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   20146篇
  免费   555篇
各国政治   791篇
工人农民   743篇
世界政治   1557篇
外交国际关系   672篇
法律   12632篇
中国共产党   7篇
中国政治   107篇
政治理论   3967篇
综合类   225篇
  2020年   244篇
  2019年   282篇
  2018年   371篇
  2017年   425篇
  2016年   472篇
  2015年   315篇
  2014年   377篇
  2013年   1882篇
  2012年   485篇
  2011年   551篇
  2010年   420篇
  2009年   431篇
  2008年   546篇
  2007年   570篇
  2006年   539篇
  2005年   481篇
  2004年   505篇
  2003年   524篇
  2002年   480篇
  2001年   806篇
  2000年   726篇
  1999年   603篇
  1998年   305篇
  1997年   252篇
  1996年   217篇
  1995年   219篇
  1994年   259篇
  1993年   244篇
  1992年   389篇
  1991年   442篇
  1990年   401篇
  1989年   425篇
  1988年   402篇
  1987年   412篇
  1986年   402篇
  1985年   399篇
  1984年   340篇
  1983年   370篇
  1982年   273篇
  1981年   254篇
  1980年   189篇
  1979年   276篇
  1978年   193篇
  1977年   161篇
  1976年   154篇
  1975年   146篇
  1974年   171篇
  1973年   152篇
  1972年   144篇
  1971年   129篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
281.
282.
283.
284.
285.
286.
287.
The American health care system appears to suffer from higher costs and less access than the health care systems of other industrialized nations. This perception has set social scientists searching for "lessons from abroad." This paper places the dialogue about health system lessons within the context of American political culture. It sketches out some of the distinctive dynamics in the American policymaking process. Those dynamics help explain the problems we face, the programs we have pursued, and the alternatives we have foregone. The same political process which shaped past policies is likely to frame any lessons we try to import from abroad.  相似文献   
288.
The case of the death by arsenic poisoning of a 62-year-old white man is presented. One year prior to death, he developed intermittent bouts of severe gastroenteritis with vomiting and diarrhea, hyperpigmentation and keratosis of the skin, neutropenia, and Guillain-Barré-like neuropathy for which he was hospitalized several times. Urine test results 6 months prior to death indicating 36 mg/L arsenic were believed to be in error. At the patient's last admission, he appeared in the emergency room with severe gastroenteritis, hypotension, and dehydration. He died 3 days later. Antemortem as well as autopsy specimens revealed elevated arsenic concentrations. Arsenic micrograms/g analysis by neutron activation of hair pulled from the man's head revealed by centimeter segmental analysis proximal to distal: 226, 104, 28, 56, 41, 40, and 74. The wife of the decedent was charged with murder by arsenic poisoning of this, her fifth, husband. The defense alleged that the decedent had committed suicide. The judge awarded a directed verdict of "not guilty." Particulars of the medical, toxicological, and investigative findings are presented.  相似文献   
289.
290.
In the summer of 1984, police in Pinellas County, Florida, confiscated six identically colored imported Asian skulls (in a shipping case) from a private citizen. In May 1988, in nearby Hillsborough County, police confiscated a very similar skull from another private citizen, who allegedly had found it in an abandoned house. Aside from slight color differences between the six found in Pinellas County and the one found in Hillsborough County, the skulls are virtually identical in their osteological characteristics and condition and in the vital statistics derived from each. Each skull is as clean and dry as those typically sold by commercial scientific supply outlets in the United States. Each is edentulous (primarily premortem), between approximately 20 and 60 years of age at death, and morphologically Asian. Five of the seven are morphologically male, one is morphologically female, and one is a mosaic with respect to gender-related features. Police, medical examiners, coroners, and forensic anthropologists should be aware of such "souvenir" specimens, in the event that they encounter similar skulls. Discriminant function analyses for race and sex yield considerably conflicting results, which underscores the need for using extreme caution when interpreting forensic science estimates based on such techniques.  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