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   860篇
  免费   79篇
各国政治   66篇
工人农民   40篇
世界政治   73篇
外交国际关系   53篇
法律   458篇
中国政治   5篇
政治理论   232篇
综合类   12篇
  2021年   5篇
  2020年   14篇
  2019年   14篇
  2018年   30篇
  2017年   35篇
  2016年   37篇
  2015年   21篇
  2014年   22篇
  2013年   136篇
  2012年   36篇
  2011年   40篇
  2010年   25篇
  2009年   22篇
  2008年   31篇
  2007年   44篇
  2006年   24篇
  2005年   19篇
  2004年   22篇
  2003年   24篇
  2002年   26篇
  2001年   18篇
  2000年   9篇
  1999年   7篇
  1998年   10篇
  1997年   13篇
  1996年   12篇
  1995年   19篇
  1994年   15篇
  1993年   16篇
  1992年   11篇
  1991年   12篇
  1990年   6篇
  1989年   12篇
  1988年   15篇
  1987年   13篇
  1986年   14篇
  1985年   13篇
  1984年   5篇
  1983年   8篇
  1982年   6篇
  1981年   8篇
  1980年   8篇
  1979年   8篇
  1978年   9篇
  1977年   4篇
  1976年   6篇
  1975年   5篇
  1973年   6篇
  1972年   5篇
  1969年   4篇
排序方式: 共有939条查询结果,搜索用时 15 毫秒
201.
Roger Sibeon 《政治学》1999,19(3):139-144
It is appropriate that social scientists should develop explicit conceptualisations of agency, structure and social chance, these being three major dimensions of social and political life. The agency–structure debate, which refers to theoretical and ontological issues that tend not to be explicitly discussed by political scientists, is an important interdisciplinary starting point for conceptual and empirical work involving collaboration between political scientists and sociologists. Following a theoretical review of agency, structure and chance, it is argued that empirical research concerned with the study of politics and policy – indeed, social scientific research on any topic – should employ an ontology and methodology that focuses on the dynamics of interaction between agency, structure and social chance.  相似文献   
202.
203.
204.
205.
206.
207.
Retrospective review of hanging suicides in individuals aged ≤ 17 years was undertaken at Forensic Science South Australia, Australia, over two 5-year periods: 1995-1999 and 2005-2009. Seven cases of hanging suicides were identified from 1995 to 1999, with a further 14 cases from 2005 to 2009, an increase of 100% (p < 0.001). Hanging accounted for 33.3% of all suicides in this age group (7/21) from 1995 to 1999, compared with 93.3% of the total number of suicides (14/15) in the second 5-year period. In contrast, Australian national data from 1998 and 2008 showed a 30% decrease in hanging suicides in the young, from one case/100,000 population in 1998 to 0.7 in 2008. Cluster suicides occur in the young and are often initiated by direct communication. As it is possible that Internet-based social sites may facilitate this phenomenon, investigations should include an evaluation of the victim's Internet access given the potential risk of similar actions by peers.  相似文献   
208.
Systemic lupus erythematosus is an autoimmune connective tissue disorder that affects multiple organs. While the clinical manifestations may vary in intensity over time and be associated with chronic disease, occasional cases occur where sudden and unexpected death has occurred. Cardiovascular disease is common, with accelerated atherosclerosis, intravascular thrombosis associated with antiphospholipid syndrome, and hypertensive cardiomegaly. Vasculitis with superimposed thrombosis may result in critical reduction in blood to vital organs, such as the heart and brain with infarction. Mesenteric ischemia may be caused by vasculitis, thrombosis, and accelerated atherosclerosis and may result in lethal intestinal infarction. Other diverse causes of sudden death include myocarditis, epilepsy, pulmonary hypertension, pulmonary thromboembolism, and sepsis. The autopsy evaluation of such cases requires careful examination of all organs with extensive histological sampling to include blood vessels, and microbiological sampling for bacteria, viruses, and fungi.  相似文献   
209.
To determine whether vitreous humor sodium levels might be of use in evaluating deaths associated with immersion, samples of vitreous humor were prospectively evaluated at autopsy over a 4-year period from 2006 to 2009. There were 19 cases of saltwater immersion (age range 9-76 years; mean age 44 years; M:F, 2.8:1) and 16 freshwater immersions (age range 2-81 years; mean age 27 years; M:F, 2.2:1). In the group of saltwater drownings, vitreous humor sodium levels were elevated, ranging from 145 to 184 mM (mean = 160.2 ± 9.9 mM), and in the cases of freshwater drowning, the levels were reduced, ranging from 73 to 148 mM (mean = 129.8 ± 17 mM; p < 0.0001). Alterations in electrolyte levels may have been because of hemoconcentration or dilution from electrolyte fluxes in the lungs, or from passive diffusion during immersion. This study has demonstrated that vitreous sodium level is an easily performed test that may be a useful adjunct to the investigation of possible immersion deaths.  相似文献   
210.
Basal vacuolization of renal tubular epithelial cells (so-called Armanni-Ebstein phenomenon) has been attributed to hyperglycemia causing accumulation of cytoplasmic glycogen. Review of 34 autopsy cases with significant hyperglycemia (vitreous glucose ≥ 15 mmol/L/270 mg/dL) was undertaken to determine whether there was any significant association between the degree of hyperglycemia and the severity of this morphological change (graded as 0, 1+, 2+, and 3+). No association was demonstrated. Review of the subgroup of 14 cases with terminal hyperglycemia without ketoacidosis was then undertaken to assess the effect of hyperglycemia in isolation on renal tubular epithelial cells. Vitreous glucose levels in these 14 cases ranged from 17 to 49.7 mmol/L (306-894.6 mg/dL) with a mean of 26.25 mmol/L (472.5 mg/dL) and β-hydroxybutyrate levels ranged from 0.02 to 2.55 mmol/L (0.36-45.9 mg/dL) with a mean 0.79 mmol/L (14.22 mg/dL). Not one of the latter cases displayed basal vacuolization. No relationship between basal vacuolization of renal tubular epithelial cells at autopsy and terminal hyperglycemia could, therefore, be demonstrated.  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