全文获取类型
收费全文 | 848篇 |
免费 | 37篇 |
专业分类
各国政治 | 40篇 |
工人农民 | 27篇 |
世界政治 | 73篇 |
外交国际关系 | 46篇 |
法律 | 486篇 |
中国共产党 | 2篇 |
中国政治 | 11篇 |
政治理论 | 162篇 |
综合类 | 38篇 |
出版年
2023年 | 8篇 |
2022年 | 7篇 |
2021年 | 6篇 |
2020年 | 24篇 |
2019年 | 24篇 |
2018年 | 29篇 |
2017年 | 26篇 |
2016年 | 34篇 |
2015年 | 26篇 |
2014年 | 36篇 |
2013年 | 105篇 |
2012年 | 39篇 |
2011年 | 38篇 |
2010年 | 39篇 |
2009年 | 33篇 |
2008年 | 38篇 |
2007年 | 26篇 |
2006年 | 31篇 |
2005年 | 41篇 |
2004年 | 34篇 |
2003年 | 30篇 |
2002年 | 30篇 |
2001年 | 30篇 |
2000年 | 27篇 |
1999年 | 12篇 |
1998年 | 16篇 |
1997年 | 3篇 |
1996年 | 7篇 |
1995年 | 11篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 7篇 |
1988年 | 7篇 |
1987年 | 2篇 |
1986年 | 10篇 |
1984年 | 2篇 |
1983年 | 6篇 |
1982年 | 3篇 |
1978年 | 3篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 4篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1969年 | 1篇 |
1967年 | 3篇 |
1963年 | 1篇 |
排序方式: 共有885条查询结果,搜索用时 31 毫秒
791.
The introduction of electronic systems into the comparison of weapon marks in the mid 1990s caused a revolution in the discipline of “forensic ballistics”. Most European states now use this technology to search their national open case files.Globalisation of crime and the loss of effective border controls have made the idea of a unified European ballistic system seem logical.The article critically considers the requirements and possible outcomes of such a system. Based on the experience of forensic practitioners it seems probable that a shared European electronic ballistic system will be of a very limited value at present. Further improvements of existing systems to reach compatibility are encouraged. 相似文献
792.
Whistleblowers, employees of conscience who report on wrongdoing, integrate into their socially useful role one of exposing institutional torpor and bureaucratic incompetence in those official structures responsible for the investigation and correction of wrongdoing. This paper reports on the finding from Australia's largest study into whistleblowers. It shows a crisis of competence in the official capacity of government structures to respond effectively to disclosures made in the public interest. 相似文献
793.
Judith Innes De Neufville 《Policy Sciences》1978,10(2-3):171-188
Although validity of an indicator, that is, whether it means what it purports to, is critical to its legitimate use in policy, there are few systematic approaches to validation. The reason lies largely in the traditions of positivist social science which require the separation of fact and theory and allow no place for meaning and valuation. The paper proposes approaches to test the validity of both indicators and the conceptual frameworks on which they are based. The most powerful forms of validation require the application of a priori concepts and models. Validation is partly judgmental and never simply mechanical. The validity of a measure is dependent on the context of its use. Social and political processes are an important part of validation, particularly in determining the appropriateness of the assumptions. If an indicator is to be valid, it should be chosen or designed iteratively with the policies it will help to shape.The author wishes to thank Sir Geoffrey Vickers, Professor Martin Krieger and Dr. Norman Shulman for their thoughtful comments on an earlier version of this paper. 相似文献
794.
795.
796.
797.
798.
799.
Using data from a Canadian national representative sample survey of male university and college students, this study tested three hypotheses from a theoretical model which attempts to explain the relationship between male peer group dynamics and sexual assault in dating relationships. Consistent with previous research conducted in the United States, the findings reported here show that male peer support is a significant predictor of sexual abuse in post-secondary school courtship. This article concludes with several suggestions for further research. 相似文献
800.
Paraquat, a useful contact herbicide is now used in over 130 countries of the world, including Sri Lanka. The number of cases of accidental poisoning reported with paraquat is small, relative to instances of suicide. When a clear history is not available, accidental paraquat poisoning is sometimes difficult to diagnose. A 9-year-old boy was admitted to a peripheral hospital with a history of diarrhoea and vomiting. He later developed abdominal pain, subcutaneous emphysema and difficulty in breathing. Following transfer to a district hospital and then to a teaching hospital, poisoning with paraquat was suspected only on day 11 of the illness. On persistent questioning, on day 13 of the illness the child remembered that the day prior to the onset of illness, on his way from a shop, he felt thirsty and having found an empty bottle of Gramoxone (paraquat) on the wayside he used it to drink water from a water tank. The child died on day 17 and the histology of the lung showed typical changes of paraquat poisoning. This tragic episode emphasises the need for proper disposal of empty containers of all poisonous substances. 相似文献