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   306篇
  免费   15篇
各国政治   19篇
工人农民   12篇
世界政治   35篇
外交国际关系   27篇
法律   175篇
中国政治   4篇
政治理论   47篇
综合类   2篇
  2023年   3篇
  2022年   4篇
  2021年   6篇
  2020年   8篇
  2019年   8篇
  2018年   6篇
  2017年   12篇
  2016年   10篇
  2015年   12篇
  2014年   10篇
  2013年   49篇
  2012年   13篇
  2011年   15篇
  2010年   3篇
  2009年   9篇
  2008年   18篇
  2007年   24篇
  2006年   17篇
  2005年   15篇
  2004年   18篇
  2003年   12篇
  2002年   4篇
  2001年   7篇
  2000年   7篇
  1999年   2篇
  1998年   4篇
  1997年   5篇
  1996年   1篇
  1995年   2篇
  1994年   2篇
  1992年   1篇
  1990年   3篇
  1987年   1篇
  1986年   2篇
  1985年   1篇
  1984年   2篇
  1977年   2篇
  1975年   1篇
  1973年   1篇
  1968年   1篇
排序方式: 共有321条查询结果,搜索用时 437 毫秒
81.
The occurrence of complete decapitation as a consequence of car accident is an extremely rare event. This fatality is generally seen in pedestrians run over by trains and also in motorcyclists who impact against the tailboard of trucks. Moreover, complete transection of pedestrians and occupants of cars has been described in road accidents especially in case of vehicles traveling at a high speed. We present a case of decapitation with complete degloving injury of the neck in a patient involved in a traffic accident, and we briefly discuss the possible mechanisms producing this injury.  相似文献   
82.
Stress-induced cardiomyopathy (SICM) is characterized by transient systolic dysfunction of the apical and/or midventricular myocardial segments in the absence of obstructive coronary artery disease and is unique in that it can manifest itself after acute emotional stress. Excessive amounts of catecholamines released from sympathetic nerve endings as well as from the adrenal medulla under stressful conditions are considered to produce intracellular Ca(2+) overload and cardiac dysfunction through the β(1)-adrenoceptor signal transduction pathway. We describe the clinical and pathomorphological findings in two stress-induced cardiomyopathy fatal cases. Levels of catecholamines and their metabolites in urine samples were assessed too. Morphological patterns seen in SICM result from the complex interplay between sympathetic innervations, β-receptor density and function and catecholamine sensitivity.  相似文献   
83.
84.
Several ink dating methods based on solvents analysis using gas chromatography/mass spectrometry (GC/MS) were proposed in the last decades. These methods follow the drying of solvents from ballpoint pen inks on paper and seem very promising. However, several questions arose over the last few years among questioned documents examiners regarding the transparency and reproducibility of the proposed techniques. These questions should be carefully studied for accurate and ethical application of this methodology in casework. Inspired by a real investigation involving ink dating, the present paper discusses this particular issue throughout four main topics: aging processes, dating methods, validation procedures and data interpretation. This work presents a wide picture of the ink dating field, warns about potential shortcomings and also proposes some solutions to avoid reporting errors in court.  相似文献   
85.
This study examined the prevalence of mental health and substance abuse disorders and service utilization among a racially and ethnically diverse group of foster youth. Self-report data on symptoms and service receipt were used to identify whether groups of adolescents defined by their race and ethnicity were equally likely to receive services given the presence of a mental health or substance use disorder. Study findings showed that Caucasians are more likely to receive mental health services than African Americans. Race was not a significant predictor of accessing substance abuse services. Hispanic ethnicity was not a predictor of receipt of mental health or substance abuse treatment services. Implications for future research, practice, and policy are discussed.  相似文献   
86.
New Public Management (NPM) recently has been compared and contrasted with public governance (PG) to illustrate shifts in conceptions of public administrations and in reform agendas. The authors develop measures to capture the relevance of NPM and PG in textual discourse and investigate the extent to which they have entered the political debate. Content analysis of electoral programs for the 2005 Italian regional elections reveals that even in this legalistic country, considerable attention was paid to both NPM and PG issues. An important explanatory variable in preference for NPM or PG is party ideology, highlighting often‐ignored within‐country dynamics. Furthermore, the authors show how a methodological approach adapted from mainly political science and business research can be exploited in the field of public administration.  相似文献   
87.
88.
89.
The setting up of Universities in Spain is considered to be part of the fundamental right to establish private educational institutions. For a long time there have only existed Church Universities alongside Public Universities, and these have had their legal basis in Agreements between Spain and the Vatican. As of 1991 there has been an on-going process of setting up purely private Universities, to the point that there are now eleven besides the Church Universities. This article examines their legal framework from the point of view of their organisation, the system governing their teaching staff and their effective autonomy with regard to the Public Authorities. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
90.
A fatality due to ingestion of flurazepam is reported. Flurazepam is a benzodiazepine, a widely prescribed hypnotic drug for use in sleep disorders. There are only few documented reports of the disposition of flurazepam in deaths due to overdose. A 68-year-old woman was found deceased at home with no evidence of trauma or asphyxia. Toxicologic analyses were performed and drug levels measured by means of gas chromatography coupled to mass spectrometry. The flurazepam concentration in each specimen was as follows: heart blood 2.8 microg/mL, bile 323 microg/mL, and urine 172 microg/mL. Presence of flurazepam into gastric content was observed too. Based on the autopsy findings, patient history, and toxicologic results, the cause of death was determined to be acute intoxication of flurazepam and the manner, suicide.  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