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   552篇
  免费   25篇
各国政治   28篇
工人农民   65篇
世界政治   65篇
外交国际关系   17篇
法律   281篇
中国政治   6篇
政治理论   111篇
综合类   4篇
  2023年   3篇
  2020年   8篇
  2019年   12篇
  2018年   20篇
  2017年   16篇
  2016年   26篇
  2015年   12篇
  2014年   11篇
  2013年   78篇
  2012年   12篇
  2011年   16篇
  2010年   9篇
  2009年   26篇
  2008年   21篇
  2007年   24篇
  2006年   22篇
  2005年   11篇
  2004年   12篇
  2003年   13篇
  2002年   15篇
  2001年   17篇
  2000年   11篇
  1999年   12篇
  1998年   7篇
  1997年   9篇
  1996年   12篇
  1995年   6篇
  1994年   5篇
  1993年   6篇
  1992年   6篇
  1991年   7篇
  1990年   7篇
  1989年   4篇
  1988年   8篇
  1987年   4篇
  1985年   5篇
  1984年   6篇
  1983年   9篇
  1982年   9篇
  1981年   6篇
  1980年   4篇
  1979年   7篇
  1978年   7篇
  1977年   3篇
  1976年   3篇
  1975年   6篇
  1974年   6篇
  1973年   3篇
  1967年   3篇
  1966年   2篇
排序方式: 共有577条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
Carbon monoxide (CO) poisoning as a cause of death is well documented in industrialized countries. The objective of this study was to compare demographic data in deaths due to accidents (in fires) and suicides in the same population between 1988 and 1998. Furthermore, the potential effect of a community wide education effort regarding safety in the home was assessed. Postmortem reports were reviewed for all deaths examined at the Office of the Cuyahoga County Coroner in Cleveland, OH, USA. During the study period, there were 209 accidental deaths due to fires in the home (6.5% of all accidents in the home) and 182 CO deaths by suicide (9.8% of all suicides). Demographic characteristics of the two groups differed: while males represented the majority of cases in both groups (55% of accidents, 70% suicides), race specific death rates were higher for whites than blacks (18/100,000 white, 3/100,000 black) in suicides compared with 29/100,000 deaths for blacks and 11/100,000 for whites in accidental cases. Fire deaths were prevalent in the young (0-9 years) and old (>60) whereas in the suicide group the age specific death rate was highest for those over 70 years. The majority of fire deaths occurred in the city of Cleveland but suicides were prevalent in the suburbs. More fire deaths occurred in December than any other month whereas more suicides occurred in April. In 1992, there was a community wide effort to provide free smoke detectors to residents in Cleveland. In 1992, there were 4.2/100,000 fire deaths in the city. This decreased to 0.6/100,000 in 1996, increased to 1.2/100,000 in 1997 followed by a decrease to 0.8/100,000 in 1998. This suggested that the program may have aided in decreasing these types of deaths. Deaths due to fires in the suburbs were <1/100,000 throughout the study period.  相似文献   
45.
46.
Suicide by asphyxiation with a plastic bag placed over the head is a method that has been advocated by right-to-die groups. Recently, such groups have proposed the introduction of helium into the plastic bag as a means of hastening death. Helium is readily available at toy stores, where it is sold in tanks for balloon inflation. It produces asphyxiation by the exclusion of oxygen in enclosed spaces. We report 7 fatalities throughout an 18-month period involving plastic bag suffocation in conjunction with helium use. These fatalities coincide with publication of an update to a popular right-to-die text in which this method is described. Although right-to-die literature was absent from all scenes, this method was not previously observed in our jurisdiction, and the deaths likely reflect exposure to this information. Because of analytical difficulties in testing for helium in biologic specimens, death certification rests on scene investigation.  相似文献   
47.
The presence of cocaine in illicit drug samples is still being determined in some laboratories using spot tests and microcrystal tests. Seventeen chemical species were tested using three different spot tests (Wagner, Marquis, and cobalt thiocyanate followed by stannous chloride reactions) and two microcrystal tests (gold chloride and platinic chloride) to determine whether the results could be differentiated from the results of these tests on cocaine. The data obtained indicated that nine of the 17 compounds gave results similar to those from cocaine using the three spot tests, but that the results from microcrystal testing allowed for differentiation of all nine compounds from cocaine.  相似文献   
48.
49.
Morris  Herbert 《Law and Philosophy》1999,18(4):363-378
Law and Philosophy -  相似文献   
50.
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