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   1406篇
  免费   107篇
各国政治   139篇
工人农民   88篇
世界政治   163篇
外交国际关系   76篇
法律   794篇
中国政治   5篇
政治理论   241篇
综合类   7篇
  2023年   21篇
  2022年   8篇
  2021年   31篇
  2020年   40篇
  2019年   52篇
  2018年   80篇
  2017年   108篇
  2016年   78篇
  2015年   69篇
  2014年   73篇
  2013年   220篇
  2012年   66篇
  2011年   54篇
  2010年   30篇
  2009年   27篇
  2008年   48篇
  2007年   56篇
  2006年   57篇
  2005年   45篇
  2004年   50篇
  2003年   54篇
  2002年   43篇
  2001年   31篇
  2000年   21篇
  1999年   12篇
  1998年   10篇
  1997年   6篇
  1996年   5篇
  1995年   7篇
  1994年   4篇
  1993年   5篇
  1992年   4篇
  1991年   6篇
  1990年   4篇
  1989年   5篇
  1988年   4篇
  1986年   4篇
  1985年   5篇
  1984年   5篇
  1982年   3篇
  1980年   6篇
  1979年   10篇
  1977年   4篇
  1976年   4篇
  1975年   4篇
  1974年   8篇
  1972年   3篇
  1970年   3篇
  1969年   2篇
  1968年   4篇
排序方式: 共有1513条查询结果,搜索用时 15 毫秒
161.
Lip prints are thought to have the ability to distinguish individuals and, hence, have a potential use in human identification purposes. However, questions remain regarding their utility for sex determination. This study aimed to classify lip prints for different individuals in a Portuguese population and to determine whether sex differences exist. Lip prints of 25 females and 25 males were obtained using dark-colored lipstick and cellophane tape. Lip prints were analyzed using a magnifying lens and classified according to the Suzuki and Tsuchihashi classification. A Type II pattern was found to be most common. A comparison of lip-print patterns between males and females showed results with a statistically significant difference: Type III pattern was most common in males, and a Type II pattern in females. This study corroborates the hypothesis that lip prints are able to distinguish individuals and may be useful in sex determination.  相似文献   
162.
In this paper we seek to contribute to a greater understanding of legal citizenship by exploring the gendered experiences of Latin‐American‐origin immigrants in the greater Phoenix metropolitan area as they go through the legalization process. To explore this gendered angle we rely on in‐depth interviews conducted from 1998 through 2008 with women and men from Guatemala, El Salvador, Honduras, and Mexico. The data reveal that although immigration policies and procedures are presumably gender neutral, they are in fact inflected with gendered meanings and enacted in gendered social structures. Gender ideologies permeate the processes to differentially affect the legalization, permanent legal residence, and citizenship processes of immigrant women and men. This article points to key gender inequalities in immigration law.  相似文献   
163.
The dissemination of public sector information is not carried out exclusively by public administration. A significant proportion of public sector information constitutes the raw material used by the content industry to offer goods and services and by citizens to provide richer information. In the European Union, Directive 2003/98/EC on the reuse of public sector information establishes a set of rules governing the reuse of public sector information. Although this rule is not intended to provide greater transparency, the re‐use of public sector information could have this effect. This article sets out the European policy on public sector information reuse and it looks in depth at the content of Spanish Act 37/2007, of 16 November, about the reuse of public sector information, as a case study, outlining some of the instruments that have been used in Spain as well as in other Member States to promote the reuse of public sector information.  相似文献   
164.
Vertebral artery removing constitutes a significant forensic pathology challenge. Dissection techniques during head-neck autopsy are based on anterior approach, a difficult method, which is unable to assess the transverse part of the artery. This work presents an original and simple method for dissecting vertebral arteries by a posterior approach, opening the vertebroarterial canal through the spinal canal without any special equipment. Once the spinal cord is removed, the transversarium foramens are opened by an internal cut at the pedicle and an external cut at the transverse process. This enables us to visualize vertebral arteries in its entirety. The method improves both the examination of the upper extracranial segment of the vertebral artery and the neuropathological study when arterial injury is suspected. Applying this method routinely is both feasible and useful in suspected cases of vertebral artery trauma and could contribute to assess more precisely the actual incidence of this injury.  相似文献   
165.
Traumatic vertebral artery dissection is not often seen by forensic pathologists, and cases investigated are scarce in the forensic literature. We present the case of a 40-year-old woman cyclist who was struck by a car while wearing a helmet, and was neurologically near normal immediately thereafter at Emergency. She presented 48 h later with acute right hemiparesis, decreasing level of consciousness, and unsteadiness. CT revealed massive cerebellar infarction. CT angiography was normal. The patient died in coma 7 days after injury and autopsy revealed bilateral edematous cerebellar infarction and bilateral vertebral artery dissection. Rotational neck injury and mural tear in the wall of the Atlantic parts of both vertebral arteries is suggested as the possible mechanism of the arterial injury. Head and neck injuries are reported as a precipitating cause of vertebral artery injury. The possible influence of trauma may be further underestimated if longer intervals between vessel dissection and ischemia occur. The current case illustrates that "talk-and-die" syndrome may be due to occult vertebral artery dissection, possibly bilateral. In forensic cases of delayed death after mild trauma to the head and neck, the vertebral arteries should be examined for the cause of death.  相似文献   
166.
The investigation of uncertain fatalities requires accurate determination of the cause of death, with assessment of all factors that may have contributed to it. Gasoline is a complex and highly variable mixture of aliphatic and aromatic hydrocarbons that can lead to cardiac arrhythmias due to sensitization of the myocardium to catecholamines or acts as a simple asphyxiant if the vapors displace sufficient oxygen from the breathing atmosphere. This work describes a sudden occupational fatality involving gasoline. The importance of this petroleum distillate detection and its quantitative toxicological significance is discussed using a validated analytical method. A 51 year-old Caucasian healthy man without significant medical history was supervising the repairs of the telephone lines in a manhole near to a gas station. He died suddenly after inhaling gasoline vapors from an accidental leak. Extensive blistering and peeling of skin were observed on the skin of the face, neck, anterior chest, upper and lower extremities, and back. The internal examination showed a strong odor of gasoline, specially detected in the respiratory tract. The toxicological screening and quantitation of gasoline was performed by means of gas chromatography with flame ionization detector and confirmation was performed using gas chromatography-mass spectrometry. Disposition of gasoline in different tissues was as follows: heart blood, 35.7 mg/L; urine, not detected; vitreous humor, 1.9 mg/L; liver, 194.7 mg/kg; lung, 147.6 mg/kg; and gastric content, 116,6 mg/L (2.7 mg total). Based upon the toxicological data along with the autopsy findings, the cause of death was determined to be gasoline poisoning and the manner of death was accidental. We would like to alert on the importance of testing for gasoline, and in general for volatile hydrocarbons, in work-related sudden deaths involving inhalation of hydrocarbon vapors and/or exhaust fumes.  相似文献   
167.
168.
In recent years a growing interest in gender diversity has arisen in the business context, and a significant number of research studies have analysed its effect on corporate performance. Nonetheless, these studies have not led to conclusive results, perhaps owing to the complexity of the relationship. The present work focuses on analysing two possible justifications of the contradictory effects of gender diversity on company performance: the business context and the optimum size of the female presence in decision-making bodies. The results obtained show that when working conditions and academic background are similar, women achieve better performance in sectors traditionally dominated by men. Moreover, to take the best advantage of gender diversity it is recommended that boards of directors should be balanced or have a slightly higher female presence.  相似文献   
169.
170.
Acts of violence recounted by 161 female victims of Intimate Partner Violence (IPV) attended at a psychological care service in Spain are presented. The relationship between acts of violence and feelings of danger, childhood abuse, and dyadic adjustment are analyzed. Reported acts of IPV were obtained through a Semi-structured Interview on Domestic Violence; and marital satisfaction was assessed with the Dyadic Adjustment Scale. The results showed women who have felt their lives were in danger are more likely to have been victimized. In addition, women who were both abused by their partner and sexually abuse as children are the ones that perceive more situations of danger in their adult couple relationship. The importance of studying perceived danger and the diversity of IPV experiences are discussed to aid prevention and intervention strategies.  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