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   20686篇
  免费   258篇
各国政治   689篇
工人农民   789篇
世界政治   1426篇
外交国际关系   775篇
法律   12863篇
中国共产党   35篇
中国政治   173篇
政治理论   4024篇
综合类   170篇
  2021年   131篇
  2020年   339篇
  2019年   363篇
  2018年   421篇
  2017年   515篇
  2016年   556篇
  2015年   468篇
  2014年   491篇
  2013年   1783篇
  2012年   464篇
  2011年   569篇
  2010年   474篇
  2009年   560篇
  2008年   595篇
  2007年   577篇
  2006年   578篇
  2005年   538篇
  2004年   513篇
  2003年   463篇
  2002年   463篇
  2001年   758篇
  2000年   702篇
  1999年   527篇
  1998年   328篇
  1997年   257篇
  1996年   266篇
  1995年   232篇
  1994年   275篇
  1993年   249篇
  1992年   375篇
  1991年   441篇
  1990年   389篇
  1989年   382篇
  1988年   404篇
  1987年   376篇
  1986年   420篇
  1985年   393篇
  1984年   312篇
  1983年   320篇
  1982年   217篇
  1981年   238篇
  1980年   186篇
  1979年   223篇
  1978年   166篇
  1977年   147篇
  1976年   134篇
  1975年   113篇
  1974年   133篇
  1973年   144篇
  1972年   108篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
Abstract. In an attempt to tighten up its financial systems and improve control of expenditures, the Canadian federal government has set up a new office, that of the Comptroller General. One of this Office's responsibilities is to administer the Treasury Board's policy on program evaluation, which says that all government programs should be periodically reviewed for their effectiveness in meeting goals and for the efficiency with which they are managed. The paper describes the Office's approach to program evaluation, reviews program evaluation policy in three other countries and discusses the principles and practical problems which limit the application of evaluation research. Evaluation activity in Canada is endangered in its cradle by two threats: the tendency of proponents to over-exuberance; and the cynics' view that the activity is of such limited applicability that potential savings are negligible. A third problem is a tendency to fuse together policy-related and management-related assessment activity. Evaluation activity conducted from the operational management point of view which takes program goals for granted will surely result in sequences of small victories and economies. This is worth doing well. But the dramatic import of effectiveness evaluation as a ‘bottom line’ for judging the worth of whole programs — that is, as a policy tool — should not be allowed to generate false expectations about the scope for improvement in routine management of the public service. Sommaire. En vue de fortifier ses systèmes financiers et d'améliorer le contrôle exercé sur ses dépenses, le gouvemement fédéral canadien a créé un nouveau poste, celui du Contrôleur général. Une des responsabilités de cette function est d'administrer la politique du Conseil du trésor en matière d'évaluation de programmes. Cette politique exige que les programmes gouvernementaux soient évalués périodiquement afin de déterminer leur efficacitéà rencontrer leurs objectifs ainsi que la capacité de rendement de leur gestion. Ce document décrit l'approche du Bureau du Contrôleur général en matière d'évaluation de programmes; examine les politiques correspondantes dans trois autres pays; et discute des principes et des problèmes pratiques qui limitent l'applicabilité de l'évaluation en recherche.  相似文献   
164.
Alcohol--orally given in concentrations from 1 to 4 g/kg body-weight--leads to a reduction of mast cells in the guinea pig lung. At the same time a minor decrease of histamine concentration was observed. The incompatibility reaction with alcohol after disulfiram intake (DAR) shows an additional degranulation oft mast cells of the lungs and decrease of histamine-content. So far, there seems little difference between the influence of disulfiram alone and the DAR. Besides thrombocytes and basophile leucocytes, the mast cells of the lung are responsible for the release of histamine and serotonine during higher alcohol concentrations and alcohol-disulfiram-reactions. We think that the intolerance phenomena of humans after alcohol--f.e. in form of flush-reaction--is at least partly related to the concomitant influence oft mast cell-substances.  相似文献   
165.
166.
167.
168.
169.
Gender and gender-role orientation differences were explored on adolescents' coping with peer stressors. Eighth-grade and ninth-grade public junior high school students (N = 285) completed the COPE, reporting the strategies they recently used to deal with a stressful peer-related situation. Measures of gender-role orientation (Bem Sex-Role Inventory) and demographic information also were obtained. Factor analysis of the COPE revealed 4 distinct coping factors: active, avoidant, acceptance, and emotion-focused. The most frequently reported stressful event was arguments/fights with same-sex friends. Girls reported more arguments/fights with opposite-sex friends. Boys reported more physical fights and threats. Students' ratings of how much the situation mattered were used as a covariate in a MANCOVA to compare coping by gender and gender-role orientation, to control for perceived stressfulness of situations. Significant gender-role orientation differences were found for active, acceptance, and emotion-focused coping.  相似文献   
170.
Voting May Be Habit-Forming: Evidence from a Randomized Field Experiment   总被引:1,自引:2,他引:1  
Habit is a frequently mentioned but understudied cause of political action. This article provides the first direct test of the hypothesis that casting a ballot in one election increases one's propensity to go to the polls in the future. A field experiment involving 25,200 registered voters was conducted prior to the November general election of 1998. Subjects were randomly assigned to treatment conditions in which they were urged to vote through direct mail or face-to-face canvassing. Compared to a control group that received no contact, the treatment groups were significantly more likely to vote in 1998. The treatment groups were also significantly more likely to vote in local elections held in November of 1999. After deriving a statistical estimator to isolate the effect of habit, we find that, ceteris paribus, voting in one election substantially increases the likelihood of voting in the future. Indeed, the influence of past voting exceeds the effects of age and education reported in previous studies.  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