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   10059篇
  免费   319篇
各国政治   544篇
工人农民   432篇
世界政治   627篇
外交国际关系   322篇
法律   6136篇
中国共产党   4篇
中国政治   65篇
政治理论   2160篇
综合类   88篇
  2020年   124篇
  2019年   163篇
  2018年   235篇
  2017年   256篇
  2016年   245篇
  2015年   174篇
  2014年   174篇
  2013年   1147篇
  2012年   256篇
  2011年   254篇
  2010年   216篇
  2009年   242篇
  2008年   293篇
  2007年   264篇
  2006年   308篇
  2005年   259篇
  2004年   266篇
  2003年   241篇
  2002年   260篇
  2001年   297篇
  2000年   296篇
  1999年   217篇
  1998年   134篇
  1997年   143篇
  1996年   123篇
  1995年   118篇
  1994年   109篇
  1993年   131篇
  1992年   200篇
  1991年   217篇
  1990年   199篇
  1989年   205篇
  1988年   181篇
  1987年   203篇
  1986年   193篇
  1985年   188篇
  1984年   175篇
  1983年   181篇
  1982年   114篇
  1981年   116篇
  1980年   90篇
  1979年   115篇
  1978年   84篇
  1977年   90篇
  1976年   67篇
  1975年   69篇
  1974年   69篇
  1973年   79篇
  1972年   66篇
  1968年   60篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Hoefler JM  Kamoie BE 《Law & policy》1992,14(4):337-380
The right to die may be among the most legally complex and culturally sensitive areas of civil rights to emerge in our time. The thorny issues associated with a terminally ill individual's right to self-determination, and the disposition of individuals who are incompetent to make right to die decisions for themselves, promises to keep all parties involved - health care professionals, medical ethicists, families, lawyers, judges, and state legislators -busy for some time to come. To this point, the state courts have taken the lead in the right to die debate, while the state legislatures have tended to drag their collective feet. This article lays the case law groundwork for right to die decision making, then goes on to assay the legislative responses to the issue that have been rendered in the fifty states.  相似文献   
103.
104.
105.
We report seven fatalities resulting from the ingestion of illicit drugs packaged in condoms, rubber balloons, or plastic bags which were observed in the last 4 years at the Office of the Chief Medical Examiner, State of Maryland. All the victims, with the exception of one, were men ranging in age from 19 to 37 years. There was no racial predominance. No drug paraphernalia was found at any scene. In two cases, seizure-like activity was documented. One victim had recently returned from Nigeria; therefore, Lassa fever was initially suspected. Two of the victims were "body packer" contrabanders who had just arrived from Africa. They used body cavities to hide large amounts of heroin to avoid U.S. Customs. The other five cases were "mini-packers," small-time illicit drug dealers who had swallowed a single bag of cocaine to avoid police detection. The possible mechanism of leaking or rupture of the latex container is discussed.  相似文献   
106.
Analysis of a sample of 1108 radii corresponding to 567 black and white North Americans in the Terry Collection at the Smithsonian Institution demonstrates that the diameter of the radial head is an accurate sex discriminator for human remains. A simple "radial-head method" of sex determination consists of measuring the maximum and minimum diameters of the head and comparing such measurements with the test cutoff points. The subject is female when the maximum radial head diameter (either left or right) is less than or equal to 21 mm, and male when the maximum diameter (either left or right) is greater than or equal to 24 mm. The same decisions apply to the minimum diameters of 20 mm or less and 23 mm or more, respectively. When the maximum diameter is 23 mm or the minimum is 22 mm, the subject is more likely male; when the maximum diameter is 22 mm or the minimum is 21 mm, the subject is more likely female. The sample frequency of any one of these latter diameters is never more than 16%. Cross-validation of the method with a sample of 50 pairs of radii of the Terry Collection, different from the original specimens, resulted in 92% sexing accuracy when using the left radius singly, 94% accuracy when using the right radius singly, and 96% accuracy when using both radii jointly.  相似文献   
107.
During preliminary examination of the body of a homicide victim, a peculiar red "fiber" was noticed and recovered. Initially believing this to be a carpet fiber, the item was subjected to fiber analysis. It was found to be a short coiled particle not like any known natural or synthetic fabric fiber. Subsequent examinations determined this "fiber" to be the larva of a common freshwater midge (Diptera; Chironomidae). Chironomid larvae have been observed on other bodies recovered from freshwater environments. Entomological studies of this organism have led to the conclusion that the presence of chironomid larvae indicates submersion of the body.  相似文献   
108.
Programme based on mathematical model of the process of dead body temperature changing was developed for estimation of postmortem interval. Automatic retrieval of problem solution was performed on programmable microcalculators of "Electronica MK-61" type using adaptive approach. Diagnostical accuracy in case of dead body being preserved in permanent cooling conditions is +/- 3%.  相似文献   
109.
110.
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