全文获取类型
收费全文 | 8957篇 |
免费 | 347篇 |
专业分类
各国政治 | 473篇 |
工人农民 | 303篇 |
世界政治 | 770篇 |
外交国际关系 | 372篇 |
法律 | 4857篇 |
中国共产党 | 1篇 |
中国政治 | 46篇 |
政治理论 | 2411篇 |
综合类 | 71篇 |
出版年
2020年 | 115篇 |
2019年 | 129篇 |
2018年 | 191篇 |
2017年 | 225篇 |
2016年 | 253篇 |
2015年 | 184篇 |
2014年 | 167篇 |
2013年 | 1139篇 |
2012年 | 249篇 |
2011年 | 222篇 |
2010年 | 215篇 |
2009年 | 230篇 |
2008年 | 248篇 |
2007年 | 262篇 |
2006年 | 252篇 |
2005年 | 241篇 |
2004年 | 246篇 |
2003年 | 237篇 |
2002年 | 229篇 |
2001年 | 256篇 |
2000年 | 261篇 |
1999年 | 199篇 |
1998年 | 168篇 |
1997年 | 130篇 |
1996年 | 91篇 |
1995年 | 131篇 |
1994年 | 121篇 |
1993年 | 118篇 |
1992年 | 162篇 |
1991年 | 145篇 |
1990年 | 157篇 |
1989年 | 147篇 |
1988年 | 144篇 |
1987年 | 160篇 |
1986年 | 160篇 |
1985年 | 172篇 |
1984年 | 128篇 |
1983年 | 128篇 |
1982年 | 103篇 |
1981年 | 98篇 |
1980年 | 82篇 |
1979年 | 88篇 |
1978年 | 91篇 |
1977年 | 66篇 |
1976年 | 60篇 |
1975年 | 68篇 |
1974年 | 83篇 |
1973年 | 82篇 |
1972年 | 57篇 |
1969年 | 58篇 |
排序方式: 共有9304条查询结果,搜索用时 15 毫秒
851.
852.
Debates about child custody following parental separation often have been framed in terms of a battle between the competing rights of different family members. In the United States, advocates of mothers’ rights square off against proponents of fathers’ rights, with each side claiming to truly represent children's rights. Of course, not all advocates lay claim to children's rights in contact and custody disputes merely as a tactical maneuver. Some experts believe that children are entitled to (and benefit from) their own, independent legal advocate in custody cases. In theory, at least, the position that children lay claim to a third set of independent rights is strongly held in Europe, more strongly than in many U.S. states, because of the adoption of United Nations Convention on the Rights of the Child in Europe, but not in the United States. In this article, we examine children's rights in custody disputes from a European perspective, particularly children's legal right to contact with their parents, as well as the children's right to be heard in custody and contact disputes. We find that, despite differences in legal theory, tradition, and family demographics, European countries ultimately face a familiar reality: Custody and contact disputes are, in reality, more about renegotiating family relationships than they are a matter of a mother's, father's, or child's rights. 相似文献
853.
Despite the burdens that students and institutions assume when underwriting educational careers, very little is known about
completion rates, risk factors, and successful strategies of criminology/criminal justice (CCJ) graduate programs. Consequently,
the present study tracks 287 master’s and 70 doctoral students who entered the Florida State University CCJ program during
the 1991–2000 academic years. Almost two-thirds of this cohort earned an advanced degree. Younger students with higher GRE
scores were more likely to complete the master’s program. Successful doctoral degree recipients tended to have lower GRE scores,
be non-White, and earn their master’s degrees in-house. In terms of time-to-degree, it took over two years to earn an M.A.
and slightly more than six years to negotiate the Ph.D. Implications are explored for the program, the university, and the
discipline. 相似文献
854.
855.
Robert S. McLaren Martin G. Ensenberger Bruce Budowle Dawn Rabbach Patricia M. Fulmer Cindy J. Sprecher Joseph Bessetti Terri M. Sundquist Douglas R. Storts 《Forensic Science International: Genetics Supplement Series》2008,2(4):257-273
Several laboratories have reported the occurrence of a split or n − 1 peak at the vWA locus in PowerPlex® 16 and PowerPlex® ES amplification products separated on 4- and 16-capillary electrophoresis instruments. The root cause of this artifact is post-PCR reannealing of the unlabeled, unincorporated vWA primer to the 3′-end of the tetramethylrhodamine (TMR)-labeled strand of the vWA amplicon. This reannealing occurs in the capillary post-electrokinetic injection. The split peak is eliminated by incorporation into the loading cocktail of a sacrificial hybridization sequence (SHS) oligonucleotide that is complementary to the vWA primer. The SHS preferentially anneals to the primer instead of the TMR-labeled strand of the vWA amplicon. In addition, the n − 10/n − 18 artifact that may be seen at the vWA locus was determined to be due to double-stranded amplicon formed post-electrokinetic injection into the capillary. This was also eliminated by adding in two Complementary Oligo Targets (COT1 and COT2) in addition to the SHS oligonucleotide into the loading cocktail. These three oligonucleotides are complementary to the 33 bases at the 5′-end of the unlabeled vWA amplicon strand and the 60 bases at its 3′-end and therefore compete for hybridization to the TMR-labeled amplicon strand. Incorporation of these three oligonucleotides in the Internal Lane Standard 600 (ILS600) eliminate both the split peak and n − 10/n − 18 artifact in PowerPlex® 16 and PowerPlex® ES amplification products without affecting sizing of alleles at the vWA locus or any locus in the PowerPlex® 16, PowerPlex® Y, PowerPlex® ES, AmpFlSTR® Profiler Plus® ID, AmpFlSTR® Cofiler®, and AmpFlSTR® SGM Plus® kits. 相似文献
856.
Robert O. Work Author Vitae 《Orbis》2008,52(4):595-612
This article develops a framework for considering the future requirements for U.S. maritime power. It does so by proposing that these requirements must be considered within the context of an integrated National Fleet—the combined capabilities of the three “Sea Services”—the U.S. Navy, U.S. Marine Corps, and U.S. Coast Guard. It also would include their reserve components, as well as the Military Sealift Command (MSC) and the Maritime Administration's Ready Reserve Force (RRF)—the two organizations responsible for maintaining the nation's strategic sealift fleet. 相似文献
857.
858.
A case of fatal verapamil poisoning is reported. The pathologic and toxicologic findings are discussed. 相似文献
859.
Salvino Robert F. Randolph Gregory M. Turnbull Geoffrey K. Tasto Michael T. 《Public Choice》2019,181(3-4):191-213
Public Choice - It is well established in the literature that the number of interest group organizations varies across countries and states, with economic freedom and other institutional factors... 相似文献
860.
Taylor C. Boas F. Daniel Hidalgo Marcus Andr Melo 《American journal of political science》2019,63(2):385-400
We show that Brazilian voters strongly sanction malfeasant mayors when presented with hypothetical scenarios but take no action when given the same information about their own mayor. Partnering with the State Accounts Court of Pernambuco, we conducted a field experiment during the 2016 municipal elections in which the treatment group received information about official wrongdoing by their mayor. The treatment has no effect on self‐reported voting behavior after the election, yet when informing about malfeasance in the context of a vignette experiment, we are able to replicate the strong negative effect found in prior studies. We argue that voters' behavior in the abstract reflects the comparatively strong norm against corruption in Brazil. Yet on Election Day, their behavior is constrained by factors such as attitudes toward local political dynasties and the greater salience of more pressing concerns like employment and health services. 相似文献