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   11610篇
  免费   283篇
各国政治   518篇
工人农民   395篇
世界政治   754篇
外交国际关系   435篇
法律   7448篇
中国共产党   1篇
中国政治   43篇
政治理论   2185篇
综合类   114篇
  2020年   115篇
  2019年   154篇
  2018年   221篇
  2017年   224篇
  2016年   257篇
  2015年   175篇
  2014年   210篇
  2013年   1155篇
  2012年   304篇
  2011年   322篇
  2010年   240篇
  2009年   276篇
  2008年   295篇
  2007年   281篇
  2006年   303篇
  2005年   228篇
  2004年   248篇
  2003年   263篇
  2002年   239篇
  2001年   487篇
  2000年   459篇
  1999年   355篇
  1998年   139篇
  1997年   159篇
  1996年   125篇
  1995年   129篇
  1994年   144篇
  1993年   130篇
  1992年   261篇
  1991年   272篇
  1990年   274篇
  1989年   279篇
  1988年   262篇
  1987年   256篇
  1986年   252篇
  1985年   222篇
  1984年   198篇
  1983年   199篇
  1982年   121篇
  1981年   114篇
  1980年   93篇
  1979年   156篇
  1978年   96篇
  1977年   83篇
  1976年   85篇
  1975年   91篇
  1974年   116篇
  1973年   101篇
  1972年   85篇
  1971年   78篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
Postmortem changes in sulfide concentrations in body tissues were examined in autopsied rats exposed to hydrogen sulfide concentrations of 550 to 650 ppm, and in nonexposed rats and humans. Analyses were made by gas chromatography, following an extractive alkylation. Sulfide concentrations in the blood, liver, and kidneys of rats increased in both the exposed and nonexposed groups, depending on the lapse of time after death. On the other hand, the lung, brain, and muscle showed little or no change in sulfide concentration with elapse of time after death. The data obtained from human tissues were almost the same as those for rats, except data for blood, in which no or little increase of sulfide was observed.  相似文献   
53.
54.
A method ist described to determine the CO-content in the tissue of muscles. The prepared tissue is pulverized in a swinging mill at the temperature of liquid nitrogen. Parts of the powder are weighed into headspace vessels. Carbon monoxide ist ejected by a formerly described method and measured gaschromatographically. The Fe-content is determined after an acid disintegration by AAS. Acute intoxications lead to higher CO-contents in heart than in periphere muscles. Chronic exposure to carbon monoxide does not produce these differences.  相似文献   
55.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses.  相似文献   
56.
57.
Many scholars in International Relations (IR) have drawn from popular films to examine various problématiques that have informed the discipline's main theorisations. As Cynthia Weber remarks, popular films are powerful because they engage in the very ‘serious political work’ of mythologising the ‘truths’ and ‘realities’ which provide the foundation for many of IR's main theoretical envisionings of our world. To date, however, children's films have received very little attention. For the purpose of this paper, three have been isolated: Toy Story (1995), A Bug's Life (1998) and Rescue Heroes: The Movie (2003). Children's films, it can be argued, help to craft and restore certain perspectives for each new generation of young minds during the crucial years when the world is being textualised for the first time. The objective of this paper, therefore, is to read these films as working towards producing and sustaining the power/knowledge that seeks to defend contemporary forms of world order while concurrently extending and disseminating the rule of these forms of world order through the medium of children's popular cinema.  相似文献   
58.
59.
A dissecting intramural haematoma of the coronary artery is an infrequent cause of sudden and unexpected death. Most cases are women and in a significant number of these women, the haematoma occurred at term to 80 days postpartum. Because the intimal rupture and communication with the lumen were not found in most of the cases, the site of rupture has been considered to be a vasa vasorum. The authors report on a case of one woman who was at a later postpartum period (106 days). The microscopic finding of the dissected coronary artery revealed two intimal tears in a section. The case showed that the dissecting intramural haematoma of the coronary artery is caused not only by the rupture of the vasa vasorum but also by the rupture of the intima.  相似文献   
60.
Distinctive blunt force injuries caused by a crescent wrench.   总被引:1,自引:0,他引:1  
  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