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   286篇
  免费   14篇
各国政治   26篇
工人农民   13篇
世界政治   30篇
外交国际关系   11篇
法律   177篇
中国政治   4篇
政治理论   39篇
  2023年   4篇
  2022年   2篇
  2021年   3篇
  2020年   18篇
  2019年   11篇
  2018年   25篇
  2017年   8篇
  2016年   13篇
  2015年   12篇
  2014年   10篇
  2013年   32篇
  2012年   13篇
  2011年   15篇
  2010年   8篇
  2009年   12篇
  2008年   10篇
  2007年   8篇
  2006年   7篇
  2005年   4篇
  2004年   14篇
  2003年   12篇
  2002年   15篇
  2001年   6篇
  2000年   7篇
  1999年   2篇
  1998年   2篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1994年   4篇
  1992年   1篇
  1991年   4篇
  1990年   2篇
  1989年   2篇
  1988年   1篇
  1986年   1篇
  1984年   2篇
  1980年   1篇
  1972年   1篇
  1969年   1篇
  1964年   1篇
排序方式: 共有300条查询结果,搜索用时 31 毫秒
91.
92.
The decline in the incidence of sudden infant death syndrome (SIDS) and recent recommendations regarding the differentiation of SIDS and child abuse has generated speculation that some cases of infanticide were misdiagnosed as SIDS. The aims of this study were to determine the change in incidences and proportions of postneonatal deaths from all causes, SIDS, and infanticide in California over an 18-year interval encompassing years before and after the Back to Sleep campaign. Selected postneonatal mortality data from 1981 through 1998 obtained from the California Department of Health Services were analyzed and graphically displayed. The total postneonatal mortality and incidence of SIDS deaths per 100,000 live births decreased 45% and 66%, respectively, during the study interval; the incidence of infanticide remained low. The ratio of infanticide to SIDS increased from 4.3 per 100 in 1981 to 10.2 per 100 in 1998. Infanticide deaths, as a percentage of the total number of postneonatal deaths, increased slightly from the first to the second half of the study interval but never rose above 3.2%. It is concluded that this increased percentage is due to a decrease in SIDS deaths and not to an actual increase in infanticide deaths.  相似文献   
93.
The polymorphism of nine STR loci has been studied in a sample of 598 individuals from the population of Alagoas, Northeastern Brazil. Determination of the allele frequencies as well as of several commonly used statistics in forensic and paternity testing were defined. The most polymorphic loci were TH01 and D7S317. The exact test demonstrated that the nine loci analyzed in the population have no deviation from Hardy-Weinberg equilibrium (P > 0.05).  相似文献   
94.
Allele and haplotype frequencies of seven Y-chromosome STR loci, DYS 19, DYS388, DYS389I, DYS389II, DYS390, DYS391 and DYS392, were determined from 109 unrelated males in Rio de Janeiro, Brazil, sample population.  相似文献   
95.
Posttraumatic stress disorder has long been linked to violent behavior. However, the exact nature of that association remains poorly characterized due to the limitations of knowledge in the area of phenomenology, contextual factors, the biology, and the nature of the aggression involved in the disorder. A clear understanding of the genesis of violence in posttraumatic stress disorder can be helpful to those involved in assessing psychiatric-legal issues relevant to the disorder and in its therapeutic management. In this article, we review the potential psychological links between posttraumatic stress disorder secondary to combat exposure and violent behavior and suggest a tentative classification of the main psychological causes of violence in that syndrome.  相似文献   
96.
Side-payments are commonly used in international relations to alter the foreign policies of states. Despite their frequent usage, however, our understanding is very limited as to why certain side-payment negotiations succeed, while others fail. This article tries to remedy this shortcoming. It argues that social embeddedness between actors involved in the negotiations has a major bearing on bargaining outcomes. Under ideal circumstances, social relationships can be used to reduce information asymmetries and increase trust. But in the presence of fractured social networks, social ties can foster information bias and distrust, ultimately increasing the likelihood of bargaining failure. The US-Turkish bargaining failure over the Iraq intervention in 2003 is used to illustrate and test this theory.  相似文献   
97.
Previous research has established a relationship between income and food security. In this article, we examine the effect of food security on food purchases, specifically on five food‐at‐home groups. Using a set of Tobit models, and after controlling for a set of confounding factors, we show that food security perception leads to the purchase of fruit and vegetables, meats and eggs, and dairy products while decreasing the purchase of fat and carbohydrates. However, we cannot be certain of the actual nutritional effect.  相似文献   
98.
99.
This study presents two cases of lethal bentazone poisonings, their clinical presentation, the course of the disease and the autopsy findings. The first is a 50‐year‐old male who had sprayed corn with a solution of bentazone and was admitted to the hospital with sweating, fever, nausea, vomiting of aqueous and hemorrhagic content, and bloody, watery stools. He was treated according to the symptoms including extracorporeal hemodialysis, but eventually suffered from multiorgan failure (acute respiratory failure, acute liver failure, coagulopathy, acute renal failure, metabolic acidosis, and gastrointestinal bleeding) and died 11.35 h after admittance. The cause of death was probable bentazone intoxication. The second case, also a male, aged 49 who committed suicide by ingesting a bentazone solution. He was transferred to the hospital prostrated and cyanotic and died 14.15 h after admittance despite all efforts by the hospital staff. The cause of death was acute bentazone intoxication.  相似文献   
100.
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