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   803篇
  免费   20篇
各国政治   20篇
工人农民   86篇
世界政治   65篇
外交国际关系   27篇
法律   380篇
中国政治   16篇
政治理论   212篇
综合类   17篇
  2022年   5篇
  2021年   2篇
  2020年   11篇
  2019年   11篇
  2018年   17篇
  2017年   13篇
  2016年   25篇
  2015年   17篇
  2014年   19篇
  2013年   105篇
  2012年   33篇
  2011年   25篇
  2010年   24篇
  2009年   11篇
  2008年   32篇
  2007年   35篇
  2006年   37篇
  2005年   42篇
  2004年   35篇
  2003年   29篇
  2002年   31篇
  2001年   16篇
  2000年   17篇
  1999年   9篇
  1998年   12篇
  1997年   6篇
  1996年   5篇
  1995年   10篇
  1994年   11篇
  1993年   10篇
  1992年   12篇
  1991年   15篇
  1990年   13篇
  1989年   9篇
  1988年   20篇
  1987年   12篇
  1986年   12篇
  1985年   8篇
  1984年   5篇
  1983年   4篇
  1982年   7篇
  1981年   5篇
  1980年   7篇
  1979年   7篇
  1978年   6篇
  1977年   4篇
  1976年   4篇
  1975年   6篇
  1974年   3篇
  1973年   2篇
排序方式: 共有823条查询结果,搜索用时 31 毫秒
811.
This study examined children's capabilities in an eyewitness task. Subjects aged five to twenty-two years viewed a confederate interacting with the experimenter and later were asked to tell what had happened, to answer objective questions (including a leading question), and to identify the confederate from 6 photos. The results indicated that although young children were unable to freely narrate what they had observed as thoroughly as adults, they were as accurate as adults in answering objective questions and in identifying the confederate from 6 photos. Additionally, there were no age differences in susceptibility to leading questions.  相似文献   
812.
Kantrowitz B 《Newsweek》2002,140(3):38-45, 47
  相似文献   
813.
814.
Theoretical and empirical work on collaboration has proliferated in the last decade. The authors’ 2006 article on designing and implementing cross‐sector collaborations was a part of, and helped stimulate, this growth. This article reviews the authors’ and others’ important theoretical frameworks from the last decade, along with key empirical results. Research indicates how complicated and challenging collaboration can be, even though it may be needed now more than ever. The article concludes with a summary of areas in which scholarship offers reasonably settled conclusions and an extensive list of recommendations for future research. The authors favor research that takes a dynamic, multilevel systems view and makes use of both quantitative and qualitative methods, especially using longitudinal comparative case studies.  相似文献   
815.
This study examines the use of the Massachusetts Youth Screening Instrument-Second Version (MAYSI-2) for mental health needs among 1643 youngsters in residential welfare/justice institutions in Europe and the USA, identifying gender differences across countries and settings. Overall, the MAYSI-2 appeared to be a reliable instrument among these youngsters, with only some scales falling (slightly) below the threshold of acceptable internal consistency. Girls (vs. boys) in Belgian/USA justice institutions and Swiss mixed welfare/justice institutions displayed higher scores for the angry–irritable, depressed–anxious, somatic complaints, suicide ideation scales. Also, detained girls from Belgium and Switzerland reported higher scores for traumatic experiences. No gender differences were revealed among adolescents in German welfare institutions. Our findings suggest that the MAYSI-2 may serve as a useful mental health screening instrument among youngsters in welfare/justice institutions and that girls in justice institutions and mixed welfare/justice institutions form a particularly vulnerable population with regard to mental health problems.  相似文献   
816.
817.
818.
The unusual appearance of crystalline fat structures was observed during the postmortem examination of a motor vehicle accident victim. The crystal structures were characterized using Fourier transform infrared spectroscopy and x-ray diffractometry. The structures were found to be made of triacylglycerols, a dominant lipid structure found in human adipose tissue, capable of forming various polymorphic structures. The morphology of the crystalline material was found using both techniques to be predominantly the beta' form of triacylglycerols. The accelerated growth of such triacylglycerol morphology has been observed as a result of shear stresses in other studies involving edible fats. As a result of the findings of this study, it is proposed that increased shear forces may be responsible for the formation of the unusual fat structure found in the victim. An understanding of the effect of forces on the structure of body fat in high-impact collisions can potentially assist in verifying a high-velocity impact.  相似文献   
819.
This study evaluated the compatibility of the most common enhancement methods and lifting techniques with DNA profiling. Emphasis is placed on modern lifting techniques (i.e., gelatin lifters and Isomark?) and historical fingerprint lifts for which limited research has been previously conducted. A total of 180 fingerprints were deposited on a glass surface, enhanced, lifted, and processed for DNA typing. DNA could be extracted and profiled for all the powders and lifts tested and from both groomed fingerprints and natural prints with no significant difference in the percentage of profile recovered. DNA profiles could also be obtained from historical fingerprint lifts (79.2% of 72 lifts) with one or more alleles detected. These results demonstrate the compatibility between different powder/lift combinations and DNA profiling therefore augmenting the evidential value of fingerprints in forensic casework.  相似文献   
820.
It is argued that past approaches to the research of housing policy and housing organizations are now inadequate and unable to provide a clear explanation of modernization and change. The modernization of social housing is associated with changing core organizational competencies and the movement towards a variety of partnership approaches. In response we develop a tripartite theoretical framework based around new institutional economics, strategic management and institutional theory. An exploratory review of the evidence at a sectoral level (examining social housing as a field, regulation and the profession) and the organizational level (focusing upon changing organization behaviour) is used to illustrate the legitimacy of this approach. In conclusion a research agenda is outlined.  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