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   804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   381篇
中国政治   16篇
政治理论   212篇
综合类   17篇
  2022年   6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824条查询结果,搜索用时 15 毫秒
341.
The transit industry in the United States is preparing for growth as the world deals with climate change and it is applying various methods to measure and monitor its impact on the environment. Working with local, state, and federal governments, transit agencies have adapted many commonsense solutions. Now the American Public Transportation Association is putting together standards and best practices to encourage the industry and inform the public about the benefits of public transportation to the environment, helping our nation join the rest of the world. It is also developing and applying new transit strategies that will attract more riders and reduce greenhouse gas emissions. Portland, Oregon's Tri-Met, New York's Metropolitan Transportation Authority, and the Utah Transit Authority are leading the industry. Portland, Oregon's Tri-Met General Manager, who chairs the industry's Sustainability Committee for the American Public Transit Association has been leading by example with an Environmental Management System that addresses greenhouse gas, pollution, waste, inefficiency, and congestion. New York and Utah are recording greenhouse gases with the Climate Registry. Many agencies are developing new strategies that are attracting more riders and experiencing an intermodal shift to buses and trains. Meanwhile, developing countries are able to increase service and pay for it by selling carbon credits.  相似文献   
342.
Within the initial step of the forensic DNA analysis process, the DNA extraction efficiency and especially the removal of potential PCR inhibitors is crucial for subsequent steps, e.g. quantification by real-time PCR and amplification of short tandem repeats (STRs). The protocol of the PrepFiler™ Forensic DNA Extraction Kit was optimized for the application on a Tecan liquid handling workstation Freedom EVO® 150. This modified application of the PrepFiler™ technology was compared with respect to DNA yield, sensitivity and the ability to remove potential PCR inhibitors to an established routine method working on the same liquid handling workstation based on ChargeSwitch® Technology (CST) from Invitrogen.  相似文献   
343.
344.
This article traces the battle in the United States during the Obama administration, continuing into the Trump administration, to protect children's rights to food. It explores barriers to development of sound, science‐based food policies, including the refusal to recognize food as a human right, anti‐science denialism, hostility toward government regulation, and relative powerlessness of children. It points to the role of a “Big Food Pyramid” composed of powerful food industry and large scale distribution and marketing interests in blocking sound policies in prenatal and infant nutrition, school lunches, SNAP and WIC, the marketing to children of high fat and fructose‐laden products, and campaigns to increase youth fitness. While predicting a continuing assault at the federal level on children's rights to safe and healthy foods, the article highlights the positive role of consumer demand in shaping marketing, labeling and production of food and opportunities for leaders in the food industry and in government at local, municipal and state levels to continue the battle for sound food policies.  相似文献   
345.
346.
347.
Whilst any estimation of crime costs is a challenge even at a national level and in respect to crimes not particularly problematic from the definitional viewpoint, like volume crimes, the task is much harder when one has to deal with the harm caused by organised crime, especially from a comparative perspective. First, notwithstanding many international acts and studies, the term ‘organised crime’ is still one of those most debated and blurred in criminology. To complicate matters further, any cross-country assessment encounters such a wide variety of national differences (cultural, in the definition of offences, and in crime data collection systems) that the results are hardly comparable. Though extremely difficult, discussing the topic makes a great deal of sense today, and especially within the European Union, because there is strong demand for sound knowledge on the most harmful activities perpetrated by organised criminal groups and where these are localised. Considering the increasing importance attached to the issue, this article critically discusses existing attempts to measure organised crime harm from a comparative perspective, highlighting their strengths and weaknesses. It first reviews harm assessment models developed to date at the international level, and mainly consisting of surveys. It then presents a different approach to the subject, one more centered on official statistics and which has recently resulted in the development of a methodology in the context of a EU-funded study entitled IKOC (Improving Knowledge on Organised Crime to develop a common European approach).  相似文献   
348.
This article examines the ways in which the identity of a nineteenth-century American missionary college in Istanbul was constructed by key players in its development. Through analysis of published reports designed to create public perceptions about the institution, the article unearths deep divisions about the purpose of Constantinople College and tracks its changing identity following the political vicissitudes of the era. The article argues that college trustee Caroline Borden, president Mary Mills Patrick, and alumna Halidé Edib had their own motives for shaping and promoting an American Ottoman institution grounded in Protestant culture, American values, Ottoman cosmopolitanism, and a feminist international spirit.  相似文献   
349.
350.
ABSTRACT

The articles in this Special Issue are drawn from some of the contributions to a conference held at Sheffield Hallam University, UK, from 29 August to 1 September 2013 titled ‘Women's Histories: the local and the global’. The articles reflect on diverse aspects of the entangled histories of women across the world, mainly, but not exclusively, during the twentieth century. They explore the range of ways in which women's history, international history, transnational history and imperial and global histories are interwoven.  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