全文获取类型
收费全文 | 1814篇 |
免费 | 78篇 |
专业分类
各国政治 | 92篇 |
工人农民 | 67篇 |
世界政治 | 163篇 |
外交国际关系 | 128篇 |
法律 | 874篇 |
中国共产党 | 1篇 |
中国政治 | 49篇 |
政治理论 | 506篇 |
综合类 | 12篇 |
出版年
2023年 | 10篇 |
2021年 | 15篇 |
2020年 | 36篇 |
2019年 | 43篇 |
2018年 | 74篇 |
2017年 | 80篇 |
2016年 | 59篇 |
2015年 | 42篇 |
2014年 | 61篇 |
2013年 | 294篇 |
2012年 | 52篇 |
2011年 | 81篇 |
2010年 | 46篇 |
2009年 | 44篇 |
2008年 | 75篇 |
2007年 | 77篇 |
2006年 | 89篇 |
2005年 | 66篇 |
2004年 | 64篇 |
2003年 | 61篇 |
2002年 | 38篇 |
2001年 | 21篇 |
2000年 | 23篇 |
1999年 | 20篇 |
1998年 | 24篇 |
1997年 | 21篇 |
1996年 | 14篇 |
1995年 | 21篇 |
1994年 | 27篇 |
1993年 | 18篇 |
1992年 | 13篇 |
1991年 | 14篇 |
1990年 | 12篇 |
1989年 | 14篇 |
1988年 | 17篇 |
1987年 | 18篇 |
1986年 | 10篇 |
1985年 | 17篇 |
1984年 | 11篇 |
1983年 | 15篇 |
1982年 | 13篇 |
1979年 | 10篇 |
1978年 | 13篇 |
1977年 | 11篇 |
1976年 | 12篇 |
1975年 | 13篇 |
1974年 | 11篇 |
1973年 | 8篇 |
1972年 | 11篇 |
1967年 | 8篇 |
排序方式: 共有1892条查询结果,搜索用时 0 毫秒
961.
Jeremy Smith 《欧亚研究》2019,71(6):972-993
AbstractThe essay challenges the frequent references to the concept of Soviet nationality policy by historians and social scientists. The argument proceeds, first, by unpicking some of the logic in the use of the term; second, by examining the evidence for the existence and nature of such a policy; and third, by considering alternative explanations for major decisions and events concerning non-Russian nationalities in the Soviet Union. The essay concludes that, at least after the 1920s, there was no Soviet nationality policy, and the processes of negotiation and nation-promoting practices pursued by republic leaders were, instead, the key influences on decision-making. 相似文献
962.
Taís R. Fiorentin Ph.D. Alex J. Krotulski M.S.F.S. David M. Martin Ph.D. Thom Browne M.S. Jeremy Triplett M.S. Trisha Conti Ph.D. Barry K. Logan Ph.D. 《Journal of forensic sciences》2019,64(3):888-896
The following report summarizes a study performed on seized drug exhibits collected in two U.S. states to evaluate the presence and identification of cutting agents. Aliquots of seized drug materials from Kentucky (n = 200) and Vermont (n = 315) were prepared using a dilute‐and‐shoot procedure. Initial analysis was performed using gas chromatography–mass spectrometry (GC‐MS) followed by analysis using liquid chromatography quadrupole time‐of‐flight mass spectrometry (LC‐QTOF). Active compounds detected overall included caffeine (31.0%), quinine/quinidine (24.7%), levamisole (11.6%), acetaminophen, (8.2%) and procaine (8.2%). These compounds were found with several drugs of abuse, such as heroin, fentanyl, methamphetamine, and cocaine. This novel information about cutting agents used to dilute or alter drugs of abuse is important to criminal investigations and in the management of acute intoxications at health centers. However, common methodologies for analysis and standard reporting practices frequently do not include cutting agents, resulting in lacking or inadequate information regarding prevalence of these substances. 相似文献
963.
The prevalence of psychosis among prisoners in England and Wales is ten times that in the household population and UK government policy is that prisoners should receive equivalent care to those in the community. This study investigated the implications of policy to divert more from the criminal justice system for psychiatric treatment. Psychotic prisoners were compared with psychotic persons in households and with other prisoners in two surveys of psychiatric morbidity in representative samples of the UK population. Psychotic prisoners were younger, more from ethnic minorities, with comorbid anxiety, substance misuse, ASPD, and childhood behavioural problems compared to psychotic persons in households. Less than a third had received previous inpatient treatment. Psychotic prisoners had similar criminal histories and higher psychopathy scores than non-psychopathic prisoners. Diversion is unfeasible without improved screening for psychosis and increasing bed numbers at higher levels of security to accommodate more patients who would pose high risk to the public. Future research should investigate why UK psychiatric services fail to identify psychotic prisoners and provide aftercare. 相似文献
964.
965.
966.
967.
968.
969.
970.
Expert surveys are frequently used in comparative politics to measure the ideological locations of political parties. However, it is possible that increasing the number of parties to place systematically biases results as experts try to fit more actors onto a common space. We test this possibility with an experiment embedded in an “expert” survey – with graduate students serving as our pool of experts to ensure an adequate sample size – by varying the number of parties to be placed in the United Kingdom and Germany. We find some tendency for the variance of Labor and SPD placements to diminish when more parties are present, and for SPD placements to move toward the center given more parties. However, we find no consistent evidence that the number of parties systematically affects mean or median party placements. Our results support the reliability of expert surveys as an indicator of party ideology. 相似文献