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   10511篇
  免费   307篇
各国政治   559篇
工人农民   314篇
世界政治   834篇
外交国际关系   467篇
法律   6120篇
中国共产党   1篇
中国政治   69篇
政治理论   2378篇
综合类   76篇
  2021年   66篇
  2020年   152篇
  2019年   171篇
  2018年   229篇
  2017年   275篇
  2016年   280篇
  2015年   185篇
  2014年   248篇
  2013年   1228篇
  2012年   256篇
  2011年   285篇
  2010年   243篇
  2009年   276篇
  2008年   335篇
  2007年   348篇
  2006年   323篇
  2005年   285篇
  2004年   290篇
  2003年   286篇
  2002年   256篇
  2001年   384篇
  2000年   354篇
  1999年   288篇
  1998年   145篇
  1997年   123篇
  1996年   121篇
  1995年   125篇
  1994年   123篇
  1993年   106篇
  1992年   170篇
  1991年   201篇
  1990年   162篇
  1989年   194篇
  1988年   166篇
  1987年   183篇
  1986年   184篇
  1985年   167篇
  1984年   142篇
  1983年   169篇
  1982年   123篇
  1981年   112篇
  1980年   96篇
  1979年   116篇
  1978年   96篇
  1977年   80篇
  1976年   73篇
  1975年   53篇
  1974年   77篇
  1973年   67篇
  1971年   55篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Social scientists have theorized about the cycle of domestic violence in family abuse. Little research has addressed dating violence as a consequence to the experience of domestic violence by children. This article deals with the self-reported experience of dating violence by high school students from abusive and nonabusive households. A survey was conducted of 1,353 students in a rural area of North Dakota. Results indicated that students from abusive households showed significantly higher incidence of dating violence than those from homes where no abuse was evident. However, less than one in five of the students from abusive home reported dating violence, providing little support for the cycle of violence hypothesis. Students from abusive homes viewed violence as negatively as students from nonabusive homes. Thus, while there are significant differences between the two groups, there are also important similarities. Although there is apparently a greater risk of dating violence among students who have experienced violence at home, these data do not support the idea of an inescapable pattern of violence among adolescents who have experienced violence themselves.  相似文献   
82.
This paper describes a collaborative exercise intended to demonstrate whether uniformity of DNA profile results could be achieved between different European laboratories. It was shown that this goal can be obtained provided that a common protocol is followed (specifically the use of a common electrophoretic buffer as being the most important parameter). Generally, lower molecular weight loci (with lower molecular weight fragments) such as YNH24 perform better than higher molecular weight loci such as MS43a. The results of the exercise are discussed in relation to the objectives of the European DNA profiling group (EDNAP).  相似文献   
83.
The authors examine the characteristics of threatening and otherwise inappropriate communications sent to members of the U.S. Congress by a sample of 86 subjects, 20 of whom threatened assassination. We quote excerpts from these letters and provide quantitative data on such variables as the volume, duration, form, and appearance of such communications; the enclosures; the subjects' perceived relationships to the recipients; the thematic content of the communications; and the messages and threats communicated. Comparisons between 43 subjects who pursued encounters with members of Congress and 43 who did not revealed 17 factors associated with such pursuit. In this population, threateners were significantly less likely to pursue an encounter than inappropriate letter writers who did not threaten, regardless of the type of threat or the harm threatened. Inappropriate letters to members of Congress are compared with those directed to Hollywood celebrities. Mentally disordered persons writing to public figures often mention and sometimes threaten public figures other than those to whom the letters are addressed, which raises important issues regarding notification of endangered third parties and the sharing of information among protective agencies.  相似文献   
84.
85.
Sixteen major evaluations of programs to prevent school bullying, conducted in 11 different countries, are reviewed in detail. Of these 16 evaluations, 8 produced desirable results, 2 produced mixed results, 4 produced small or negligible effects, and 2 produced undesirable results. These varying findings may reflect variations in programs, in implementation, in assessment methods, or in evaluation designs. It is concluded that high-quality evaluations are needed in the future, with randomized designs, theoretically grounded interventions, multiple measures of bullying, and attempts to disentangle the effectiveness of different program components.  相似文献   
86.
The Hunter family of Rhode Island produced two important American diplomatists of the nineteenth century. The elder William Hunter served for nine years as the American envoy to Brazil, where he exerted positive influence over the young emperor, Dom Pedro II. The younger William Hunter entered the Department of State in 1829 and spent fifty-seven years there under twenty-one Secretaries of State. For decades the department's third-ranking officer, he became its “mentor and authority.” The overlapping careers of Hunter and his two successors helped guide American diplomacy until 1937.  相似文献   
87.
88.
This article offers an intellectual genealogy of how the concept of human rights has entered the development discourse—from the formulation of a ‘right to development’ to the rhetorical incorporation of rights within prevailing discourse, to the articulation of a ‘rights-based approach’ to development. It concludes with some propositions about the important role that a focus on rights might play in the practice of international development.  相似文献   
89.
90.
A 6-month-old girl died suddenly without any previous symptoms of heart failure. Autopsy examination showed cardiomegaly (97 g) with a severely fibrotized myocardium. The left coronary artery was originating from the pulmonary artery. Histologically, the myocardium showed myocardial infarcts of different ages, as well as grossly thickened arterial branches due to increased flow in left-right shunt. We suggest that rare anomalies of the coronary arteries should be considered in the autopsies of suspected sudden infant death syndrome cases.  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