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   10544篇
  免费   584篇
各国政治   428篇
工人农民   368篇
世界政治   827篇
外交国际关系   302篇
法律   7121篇
中国共产党   1篇
中国政治   57篇
政治理论   1980篇
综合类   44篇
  2021年   60篇
  2020年   195篇
  2019年   235篇
  2018年   237篇
  2017年   294篇
  2016年   299篇
  2015年   248篇
  2014年   274篇
  2013年   998篇
  2012年   239篇
  2011年   309篇
  2010年   290篇
  2009年   303篇
  2008年   294篇
  2007年   265篇
  2006年   280篇
  2005年   251篇
  2004年   252篇
  2003年   236篇
  2002年   246篇
  2001年   466篇
  2000年   421篇
  1999年   293篇
  1998年   181篇
  1997年   147篇
  1996年   123篇
  1995年   117篇
  1994年   144篇
  1993年   132篇
  1992年   196篇
  1991年   217篇
  1990年   204篇
  1989年   214篇
  1988年   205篇
  1987年   190篇
  1986年   232篇
  1985年   206篇
  1984年   160篇
  1983年   170篇
  1982年   112篇
  1981年   120篇
  1980年   85篇
  1979年   131篇
  1978年   74篇
  1977年   73篇
  1976年   69篇
  1974年   74篇
  1973年   66篇
  1972年   66篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Coronary artery vasculitis is a well-recognized complication of polyarteritis nodosa and is occasionally seen in other forms of systemic vasculitis. However, involvement of the major epicardial coronary arteries leading to myocardial infarction and death is uncommon. Isolated coronary arteritis is even more rare. We report three cases of sudden death due to myocardial ischemia associated with arteritis of the major coronary arteries. All three decedents were previously healthy young to middle-aged men who had died suddenly after complaints of chest pain and shortness of breath. The autopsy findings and differential diagnoses are presented. Such cases are of particular interest to the medical examiner because of the sudden, unexpected nature of the deaths. An approach to the correct diagnosis is discussed.  相似文献   
992.
993.
994.
Indian Peafowl (Pavo cristatus) tail covert feathers were studied to investigate the difference between shed and plucked feathers in the context of wildlife offence cases involving the killing of the Indian national bird for the purpose of plucking feathers. Plucked feathers were distinguished from shed feathers by examining their roots under low magnification of a stereoscopic microscope. A chemical test to show the presence of blood on the roots of plucked feathers was used to corroborate the plucked origin of feathers.  相似文献   
995.
996.
Hypothalamic and hippocampal lipid composition in sudden death from coronary heart disease is studied. Thin-layer chromatography was the main method of biochemical analysis. Disorders in the lipid component of hippocampal cytostructures involved mainly the cholesterol fractions. Metabolic disorders in the hypothalamus involved the phospholipid metabolism. The above-mentioned biochemical changes were paralleled by ultrastructural abnormalities. Analysis of the data demonstrates a probable metabolic basis of a central mechanism of sudden cardiac death.  相似文献   
997.
998.
Many political essayists and judges writing in the early republic sought to circumscribe actions deemed oppressive and otherwise interfering with civil liberty. Associations seeking to advance a set of narrow interests at the expense of the public posed a threat to civil liberty. The way that threat was interpreted in the specific case of labor associations is the subject of this article. It was not the economic power of such entities that gave rise to indictments. Rather the political significance of "private confederacies" acting as an "imperium in imperio" was cited as the key threat to the new political order. Thus, Judge Levy in granting legitimacy to the American labor conspiracy laws did not cite common law precedent but his concern that "a new legislature consisting of journeymen shoemakers" would usurp the legitimate power "of our state legislatures."  相似文献   
999.
1000.
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