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   2479篇
  免费   121篇
各国政治   164篇
工人农民   123篇
世界政治   261篇
外交国际关系   130篇
法律   1182篇
中国政治   15篇
政治理论   705篇
综合类   20篇
  2023年   15篇
  2022年   6篇
  2021年   21篇
  2020年   50篇
  2019年   65篇
  2018年   78篇
  2017年   101篇
  2016年   83篇
  2015年   63篇
  2014年   88篇
  2013年   376篇
  2012年   83篇
  2011年   112篇
  2010年   68篇
  2009年   83篇
  2008年   71篇
  2007年   97篇
  2006年   96篇
  2005年   92篇
  2004年   84篇
  2003年   97篇
  2002年   89篇
  2001年   53篇
  2000年   55篇
  1999年   50篇
  1998年   50篇
  1997年   44篇
  1996年   33篇
  1995年   41篇
  1994年   36篇
  1993年   23篇
  1992年   29篇
  1991年   20篇
  1990年   24篇
  1989年   21篇
  1988年   27篇
  1987年   18篇
  1986年   15篇
  1985年   25篇
  1984年   17篇
  1983年   12篇
  1982年   12篇
  1981年   11篇
  1980年   12篇
  1979年   8篇
  1978年   8篇
  1977年   5篇
  1976年   8篇
  1974年   5篇
  1973年   5篇
排序方式: 共有2600条查询结果,搜索用时 15 毫秒
161.
In a longitudinal study on 115 early adolescents, the impact of major events, relationship stressors, and coping style in interaction with biological changes on depressive outcome in late adolescence were explored. Three developmental models proposed by Nolen-Hoeksema and Girgus (1994, Psychol. Bull. 115: 424–433), which attempt to explain the emergence of gender differences in adolescent depressive symptoms, were tested. Multiple regression analyses conducted to test Model 1 identified two etiological factors associated with gender differences of depression, namely, stress in the adolescent–mother relationship and a more negative body image. Tests of Model 2 revealed etiological factors which correlated with depression in adolescent girls but not adolescent boys. The correlational patterns of avoidant coping and body image emerged as relevant factors for Model 2. Finally, tests of Model 3 searched for factors which were more likely to be observed in adolescent girls than boys and which would put girls at risk should they interact with a third etiological factor. Early maturational timing emerged as a factor for Model 3.  相似文献   
162.
163.
Models of legislative organization frequently begin with the premise that the committee system serves the re-election interests of incumbent legislators. Attempts to substantiate this notion empirically have been unsuccessful. Nevertheless, the notion lives on, nourished by a stylized characterization of the committee system. In the standard model committees have jurisdictional monopolies over specialized policy areas and legislators gravitate toward those committees that deal most closely with the policy concerns of their constituents. Contrary to this simplifying characterization, the degree of monopoly control and policy specialization varies across standing committees in the us congress. Some committees have wide jurisdictions and attract members with diverse policy preferences. Jurisdictional overlap and resulting turf battles are common aspects of congressional sessions. We suggest here that these realities warrant a re-opening of the empirical investigation into the link between electoral success and committee characteristics. Our findings indicate that assignment to a committee with a relatively high degree of monopoly control increases a member's vote share, and that assignment to a narrowly focused (specialized) committee does not.  相似文献   
164.
Social representation   总被引:1,自引:0,他引:1  
Abstract This paper examines social representation in the European Parliament using a model which uses the demand, the supply and the structure of opportunities as factors explaining differential recruitment. Analysis of the experiences of candidates suggest that supply–side factors proved more strongly related to candidates gaining winnable seats than demand–side factors. Results also confirm the importance of institutional structures in widening or narrowing opportunities, and suggest the European Parliament will remain social unrepresentative in the foreseeable future, a characteristic that serves only to add to the already considerable problems of legitimacy in the European Union.  相似文献   
165.
166.
Where You Are     
Mark Doty 《耶鲁评论》1997,85(4):48-52
  相似文献   
167.
The authors report a case of aortic dissection and cardiac tamponade in a 29-year-old man after ingestion of ecstasy (methylenedioxymethamphetamine, MDMA) at a "rave" party. There was no history of hypertension, myxoid heart disease, or other risk factors for aortic dissection in the deceased, although a minor degree of cystic medial necrosis was noted on histologic examination of the aorta. Autopsy toxicology revealed low residual levels of MDMA in the blood about 48 hours after ingestion of the drug. This case report describes a probable association between MDMA ingestion and aortic dissection in a previously well young adult. The likely mechanisms are discussed, and the difficulties in diagnosing this complication are highlighted.  相似文献   
168.
The present study investigated the effect on witness confidence and accuracy of confusing questions often used by attorneys in court. Participants viewed a videotaped film and were individually questioned about the incident 1 week later. Half the participants were asked questions using six categories of confusing questions (negatives, double negatives, leading, multiple questions, complex syntax, and complex vocabulary); the remaining half were asked for the same information using simply phrased equivalents. Confusing questions reduced participant-witnesses' accuracy and suppressed confidence–accuracy relationships compared with the condition where simplified alternatives were asked. Witness performance was impaired by the fact that mock-witnesses rarely asked for a confusing question to be explained or qualified their answers. This experiment demonstrates the importance of ensuring that lawyers ask witnesses simple, clear, questions.  相似文献   
169.
Hair samples are useful as a matrix for drug testing because drugs can be detected in hair for longer periods than in blood or urine. The authors report a prospective comparison of the detection of cocaine and cocaethylene in routine postmortem biologic specimens to the detection of cocaine and cocaethylene in hair. The authors collected hair samples from various areas of the head in 53 autopsy cases, prepared them, and analyzed them by gas chromatography/mass spectrometry (GC/MS) for cocaine and cocaethylene. The authors compared the results of hair analysis with the results of toxicologic analysis performed on routine postmortem samples by enzyme multiplied immunoassay technique and GC/MS. Cocaine was found in either biologic fluids or in hair in 16 of 53 samples tested. Nine samples were positive for cocaine in both biologic fluids and hair. Five samples contained cocaine only in biologic fluids, and two contained cocaine only in hair. Cocaethylene was present in two cases. Drug screening of hair provides additional information in some autopsy cases, but the authors have not made hair analysis a routine practice. It may prove useful to save hair samples in all cases for later analysis if warranted by additional history or autopsy findings.  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