全文获取类型
收费全文 | 10590篇 |
免费 | 384篇 |
专业分类
各国政治 | 566篇 |
工人农民 | 332篇 |
世界政治 | 900篇 |
外交国际关系 | 513篇 |
法律 | 5611篇 |
中国共产党 | 2篇 |
中国政治 | 80篇 |
政治理论 | 2844篇 |
综合类 | 126篇 |
出版年
2020年 | 129篇 |
2019年 | 172篇 |
2018年 | 251篇 |
2017年 | 262篇 |
2016年 | 262篇 |
2015年 | 184篇 |
2014年 | 212篇 |
2013年 | 1380篇 |
2012年 | 230篇 |
2011年 | 285篇 |
2010年 | 262篇 |
2009年 | 283篇 |
2008年 | 291篇 |
2007年 | 266篇 |
2006年 | 305篇 |
2005年 | 278篇 |
2004年 | 258篇 |
2003年 | 262篇 |
2002年 | 270篇 |
2001年 | 291篇 |
2000年 | 263篇 |
1999年 | 220篇 |
1998年 | 156篇 |
1997年 | 153篇 |
1996年 | 109篇 |
1995年 | 130篇 |
1994年 | 132篇 |
1993年 | 141篇 |
1992年 | 164篇 |
1991年 | 204篇 |
1990年 | 171篇 |
1989年 | 201篇 |
1988年 | 158篇 |
1987年 | 187篇 |
1986年 | 187篇 |
1985年 | 189篇 |
1984年 | 171篇 |
1983年 | 179篇 |
1982年 | 141篇 |
1981年 | 146篇 |
1980年 | 126篇 |
1979年 | 132篇 |
1978年 | 108篇 |
1977年 | 80篇 |
1976年 | 94篇 |
1975年 | 80篇 |
1974年 | 86篇 |
1973年 | 88篇 |
1972年 | 70篇 |
1969年 | 71篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
952.
Sandra M. Stith Narkia M. Green Douglas B. Smith David B. Ward 《Journal of family violence》2008,23(3):149-160
A meta-analysis investigating the relationship between marital satisfaction/discord and intimate partner violence (IPV) in
heterosexual relationships was conducted with 32 articles. Overall, a small-to-moderate effect size (r = −0.27) indicated a significant and negative relationship existed between marital satisfaction/discord and IPV. Moderator
analyses found no differences between effect size based on construct examined (discord or satisfaction). However, the magnitudes
of observed effect sizes were influenced by other moderator variables, including the use of standardized versus non-standardized
measures, gender of the offender and victim, role in the violence (perpetrator versus victim), and sample type (clinical versus
community). The data suggests that gender is an especially important moderator variable in understanding the relationship
between marital satisfaction/discord and IPV. 相似文献
953.
954.
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
955.
956.
957.
958.
Dr. Jeffreys writes to say that he would be interested to hearof any other tribe whose name is a sobriquet for "wanderer"or "stranger". He has not dealt with Southern Africa, and wewould therefore suggest Angoni. Any reader who can add to thelist may care to get into touch with the writer of this articleat Bamenda, British Cameroons. 相似文献
959.
960.