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   16864篇
  免费   1335篇
各国政治   640篇
工人农民   600篇
世界政治   1287篇
外交国际关系   489篇
法律   12117篇
中国共产党   1篇
中国政治   131篇
政治理论   2845篇
综合类   89篇
  2020年   393篇
  2019年   431篇
  2018年   502篇
  2017年   550篇
  2016年   563篇
  2015年   485篇
  2014年   525篇
  2013年   1721篇
  2012年   392篇
  2011年   498篇
  2010年   634篇
  2009年   608篇
  2008年   434篇
  2007年   397篇
  2006年   481篇
  2005年   356篇
  2004年   373篇
  2003年   341篇
  2002年   302篇
  2001年   701篇
  2000年   591篇
  1999年   463篇
  1998年   218篇
  1997年   200篇
  1996年   154篇
  1995年   180篇
  1994年   186篇
  1993年   149篇
  1992年   321篇
  1991年   355篇
  1990年   338篇
  1989年   343篇
  1988年   315篇
  1987年   285篇
  1986年   302篇
  1985年   312篇
  1984年   307篇
  1983年   265篇
  1982年   200篇
  1981年   198篇
  1980年   160篇
  1979年   217篇
  1978年   134篇
  1977年   104篇
  1976年   92篇
  1975年   107篇
  1974年   125篇
  1973年   113篇
  1972年   92篇
  1971年   90篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
211.
212.
213.
214.
215.
216.
Recently a federal court in Georgia ruled that several physicians and several state officials could be sued for state-authorized treatment of a minor over his father's objection. State authorization protects providers only if it is properly obtained and the authorizing official has the power to grant the authorization in the existing circumstances.  相似文献   
217.
218.
People die daily in the hospital. Mostly, they die because their illnesses were no longer treatable (natural death). Unfortunately, some people die an unnatural death, in particular, as the result of euthanasia. In contrast to the situation in most countries, in the Netherlands euthanasia is accepted by the courts under strict conditions. It can be very difficult for the legal authorities to establish whether a person has died from natural causes or from suicide, euthanasia, or murder. In addition to the pathologist and the lawyer, the toxicologist also has a number of problems in showing whether euthanasia has been carried out. These can consist of the following analytical problems: (a) interactions--the patients involved have frequently been receiving a large number of toxic and nontoxic drugs simultaneously; (b) identification--not all drugs administered are included in general screening procedures; (c) metabolites--a large number of metabolites may have accumulated toward the end of a long therapeutic regimen; and (d) determination--determination of quaternary muscle relaxants and their various metabolites, as well as other drugs, can be problematic. There are also toxicokinetic problems; because of poor kidney and liver function, low serum albumen, general malaise, and interactions between these factors and other drugs, the kinetics of a given drug can differ from normal. This makes it all the more difficult to determine whether the patient died from an accumulation of medication or from a so-called "euthanetic" drug mixture.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
219.
220.
This paper examines the process by which R&D results funded by the Office of Conservation and Renewable Energy (CE) of the US Department of Energy (DOE) have generated commercial applications. It looks at examples of technology-transfer procedures and activitees across three of CE's component offices that correspond to the major energy end-use sectors: transportation, buildings, and industry. On the surface, the conservation programs would appear to have little strategic consistency and, therefore, lack the clear leadership many seek in a technology-transfer program. However, as an alternative to strategic consistency, one may tailor the technology-transfer approach of each program to its unique circumstances. This paper presents case studies of such tailoring, in which the diversity of approaches mirrors the complexity of the energy end-use markets and the private-public interests that must be negotiated to successfully commercialize energy-saving innovations. The paper discusses the lessons learned about the conditions requiring adaptive design and the structures and practices that have been proven effective.  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