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   20041篇
  免费   1279篇
各国政治   623篇
工人农民   1439篇
世界政治   1020篇
外交国际关系   596篇
法律   13776篇
中国共产党   1篇
中国政治   93篇
政治理论   3699篇
综合类   73篇
  2020年   348篇
  2019年   362篇
  2018年   1651篇
  2017年   1644篇
  2016年   1487篇
  2015年   496篇
  2014年   450篇
  2013年   1229篇
  2012年   456篇
  2011年   1257篇
  2010年   1502篇
  2009年   1063篇
  2008年   1054篇
  2007年   975篇
  2006年   361篇
  2005年   306篇
  2004年   400篇
  2003年   372篇
  2002年   236篇
  2001年   442篇
  2000年   355篇
  1999年   298篇
  1998年   155篇
  1997年   141篇
  1996年   123篇
  1995年   161篇
  1994年   167篇
  1993年   118篇
  1992年   220篇
  1991年   236篇
  1990年   219篇
  1989年   230篇
  1988年   209篇
  1987年   179篇
  1986年   211篇
  1985年   226篇
  1984年   229篇
  1983年   191篇
  1982年   153篇
  1981年   131篇
  1980年   129篇
  1979年   156篇
  1978年   100篇
  1977年   88篇
  1976年   69篇
  1975年   71篇
  1974年   77篇
  1973年   64篇
  1972年   55篇
  1971年   56篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
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   
202.
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   
203.
204.
Thompson D 《Time》1993,142(10):32-33
  相似文献   
205.
Hamstrung by biases and limited facts, doctors routinely deliver shoddy care to old people. This guide shows how to reject that medical mindset and stay healthy longer.  相似文献   
206.
207.
Small business crime has been largely ignored in American criminology; studies of nontraditional crime have focused mainly on corporate crime or on the misdeeds of employees pursuing personal gain. This paper calls for criminologists to redirect their efforts toward the systematic study of small business crime. In particular, it advocates in-depth qualitative studies that explore small business culture and opportunity structures, and that examine the networks of collusion that subvert the legitimate economy. The paper concludes with illustrations from an own story currently being shared with the author by a small businessman who participated for five years in an urban crime network that infiltrated the redistributive economy.  相似文献   
208.
Beck M  Hager M  Rogers P  Miller S  Rosenberg D  Snow K 《Newsweek》1993,121(14):28-33
With Bill Clinton's new reforms only a month away, the health-care system is on the operating table--and the doctors are under the knife. Americans have a love-hate relationship with physicians: they like the care that doctors provide but hold them to blame for the nation's health-care mess. NEWSWEEK looks at how the culture of medicine may change, assesses doctors' fears--and examines the brave new world of HMOs.  相似文献   
209.
210.
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