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   2796篇
  免费   109篇
各国政治   136篇
工人农民   56篇
世界政治   88篇
外交国际关系   502篇
法律   1285篇
中国共产党   43篇
中国政治   192篇
政治理论   252篇
综合类   351篇
  2024年   4篇
  2023年   44篇
  2022年   41篇
  2021年   42篇
  2020年   94篇
  2019年   115篇
  2018年   108篇
  2017年   124篇
  2016年   100篇
  2015年   81篇
  2014年   91篇
  2013年   262篇
  2012年   164篇
  2011年   137篇
  2010年   83篇
  2009年   126篇
  2008年   164篇
  2007年   215篇
  2006年   179篇
  2005年   141篇
  2004年   140篇
  2003年   96篇
  2002年   86篇
  2001年   67篇
  2000年   55篇
  1999年   29篇
  1998年   17篇
  1997年   8篇
  1996年   10篇
  1995年   8篇
  1994年   11篇
  1993年   9篇
  1992年   8篇
  1991年   13篇
  1990年   6篇
  1989年   9篇
  1988年   6篇
  1987年   2篇
  1986年   7篇
  1985年   1篇
  1984年   1篇
  1979年   1篇
排序方式: 共有2905条查询结果,搜索用时 15 毫秒
901.
新冠肺炎疫情以湖北武汉为中心,迅速向全国蔓延,造成了严重的社会影响。在党的领导下,疫情防控阻击战目前已获得一定成果。新冠肺炎疫情的爆发不仅再次揭露了公共危机的特点,还揭示了我国公共危机管理中存在的问题:危机意识较薄弱、法制体系不完备、信息管理不完善和社会参与管理不足等。对此,应及时采取措施:政府层面做好大局建设,媒体层面提供信息支持,社会层面贡献优势力量。  相似文献   
902.
Mandibular length, mandibular angle, and maximum ramus height measurements used during forensic evaluation of skeletal remains require use of a mandibulometer. This study presents a new method of taking these measurements from images, so that practitioners without access to an expensive mandibulometer or those working with 3D models (e.g., CT scans) can collect and utilize these measurements. Ten trials performed on a sample of 45 mandibles were used to compare measurements collected from photographs and images extracted from 3D surface scans to those collected with a mandibulometer, including intra‐ and inter‐observer analyses. All technical error of measurement (TEM) values were less than 2 mm regardless of observer, trial, or method. Relative TEM values were less than 2% for all except mandibular length (2.10%) and ramus height (2.32%) for the right versus left photographs. Results are comparable with mandibulometer error rates, indicating that the proposed method is accurate and reliable.  相似文献   
903.
ABSTRACT

In this article, Forchtner investigates the construction of an ‘ideal’, extreme-right, ecologically sensitive subject. A concern for the natural environment is in no way new to the extreme right, and has long been part of its ideological make-up. In particular, claims that the laws of nature are applicable to the social world and that a community is embedded in an ecosystem have long been features of a right-wing ecological imaginary. Through an analysis of all the articles on a paradigmatic ecological issue, biodiversity, published in Germany’s exemplary extreme-right magazine preoccupied with ecology, Umwelt & Aktiv (Environment & Active), this cultural imaginary is reconstructed. Included in it as key themes are human responsibility for environmental degradation, the ecological value of flora and fauna, and criticism of modernity’s levelling tendencies (both biologically and culturally). Taking responsibility for the community’s Heimat (homeland) is, consequently, a crucial element for this subject: a subject who aims for purity, order and the stability of ecosystems.  相似文献   
904.
ABSTRACT

This article presents an analytical framework that guides the contributions to this special issue and, in general terms, aims at enabling a systematic investigation of processes of negotiation in the international promotion of democracy. It first briefly introduces the rationale for studying democracy promotion negotiation, offers a definition, and locates the general approach within the academic literature, bringing together different strands of research, namely studies of negotiation in international relations as well as research on democratization and democracy promotion. The larger part of the article then discusses key concepts, analytical distinctions and theoretical propositions along the lines of the three research questions that are identified in the introduction to this special issue. More specifically, the article (1) offers a typology that facilitates a systematic empirical analysis of the issues that are discussed in democracy promotion negotiations; (2) takes initial steps towards a causal theory of democracy promotion negotiation by identifying and discussing a set of parameters that can be expected to shape such negotiations; and (3) introduces key distinctions and dimensions that help guide empirical research on the output and outcome of negotiations in democracy promotion.  相似文献   
905.
目的死亡时间的推测是法医病理学研究的重点和难点。皮肤具有一定生物力学特性,是机体死后分解破坏发生较迟的部分。本研究观察不同环境条件下死后大鼠皮肤生物力学特性的改变,探索其与死亡时间的关系。方法系统测试雌性SD大鼠在不同环境条件下(A组较高环境温度,B组较低环境温度)的死后皮肤生物力学特性。结果 A组大鼠皮肤死后张应力、延伸率在死后1d内先降低后升高,1d~6d逐渐降低,6d~7d略呈上升趋势;B组大鼠皮肤死后张应力在死后2d内先降低后升高,2d~16d逐渐降低,16d~20d略上升。结论 A组的张应力、延伸率和B组的张应力、应变能密度均表现出与死亡时间较好的相关性,是较好的推测死亡时间的生物力学参数。  相似文献   
906.
This article discusses the trial of visual research methods in a socio-economic research and development project with women subsistence farmers and their families in two regions of Papua New Guinea (PNG). It reports on the benefits and challenges of three visual research methods (drawing, participatory photography, and picture elicitation) to explore the agricultural practice of women subsistence farmers and their families. The paper discusses the potential of these methods for enhancing community engagement, reducing the power imbalance between researchers and participants, and promoting dialogue and reflection to better understand the needs and practices of subsistence farmers.  相似文献   
907.
This article presents experiences with collaborative and on-farm research based on the implementation of a four-year Programme for Agricultural and Natural Resources Transformation for Improved Livelihoods (PANTIL) at Sokoine University of Agriculture (SUA) in Morogoro, Tanzania. It outlines the basic elements in the implementation of a programme aimed to be demand-based, and discusses the challenges encountered in combining collaborative research with the empowerment of farmers. Finally, the article draws out some lessons with implications for the future organisation of collaborative and on-farm agricultural research.  相似文献   
908.
Local knowledge has continued to gain popularity among development practitioners in the last four decades. However, the future of local knowledge seems hazy to some academics and researchers, perhaps due to the methodological challenges in operationalising local knowledge in development research. Rather than appropriate its full potential for sustainable (global) progress, renditions on the relevance of local knowledge in development research agenda have largely become rhetoric. Nonetheless, this viewpoint outlines 20 pertinent reasons in support of the relevance of local knowledge and why it has a future in development theory and practice.  相似文献   
909.
冰毒为纯白或淡黄色结晶体,为利益所驱,很多制贩毒者利用其它外观相似的晶体充当替代品或者掺杂剂,在常规检测时,用气/质联用仪无法检验其成分。本文利用扫描电镜/能谱仪和X-射线衍射仪对外观酷似"冰毒"的晶状物成分进行检测,先利用扫描电镜/能谱仪测定未知物主要元素,再利用X-射线衍射仪测定其晶体结构和成分。两者有效结合成功地鉴别假"冰毒"物质的成分。  相似文献   
910.
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