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   194篇
  免费   9篇
各国政治   15篇
工人农民   5篇
世界政治   12篇
外交国际关系   10篇
法律   103篇
政治理论   57篇
综合类   1篇
  2021年   2篇
  2020年   5篇
  2019年   3篇
  2018年   8篇
  2017年   7篇
  2016年   2篇
  2015年   2篇
  2014年   2篇
  2013年   24篇
  2012年   4篇
  2011年   6篇
  2010年   8篇
  2009年   3篇
  2008年   6篇
  2007年   6篇
  2006年   5篇
  2005年   5篇
  2004年   8篇
  2003年   4篇
  2002年   9篇
  2001年   2篇
  2000年   4篇
  1999年   2篇
  1996年   2篇
  1995年   2篇
  1994年   4篇
  1993年   1篇
  1992年   3篇
  1991年   1篇
  1989年   3篇
  1988年   5篇
  1987年   2篇
  1986年   2篇
  1985年   6篇
  1983年   3篇
  1982年   6篇
  1981年   2篇
  1980年   3篇
  1979年   1篇
  1978年   3篇
  1977年   6篇
  1976年   2篇
  1975年   1篇
  1974年   3篇
  1973年   4篇
  1972年   2篇
  1970年   2篇
  1969年   2篇
  1968年   2篇
  1966年   1篇
排序方式: 共有203条查询结果,搜索用时 31 毫秒
71.
Echinococcosis is an endemic disease, most common in sheep-raising communities, usually caused by the larval or cyst stage of the tapeworm Echinococcus granulosus. Isolated cardiac hydatid cyst is uncommon at any age, occurs through the coronary circulation, and accounts for less than 3% of all hydatid disease. We describe a case of an 1%-year-old female, who died suddenly. The post-mortem examination revealed an isolated cyst in the left ventricle of the heart with intact wall. The cytologic examination of the cyst fluid demonstrated the presence of the characteristic scolices and hooklets and established the diagnosis of cardiac hydatid cyst. The present case is of special interest because of the rare primary localization and the onset of sudden death in a young person as the initial manifestation of the disease.  相似文献   
72.
In this contribution are presented the fermentations of the main substrates present in a decaying corpse, namely carbohydrates, amino acids, glycerol and fatty acids, generating the post-mortem volatile compounds that could be detected along with ethanol during the forensic ethanol analysis. The available literature (preferably reviews) on microbial metabolic pathways (enzymes, substrates, conditions) that are implicated in the formation of these volatiles has been reviewed. The microbial formation of the following volatiles is supported by the presented biochemical data: ethanol, acetaldehyde, acetone, 2-propanol, 1-propanol, 1-butanol, isobutanol, isoamyl alcohol, d-amyl alcohol, acetate, propionate, butyrate, isobutyrate and ethyl esters (mainly ethyl acetate). The extracted information was correlated with the existing forensic literature on the post-mortem detected volatiles. The significance of the microbial produced volatiles on the selection of an appropriate internal standard for the ethanol analysis has been considered. Finally, the possible contribution of the presence of volatiles in the interpretation of ethanol analysis results in post-mortem cases is discussed.  相似文献   
73.
74.
Economic Change and Restructuring - This paper investigates empirically the fertility rebound in low- and high-income OECD countries for the period 1970 to 2016. The focus is on the turning points...  相似文献   
75.
76.
77.
We develop a model of the plaintiff's decision to file a lawsuitthat has implications for how differences between the federalgovernment and private litigants translate into differencesin trial rates and plaintiff win rates at trial. Our case selectionmodel generates a set of predictions for relative trial ratesand plaintiff win rates, depending on the type of case and whetherthe government is defendant or plaintiff. To test the model,we use data on about 474,000 cases filed in federal districtcourt between 1979 and 1994 in the areas of personal injuryand job discrimination, in which the federal government andprivate parties work under roughly similar legal rules. We findbroad support for the predictions of the model.  相似文献   
78.
79.
This paper examines the role that patents play in transferring technology. The history of our patent system and the requirements for patentability are reviewed. The option of keeping an invention as a trade secret rather than applying for a patent is presented. The paper also discusses the rationale behind the government’s change in its policy which permits exclusive licensing of public-owned patents. The author concludes that patents are not a barrier but a significant help in promoting technology transfer.  相似文献   
80.
Should there be civil liability when a person who could easily and without risk rescue another fails to do so? It is argued that the failure to act does not cause the harm that follows, and that the misfeasance/nonfeasance distinction provides no basis for liability. In spite of this, it is maintained that there can sometimes be a duty to rescue, and even a right to be rescued, even in the absence of a voluntary undertaking or an explicit assumption of responsibility. There are convincing arguments for some sort of legal recognition of a duty to rescue, but these arguments do not support tort liability. Nor is a case for tort liability made with the argument that a growth of tort law in this direction would be compatible with the values most centrally involved in the division between torts and contracts. Furthermore, there is a case against tort liability — namely, that the purpose of tort liability is to compensate, that there are certain sorts of situations in which compensation is apposite, and that failure to rescue does not fit into these categories. Criminal liability is the appropriate way for the law to recognize a duty to rescue.  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