全文获取类型
收费全文 | 458篇 |
免费 | 20篇 |
专业分类
各国政治 | 25篇 |
工人农民 | 76篇 |
世界政治 | 33篇 |
外交国际关系 | 16篇 |
法律 | 206篇 |
中国政治 | 7篇 |
政治理论 | 114篇 |
综合类 | 1篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 9篇 |
2018年 | 21篇 |
2017年 | 19篇 |
2016年 | 22篇 |
2015年 | 15篇 |
2014年 | 9篇 |
2013年 | 61篇 |
2012年 | 10篇 |
2011年 | 13篇 |
2010年 | 11篇 |
2009年 | 13篇 |
2008年 | 10篇 |
2007年 | 13篇 |
2006年 | 10篇 |
2005年 | 20篇 |
2004年 | 22篇 |
2003年 | 14篇 |
2002年 | 16篇 |
2001年 | 9篇 |
2000年 | 9篇 |
1999年 | 5篇 |
1998年 | 11篇 |
1997年 | 12篇 |
1996年 | 6篇 |
1995年 | 8篇 |
1994年 | 10篇 |
1993年 | 6篇 |
1992年 | 9篇 |
1991年 | 6篇 |
1990年 | 9篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 6篇 |
1981年 | 5篇 |
1980年 | 3篇 |
1978年 | 6篇 |
1976年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1971年 | 3篇 |
1970年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有478条查询结果,搜索用时 15 毫秒
151.
The bovine spongiform encephalopathy (BSE) outbreak in the United Kingdom is regarded as one of the worst public policy crises the British government has experienced during the postwar era. In material terms, it has led to the slaughter of 3.3 million cattle and estimated economic losses of £3.7 billion. In administrative terms, the crisis brought about the dissolution of the Ministry of Agriculture, Fisheries and Food. This article examines the istitutional context in which decisions about the scientific evidence on BSE were made. The authors argue that a centralized system in which government agencies control science for government is inherently vulnerable to alliances of experts and interest groups that undermine the credible assessment of public health and safety risks. Specific societal conditions may encourage risk-opportunistic behavior among policy makers that is conducive to delays and inaction until such time as the evidence of a health risk becomes overwhelming. 相似文献
152.
153.
Wendy K. Mariner 《Law & social inquiry》1988,13(2):385-406
154.
Wendy L. Hansen Neil J. Mitchell Jeffrey M. Drope 《American journal of political science》2005,49(1):150-167
Since Mancur Olson's Logic of Collective Action (1965), it is impossible for political scientists to conceive of political participation without reference to his powerful argument linking numbers of participants, public goods, and participatory outcomes. What is puzzling is the poor empirical support for this argument in the domain where it should work best, namely explaining business political activity. Olson thought his arguments principally applicable to economic groups, and for the empirical development of his arguments Olson drew heavily on business interests, the most active segment of the interest group community. We explore these arguments with business political activities data by examining the statistical performance of various measures of market structure in determining business political activity, and find little empirical support. We do offer an alternative basis for business behavior lodged in both private and collective goods that preserves business rationality and also helps explain not only the amount of business political participation but the modes of business participation . 相似文献
155.
156.
157.
158.
159.
Wendy C. Grenade 《圆桌》2016,105(5):509-518
AbstractOn 23 June 2016, 52% of Britons voted in a referendum to exit (Brexit) the European Union (EU) while 48% opted to remain. This is a watershed moment in world politics, given the implications for the future of the UK, the EU and the rest of the world. This paper uses the case of Brexit to analyse paradoxes of regionalism and democracy. The central question is, what does the case of Brexit suggests about the contradictions of democracy and regionalism in the 21st century? Importantly, what broad lessons may be gleaned from the case for regionalist projects among Commonwealth countries? 相似文献
160.
Shu-Hua Zhang PhD Angeline S. Y. Tang BSc Reenie S. L. Chin BSc Jia Ying Goh BSc Mei Ching Ong PhD Wendy J. L. Lim BSc Angeline T. W. Yap PhD Cheuk-Wai So PhD 《Journal of forensic sciences》2023,68(3):1009-1019
With the emergence of new psychoactive substances (NPSs) over the years, the substances detected on stamps (also known as blotter papers) have also evolved from the traditional drug—lysergic acid diethylamide (LSD) to the multiple variants of lysergamides such as ALD-52 and 1P-LSD. The analysis of such blotter papers is usually done by solvent extraction followed by identification using gas chromatography–mass spectrometry (GC-MS). This study has shown that hydrolysis to form LSD was observed in GC-MS analysis when ALD-52 was extracted with methanol. The extraction of ALD-52 using other solvents such as acetonitrile, ethanol, isopropyl alcohol, ethyl acetate, and acetone, followed by GC-MS analysis, was investigated. It is shown that alcoholic solvents such as methanol and ethanol will result in the conversion of ALD-52 to LSD during GC-MS analysis, whereas the sterically hindered isopropyl alcohol will prevent this conversion. Investigation also shows that the hydrolysis of ALD-52 to LSD occurs at the GC injector port. It was also observed that the degree of hydrolysis was more pronounced at a lower concentration (0.1 mg/mL). The study was extended to a close analog—1P-LSD, and the results showed that 1P-LSD similarly hydrolyzes to LSD. However, 1P-LSD was observed to be more stable than ALD-52 due to steric hindrance because of the propanoyl group. 相似文献