全文获取类型
收费全文 | 11632篇 |
免费 | 276篇 |
专业分类
各国政治 | 474篇 |
工人农民 | 918篇 |
世界政治 | 542篇 |
外交国际关系 | 357篇 |
法律 | 7178篇 |
中国共产党 | 3篇 |
中国政治 | 58篇 |
政治理论 | 2302篇 |
综合类 | 76篇 |
出版年
2020年 | 108篇 |
2019年 | 145篇 |
2018年 | 591篇 |
2017年 | 617篇 |
2016年 | 509篇 |
2015年 | 165篇 |
2014年 | 157篇 |
2013年 | 968篇 |
2012年 | 309篇 |
2011年 | 557篇 |
2010年 | 581篇 |
2009年 | 449篇 |
2008年 | 518篇 |
2007年 | 488篇 |
2006年 | 257篇 |
2005年 | 242篇 |
2004年 | 262篇 |
2003年 | 229篇 |
2002年 | 219篇 |
2001年 | 266篇 |
2000年 | 267篇 |
1999年 | 193篇 |
1998年 | 120篇 |
1997年 | 126篇 |
1996年 | 120篇 |
1995年 | 121篇 |
1994年 | 110篇 |
1993年 | 112篇 |
1992年 | 184篇 |
1991年 | 200篇 |
1990年 | 180篇 |
1989年 | 181篇 |
1988年 | 162篇 |
1987年 | 180篇 |
1986年 | 176篇 |
1985年 | 164篇 |
1984年 | 163篇 |
1983年 | 173篇 |
1982年 | 99篇 |
1981年 | 91篇 |
1980年 | 77篇 |
1979年 | 112篇 |
1978年 | 78篇 |
1977年 | 79篇 |
1976年 | 60篇 |
1975年 | 59篇 |
1974年 | 63篇 |
1973年 | 73篇 |
1972年 | 63篇 |
1968年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Maria T. Brouwer 《European Journal of Law and Economics》2008,26(1):11-26
Horizontal mergers can be challenged by anti trust authorities under both the US and EU Horizontal Merger Guidelines. More
horizontal mergers are unconditionally approved in the US than in the EU. EU merger policy toughened after 1998 but became
more in line with US practices after 2004. Differences in merger policies between the US and the EU can be explained by a
greater scope of the efficiency argument in the US. The paper argues that firms only want to merge in oligopoly, if they expect
to realize substantial merger specific efficiency gains, which counterbalances the price increasing effect of merger.
相似文献
992.
This address by the chairman of the Anglo-Ethiopian Societywas given at a joint meeting of the Royal African Society, theRoyal Commonwealth Society and the Anglo-Ethiopian Society onMay 3, 1962. Lt.-Col. Neil McLean, D.S.O., M.P., took the chair 相似文献
993.
Despite the call to address domestic violence along with child maltreatment, little information exists to guide services for
victimized women involved with child welfare. Research shows that victimized women contend with multiple problems stemming
from violent victimization. Unfortunately less is known about combinations of needs and resources among victimized women,
especially for those involved with child welfare. Through an examination of needs and resources among families with child
maltreatment and domestic violence, we aimed to help address this knowledge gap. Needs and resources among 1,229 victimized
caregivers were examined using the National Survey of Child and Adolescent Well-being (NSCAW). Using latent class analysis,
four distinct multivariate profiles of needs and resources among victimized caregivers were identified. Significant differences
were found among the profile groups in the family violence they experienced in the 18 months following child welfare investigations.
Based on these findings, we discuss implications for tailored practices to enhance the safety of victimized caregivers involved
with child welfare.
An earlier version of this paper was presented at the 9th Annual Conference of the Society for Social Work and Research, Miami,
Florida in January 2005. 相似文献
994.
995.
996.
997.
998.
In 16 medical examiner's cases, which were found to be barbiturate-positive by thin-layer chromatographic screening of the liver, blood barbiturate concentrations were determined by gas chromatography. The corresponding vitreous humor samples were screened by the enzyme multiplied immunoassay technique, the EMIT-st serum barbiturate assay. By using the recommended dilution for detecting serum barbiturates, it was possible to detect barbiturates in vitreous humor at a toxic concentration. By using one fourth the amount of diluent, the barbiturates could be detected also at a therapeutic concentration. The EMIT-st assay proved to be useful in the screening for barbiturates in vitreous humor, a material that is readily available in forensic toxicology. 相似文献
999.
1000.
Research into community corrections officers’ perceptions of the needs of ex-offenders has largely been overlooked. While
some empirical research has emerged regarding federal parole officers’ perceptions, it is conceptually incomplete. A gap in
the literature remains regarding the concordance or discordance between offenders and community corrections officers’ perceptions
of offender needs and the opportunities for success upon release. Using a sample of community corrections officers in Seattle,
Washington, this research examined officer perception of ex-offender needs, the value officers’ placed on the specific needs,
and the opportunities available for offenders to meet their needs. Differences between officers emerged including the finding
that female officers rated needs and challenges for offenders significantly different than male officers. Policy implications
of the research are discussed.
This research was made possible due to a grant award from the College of Arts and Sciences at Seattle University. This research
was first presented at the 2005 Academy of Criminal Justice Sciences Conference in Chicago. We are grateful to Mac Pevey and
Keven Bovenkamp from the Washington State Department of Corrections and Bill Corn and Tim McTighe from United States Probation
and Pretrial Services for their support, assistance, and for making the study possible. A special thanks to our research assistant
Tania Reyes who was instrumental in collecting the data for this investigation. 相似文献