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   203篇
  免费   14篇
各国政治   12篇
工人农民   6篇
世界政治   13篇
外交国际关系   11篇
法律   77篇
中国政治   1篇
政治理论   94篇
综合类   3篇
  2023年   1篇
  2022年   1篇
  2020年   6篇
  2019年   1篇
  2018年   3篇
  2017年   10篇
  2016年   12篇
  2015年   7篇
  2014年   3篇
  2013年   26篇
  2012年   7篇
  2010年   7篇
  2009年   5篇
  2008年   11篇
  2007年   10篇
  2006年   5篇
  2005年   7篇
  2004年   9篇
  2003年   3篇
  2002年   9篇
  2001年   9篇
  2000年   5篇
  1999年   8篇
  1998年   6篇
  1997年   7篇
  1996年   2篇
  1995年   1篇
  1994年   3篇
  1993年   4篇
  1992年   4篇
  1991年   2篇
  1990年   1篇
  1987年   2篇
  1986年   5篇
  1985年   1篇
  1983年   5篇
  1982年   3篇
  1981年   2篇
  1980年   1篇
  1978年   1篇
  1977年   2篇
排序方式: 共有217条查询结果,搜索用时 15 毫秒
11.
12.
13.
Intramyocardial small vessel abnormalities are not commonly recognized. The best known abnormality is fibromuscular dysplasia involving the sinoatrial or atrioventricular nodal arteries. Small vessel disease has been reported as an isolated cardiac anomaly in individuals with sudden death, and may also be associated with other cardiac conditions including hypertrophic cardiomyopathy and mitral valve prolapse. The nature of the association is unknown, and the mechanism causing sudden death is sometimes obscure. We describe pathological changes of the intramyocardial small vessels of three individuals with sudden death. Abnormalities involved small vessels at different levels. In all the cases, the abnormalities were thought to have caused or contributed to the individual's death. The possible mechanisms of this are discussed.  相似文献   
14.
15.
16.
But actually, he thought as he re–adjusted the Ministry of Plenty's figures, it was not even forgery. It was merely the substitution of one piece of nonsense for another. Most of the material that you were dealing with had no connexion with anything in the real world, not even the kind of connexion that is contained in a direct lie. Statistics were just as much a fantasy in their original version as in their rectified version.  相似文献   
17.
Medicaid, the health care program for the poor, has undergone significant changes in the last fifteen years. Many of those changes relate to the intergovernmental nature of the program. Medicaid is jointly operated, with the federal and state governments sharing program costs. Despite a set of program guidelines dictated by the federal government, states have traditionally had substantial latitude in Medicaid decisions. However, a series of developments in the 1980s led to increasing constraints on state Medicaid discretion, including federal mandates to expand Medicaid coverage. This article examines the inception and effectiveness of the Medicaid mandates from the perspective of interstate equity of health care services for poor families.  相似文献   
18.
19.
Thirty-two self-immolation deaths by fire, representing about 1% of suicides, occurred in the province of Ontario (population 9 million), Canada, from 1986 through 1988. The victims, mostly male (male/female ratio, 26:6), were between 21 and 71 years old (mean age, 38 years). Although the scene of self-immolation was usually familiar to the deceased, some chose remote locations. Eleven were found dead in motor vehicles. An accelerant, usually gasoline, was used in most cases. Many of these individuals had, at some time, indicated their intent to commit suicide, a few by self-immolation, but only about half had a diagnosed psychiatric illness. Most of the victims had a reason to kill themselves, but the factors that motivated them to chose self-immolation by fire were uncertain. Fourteen individuals died in hospitals from severe burn complications. The remainder were found dead at the scene. The postmortem findings of soot in the airway and elevated carbon monoxide in the blood of most of these victims [the carboxyhemoglobin (COHb) concentration was in one case less than 10%, in ten cases greater than or equal to 10 to 50%, and in seven cases greater than 50%] were helpful in determining that the individuals were not only alive at the time of the fire but also that a significant number died from smoke inhalation and carbon monoxide poisoning. The highest levels of carbon monoxide were observed in victims discovered in motor vehicles.  相似文献   
20.
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