relevant points are presented here.  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