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   4748篇
  免费   166篇
各国政治   232篇
工人农民   182篇
世界政治   339篇
外交国际关系   126篇
法律   2991篇
中国共产党   1篇
中国政治   28篇
政治理论   984篇
综合类   31篇
  2020年   60篇
  2019年   68篇
  2018年   85篇
  2017年   104篇
  2016年   104篇
  2015年   94篇
  2014年   87篇
  2013年   489篇
  2012年   130篇
  2011年   120篇
  2010年   106篇
  2009年   105篇
  2008年   133篇
  2007年   130篇
  2006年   128篇
  2005年   123篇
  2004年   126篇
  2003年   120篇
  2002年   112篇
  2001年   181篇
  2000年   169篇
  1999年   128篇
  1998年   68篇
  1997年   52篇
  1996年   43篇
  1995年   56篇
  1994年   50篇
  1993年   47篇
  1992年   91篇
  1991年   88篇
  1990年   106篇
  1989年   87篇
  1988年   83篇
  1987年   83篇
  1986年   104篇
  1985年   109篇
  1984年   76篇
  1983年   78篇
  1982年   50篇
  1981年   47篇
  1980年   44篇
  1979年   48篇
  1978年   55篇
  1976年   35篇
  1975年   46篇
  1974年   61篇
  1973年   55篇
  1972年   42篇
  1970年   34篇
  1969年   41篇
排序方式: 共有4914条查询结果,搜索用时 15 毫秒
951.
In this article I analyze both generalized propriety as a boundary marker of Sudanese identity in Cairo, and gendered attitudes toward morality and female genital cutting (FGC) as a fundamental aspect of that boundary. Sudanese have been profoundly affected by the ongoing political crisis in their home country, by the displacement triggered by political and economic collapse, and by their deteriorating legal and social status in Egypt. The dramatic changes in the circumstances of Sudanese residence in Cairo have challenged the cultural norm of gender complementarity as men ‘stay at home’ for want of work while women seek and find new opportunities for themselves. This unstable situation has led Sudanese to place more emphasis on ‘proper’ ways of behaving and being, an assertion that helps define the ethnic boundaries of the Sudanese community in Cairo. I demonstrate the inconsistencies between discourse and reality through ethnographic data while analyzing how Sudanese have found new ways of asserting their identity and resisting the practice of FGC.  相似文献   
952.
The Demand for Land Title Registration: Theory with Evidence from Kenya   总被引:1,自引:0,他引:1  
This article examines the role of title registration in providingsecurity of property rights for landowners. A simple model isdeveloped to examine the trade-off between increased securityof registering title against the administrative costs of accessingthe system. The model predicts that the demand for registrationshould be increasing in the value of the land, the educationof the landowner, and proximity to the central government (thelatter two being measures of the cost of accessing the system).Evidence on land registration in Kenya provides support forthe model.  相似文献   
953.
52 autopsy cases in combination with falls on staircases examined in the Bonn Institute of Legal Medicine in 1992 to 2000 were evaluated with respect to the query whether the morphological criteria were valid for reconstruction of the fall, in what way facial injuries were involved and whether isolated trunk injuries caused the death. In 80 per cent of all cases the localization of impact on skull and trunk could be deliminated in regards to heaviness of injuries with fractures and involvement of inner organs. Facial injuries were noticed in 50 per cent and were--as well as arm and leg injuries--caused by strike in fall or after impact. In only two cases in consequence of falls on staircases trauma of the trunk led to death by bleeding.  相似文献   
954.
In cases of lethal firearm injuries computer enhanced anatomical feasibility studies can provide unambiguous clues concerning self-versus extraneous infliction. To this end individualized digital 3-dimensional geometrical models of the victim and the weapon are generated true to scale with the help of the CAD software (POSER Version 4, egi.sys AG). All anatomical data relevant to the motion apparatus and the range of movement as well as the injuries of the individual victim are carefully documented and serve as input parameters for the digital geometrical model. The bullet path is visualized as a cylinder between entrance and exit wound. A series of simulation sequences then can be carried out by the variation of anatomically possible shot positions and the virtual grasp of the weapon. An exact alignment of the firearm's barrel and the bullet path is a reliable statement for the feasibility of self-infliction. In addition to circumstantial evidence the digital reconstruction of the firearm shot admits of unambiguous conclusions about the course of the traumatic event.  相似文献   
955.
This study examined the relationship between psychopathy and malingering in a subsample of male prison inmates (n = 55) participating in a larger study of the clinical utility of various assessment measures in correctional settings. Participants' capacity to feign major mental illness successfully was evaluated using standard cutoff scores for the detection of malingering on a variety of instruments, including the Structured Inventory of Malingered Symptomatology (SIMS; G. P. Smith & G. O. Burger, 1997), the Structured Interview of Reported Symptoms (SIRS; R. Rogers, R. M. Bagby, & S. E. Dickens, 1992), and the Personality Assessment Inventory (PAI; L. Morey, 1991). Psychopathic traits were assessed via the Psychopathic Personality Inventory (PPI; S.O. Lilienfeld & B. P. Andrews, 1996). Correlations between the malingering indices and the PPI were low (–.14 to .14) and not statistically significant. These findings fail to support the clinical intuition that individuals with higher levels of psychopathy are likely to be more adept at malingering.  相似文献   
956.
Oronasal secretions are observed frequently in sudden infant death syndrome (SIDS), but overt blood is uncommonly reported. The literature on oronasal blood in sudden infant death is limited. The goal of this study was to determine the frequency of oronasal blood in sudden infant deaths and to examine possible causative factors. Oronasal blood was described in 28 (7%) of 406 cases of sudden infant death. Oronasal blood could not be attributed to cardiopulmonary resuscitation in 14 cases, including 10 (3%) of 300 cases of SIDS, 2 (14%) of 14 accidental suffocation cases, and 2 (15%) of 13 undetermined cases. Eight of the 10 infants in cases of sudden infant death were bedsharing: 5 with both parents, 2 between both parents. The infant in 1 SIDS case was from a family that had had three referrals to Child Protective Services. Oronasal blood not attributable to cardiopulmonary resuscitation occurs rarely in SIDS when the infant is sleeping supine in a safe environment. Bedsharing may place infants at risk of suffocation from overlaying. Oronasal blood observed before cardiopulmonary resuscitation is given is probably of oronasal skin or mucous membrane origin and may be a sign of accidental or inflicted suffocation. Sanguineous secretions that are mucoid or frothy are likely of remote origin, such as lung alveoli. The use of an otoscope to establish the origin of oronasal blood in cases of sudden infant death is recommended.  相似文献   
957.
958.
Identifying an insect specimen is an important first step in a forensic-entomological analysis. However, diagnostic morphological criteria are lacking for many species and life stages. We demonstrate a method for using mitochondrial DNA sequence data and phylogenetic analysis to identify any specimen of the blow fly subfamily Chrysomyinae likely to be collected from a human corpse within Canada or the USA. The reliability of the method was illustrated by analyzing specimens designed to mimic the information likely to be obtained from highly degraded specimens as well as specimens collected from widely separated geographic locations. Our sequence database may be suitable for another country provided the investigator knows the local fly fauna well enough to narrow the choice of chrysomyine species to those used in this study.  相似文献   
959.
To improve the possibilities of delimitating the time of death after longer laytime it was examined if this is possible by immunohistochemical detection of calcitonin. The results show that in our examination material the c-cells of the thyroid glands of up to 4-day-old corpses produce a positive immunoreaction towards calcitonin in all cases whereas none of the corpses older than 13 days show such a reaction. This means that in the case of a negative immunoreaction the time of death can be assumed to lie >4 days before the autopsy. The fact that a negative immunoreaction occurred consistently after 13 days leads to the conclusion that when calcitonin has been stained in a specimen, the death of the respective person must lie a maximum of 12 days earlier, whereby these time-limits may change in considerably different surrounding conditions.  相似文献   
960.
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