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   712篇
  免费   45篇
各国政治   56篇
工人农民   24篇
世界政治   69篇
外交国际关系   58篇
法律   382篇
中国政治   7篇
政治理论   152篇
综合类   9篇
  2023年   3篇
  2022年   3篇
  2021年   2篇
  2020年   11篇
  2019年   15篇
  2018年   31篇
  2017年   32篇
  2016年   30篇
  2015年   35篇
  2014年   25篇
  2013年   121篇
  2012年   20篇
  2011年   23篇
  2010年   16篇
  2009年   21篇
  2008年   19篇
  2007年   28篇
  2006年   27篇
  2005年   29篇
  2004年   27篇
  2003年   24篇
  2002年   29篇
  2001年   11篇
  2000年   12篇
  1999年   14篇
  1998年   10篇
  1997年   6篇
  1996年   13篇
  1995年   6篇
  1994年   9篇
  1993年   5篇
  1992年   5篇
  1991年   7篇
  1990年   3篇
  1989年   7篇
  1988年   5篇
  1987年   6篇
  1986年   10篇
  1985年   6篇
  1984年   4篇
  1983年   6篇
  1982年   3篇
  1981年   4篇
  1980年   6篇
  1979年   10篇
  1977年   3篇
  1976年   2篇
  1969年   3篇
  1968年   2篇
  1965年   1篇
排序方式: 共有757条查询结果,搜索用时 15 毫秒
201.
202.
The Federal Trade Commission and Department of Justice 2004 report Improving Health Care: A Dose of Competition expresses a clear allegiance to competition as the organizing principle for health care. In Europe, by contrast, the key organizing principle of health care systems is solidarity. Solidarity means that all have access to health care based on medical needs, regardless of ability to pay. This is not to say that competition is not important in Europe, but competition must take place within the context of solidarity. This article critiques the report from a European perspective, describes the role of competition in Europe (focusing in particular on European Union law), and suggests that the United States could learn from the European perspective.  相似文献   
203.
A 25-year retrospective study of cases of crush/traumatic asphyxia autopsied at Forensic Science SA, Adelaide, Australia from 1980 to 2004 was undertaken. A total of 79 cases of crush asphyxia was found consisting of 63 males (80%) and 16 females (20%). The age range of the males was 19-86 years (mean=41.8 years) and of the females was 19-75 years (mean=38.6 years). In 18 cases the exact circumstances of death were unclear, leaving 61 cases in which details of the fatal episode were available. Major categories included vehicle crashes (N=37), industrial accidents (N=9), farm accidents (N=6) and entrapment beneath vehicles (N=5). Forty of the 79 victims (51%) had only very minor bruises and abrasions; 28 (35%) had evidence of chest compression with rib and sternal fractures and large areas of soft tissue bruising of the chest; 7 cases (9%) had other significant injuries or findings that had contributed to death. All of these victims had signs of crush asphyxia in the form of intense purple congestion and swelling of the face and neck, and/or petechial hemorrhages of the skin of the face and/or conjunctivae. The pattern of pathological findings of crush asphyxia was not influenced by the presence or absence of concomitant serious or lethal injuries. In 4 cases (5%) where the circumstances of the lethal episode were those of crush asphyxia there were no characteristic pathological findings. This study has shown that a high percentage of crush asphyxias may be caused by vehicle accidents. It has also demonstrated that on occasion fatal crush asphyxia may have to be a diagnosis of exclusion, made only when there are characteristic death scene findings, and no evidence of lethal natural diseases or injuries at autopsy, with negative toxicological screening.  相似文献   
204.
Offenders who have committed serious violent acts while incarcerated are often segregated and housed in supermaximum security facilities. Given the highly restricted regime under which they are detained, it is often difficult to decide if they are safe enough to be discharged. However, there is a need to reintegrate them into the general offender population in a lower security institution for humane, correctional, and financial reasons. We propose a transitional strategy to facilitate their reintegration by way of a maximum-security step-down treatment-oriented facility within which both their security requirements and treatment needs could be adequately met. The present study reports the results of such an approach. More than 80% of the offenders (n = 31) were reintegrated into a lower-security facility without relapsing and being returned to the supermaximum institutions within a follow-up period of 20 months. They also have lower institutional offense rate postreintegration compared to prereintegration.  相似文献   
205.
206.
207.
208.
209.
210.
Inductively coupled plasma mass spectrometry (ICP-MS) was used to analyze glass evidence from a case in which a person broke a window in each of 15 vehicles in a parking lot in order to gain entry into the vehicles. The results of the analysis by traditional methods, which measure the properties of color, thickness, density, and refractive index, are also reported. A total of 15 known samples representing the windows on the cars and 42 questioned glass fragments recovered from the suspect and the police vehicle where the suspect was sitting were submitted for analysis. Density comparisons separated one of the known samples into three samples, increasing the number of known samples from 15 to 17. The concentrations of 16 elements were measured for all but three of the samples using an external calibration ICP-MS method with internal standardization. Color assessment (non-instrumental) separated the 17 known samples into two groups, and refractive index measurements resulted in six groups when the Emmons double variation method was used and ten groups when the Glass Refractive Index Measurement 2 (GRIM2) system was used. Elemental analysis, by itself, differentiated all of the known samples from each other and associated four of the known sample fragments with several of the questioned sample fragments. The informing power of RI, density, and elemental analysis comparisons is evaluated and a summary of the case results is reported.  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