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   1400篇
  免费   108篇
各国政治   132篇
工人农民   120篇
世界政治   151篇
外交国际关系   71篇
法律   795篇
中国政治   11篇
政治理论   221篇
综合类   7篇
  2023年   21篇
  2022年   8篇
  2021年   35篇
  2020年   42篇
  2019年   67篇
  2018年   87篇
  2017年   115篇
  2016年   71篇
  2015年   73篇
  2014年   78篇
  2013年   213篇
  2012年   73篇
  2011年   62篇
  2010年   30篇
  2009年   31篇
  2008年   54篇
  2007年   58篇
  2006年   54篇
  2005年   53篇
  2004年   47篇
  2003年   49篇
  2002年   43篇
  2001年   22篇
  2000年   20篇
  1999年   14篇
  1998年   9篇
  1997年   11篇
  1996年   2篇
  1995年   4篇
  1994年   5篇
  1993年   6篇
  1992年   6篇
  1991年   4篇
  1990年   3篇
  1989年   3篇
  1988年   4篇
  1987年   3篇
  1986年   4篇
  1984年   4篇
  1983年   6篇
  1982年   3篇
  1980年   1篇
  1978年   1篇
  1976年   2篇
  1972年   3篇
  1968年   1篇
  1967年   1篇
  1966年   1篇
  1964年   1篇
排序方式: 共有1508条查询结果,搜索用时 15 毫秒
291.
292.
Four experiments, one in each season, were carried out during 2004 in a rural area of Córdoba, central Argentina. Two pigs (Sus scrofa L.), weighing approximately 8 kg each, were used in each of the four experiments. The animals were killed by a sharp blow to the head and immediately placed in an appropriate arthropod trap. One pig was placed in the shade and the other under direct sunlight. This research was conducted to determine the seasonal structure and dynamics of arthropods that constitute the sarcosaprophagous community in a given area of the central region of Argentina. The decomposition process was divided into five stages: fresh, bloated, decay, advanced decay and dry. The duration of each stage varied in different seasons, showing that the temperature and humidity are the most important variables that influence this process. A total of 51,500 adults and 36,909 immature were collected. More than 80% of the specimens collected belong to Insecta, and within this, Diptera were the most abundant order. The flies were mainly represented by adults and immature of the following species: Chrysomya albiceps (Wiedemann) (Calliphoridae), Musca domestica Linnaeus (Muscidae) and Fannia femoralis (Stein) (Fanniidae). Coleoptera were mainly represented by adults and immature of the species Creophilus maxillosus (Linnaeus) (Staphylinidae) and Dermestes maculatus (Geer) (Dermestidae). More than 50% of hymenopteran fauna collected belong to Formicidae. The trophic levels associated with the decomposition of the remains included five categories: necrophagous, parasites and predators of the necrophagous species, omnivores, opportunists and adventives. During faunal succession a strong dominance of the necrophagous species of the family Calliphoridae and Muscidae was observed, mainly during the early stages of decay process in all seasons.  相似文献   
293.
Infections are considered to be an important cause of unexpected death in children. It has also been assumed that respiratory viruses are involved in the genesis of sudden infant death syndrome (SIDS). The Spanish National Institute of Toxicology and Forensic Sciences act as the forensic reference centre for Spain. We analyse the experience of this centre in the virological study of 64 cases of sudden children death where viral serology, virological cultures, herpesviruses polymerase chain reaction (PCR) and electron microscopy were performed. According to pathological findings, death could only be attributed to an adenovirus infection in one amygdalitis with upper airways stenosis and asphyxia. Human herpes virus 6 (HHV-6) was detected by PCR in one case with pathological findings characteristic of SIDS. Recent infection by respiratory syncytial virus (RSV), Epstein-Barr virus (EBV) and cytomegalovirus (CMV) were also detected. Meanwhile, 85.9% of the cases yielded negative viral results. Twenty-eight infants were finally categorised as SIDS. Pathological findings of infection were detected in 12 patients despite the negativity of viral analyses. Although viral infection is an uncommon cause of sudden children death, a complete microbiological investigation will help to solve the puzzle of SIDS. Definitive guidelines for microbiological analyses need to be updated whilst new pathogens are discovered or new techniques are implemented in order to clarify unsolved cases.  相似文献   
294.
ABSTRACT

In this article we argue that the impact of Brexit on the law schools in Northern Ireland is tied to the “unique circumstances” of legal education in this part of the world. Legal education in Northern Ireland is likely to develop to become even more distinctive than that in other parts of the UK. Although there are two distinct jurisdictions on the island, they are deeply entangled by shared history and geographical proximity that make cross-border practice a daily reality. These circumstances seem likely to drive the trajectory of the development of legal education in Northern Ireland. Indeed, EU law is likely to remain a component of the Northern Irish qualifying law degree. The potential for the development of law specific to Northern Ireland under backstop arrangements is another significant driver for the future orientation of legal education in this jurisdiction. Legal education in Northern Ireland is, therefore, likely to become noticeably more “European” than that in other parts of the UK.  相似文献   
295.
Problems of unity can affect an armed opposition group at many stages of its existence—during the war, in peace negotiations, and in its transition to political party. This article assesses how internal divisions affected the performance of the Farabundo Martí National Liberation Front (FMLN) in El Salvador. It finds that while the FMLN suffered significant internal divisions in the early years of the war, it remained remarkably unified from 1983 on. Significant divisions began to appear during the later war years but were not exacerbated until after the war's conclusion, when repeated fracturing occurred. The FMLN began to present itself as a programmatically coherent party only in 2005, and this ideological homogeneity allowed it to establish a series of partnerships with moderate, non‐revolutionary sectors of Salvadoran society and to achieve victory in the 2009 presidential elections.  相似文献   
296.
297.
298.
299.
Abstract

According to international relations scholars, an important change taking place in the post-Cold War context concerns the lethality of non-state armed groups (NSAGs). Underlying this observation is the conventional assumption that non-state violence is intrinsically illegitimate. This article shifts the analysis of violence away from the terrain of legitimacy, which tends to moralise the difference between state and non-state forces, and towards the terrain of work, where their violence features as part and not separate from a shared political economy. I propose the notion of violence work as a resourceful analytic into the dialectics of everyday violence and the complex processes of value production in social life. Against the background of the extreme cruelty attributed to transnational gangs in Central America, I argue that their violence work is expressive of prevailing modes of accumulating wealth in the region. Drawing on multi-sited fieldwork in Honduras, Guatemala, El Salvador and Mexico, I show how gang violence work animates a system of economic cooperation that engages a wide array of subjects who traverse state/non-state and legal/illegal divides.  相似文献   
300.
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