全文获取类型
收费全文 | 485篇 |
免费 | 25篇 |
专业分类
各国政治 | 27篇 |
工人农民 | 30篇 |
世界政治 | 52篇 |
外交国际关系 | 28篇 |
法律 | 185篇 |
中国政治 | 12篇 |
政治理论 | 172篇 |
综合类 | 4篇 |
出版年
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 13篇 |
2019年 | 15篇 |
2018年 | 18篇 |
2017年 | 22篇 |
2016年 | 32篇 |
2015年 | 22篇 |
2014年 | 11篇 |
2013年 | 76篇 |
2012年 | 6篇 |
2011年 | 16篇 |
2010年 | 19篇 |
2009年 | 8篇 |
2008年 | 17篇 |
2007年 | 17篇 |
2006年 | 19篇 |
2005年 | 9篇 |
2004年 | 4篇 |
2003年 | 12篇 |
2002年 | 11篇 |
2001年 | 11篇 |
2000年 | 4篇 |
1999年 | 4篇 |
1998年 | 6篇 |
1997年 | 7篇 |
1996年 | 6篇 |
1995年 | 5篇 |
1994年 | 6篇 |
1993年 | 9篇 |
1992年 | 6篇 |
1991年 | 7篇 |
1989年 | 5篇 |
1988年 | 5篇 |
1987年 | 4篇 |
1986年 | 6篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1981年 | 6篇 |
1980年 | 6篇 |
1976年 | 4篇 |
1975年 | 4篇 |
1973年 | 5篇 |
1972年 | 3篇 |
1971年 | 3篇 |
1969年 | 2篇 |
1968年 | 3篇 |
1967年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有510条查询结果,搜索用时 15 毫秒
91.
A wealth of scholarship generally finds that marriage protects against crime, but there is less consistent evidence for cohabitation. In this article, we contribute to scholarship on marriage and put forward new evidence about cohabitation by examining marital and cohabiting partnerships as transitions with distinct stages of entry, stability, and dissolution. We use within-person change models with contemporary data from the National Longitudinal Survey of Youth 1997 to analyze these stages for the full sample and separately for men and women. The findings show differential protective associations of marriage and cohabitation depending on the stage of the partnership. Both recently formed cohabiting partnerships and stable cohabiting partnerships are associated with reductions in the level of offending, although to a lesser degree than marital relationships. Cohabiting partnerships that are stable, in that they have lasted at least a year, are associated with larger decreases in offending, particularly among women. 相似文献
92.
Use of an Automated Nested Multiplex Respiratory Pathogen PCR Panel Postmortem in the Pediatric Forensic Setting
下载免费PDF全文
![点击此处可从《Journal of forensic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Tiffany Baker M.D. Ph.D. Cynthia Schandl M.D. Ph.D. Susan Erin Presnell M.D. James Madory D.O. Frederick S. Nolte Ph.D. Nicholas Batalis M.D. 《Journal of forensic sciences》2017,62(5):1223-1228
Respiratory pathogens have been detected in forensic investigations using multiple techniques; however, no study has examined the use of automated, nested, multiplex polymerase chain reaction (ANM‐PCR), commonly used in living patients, in the forensic setting. This retrospective study assessed the utility of ANM‐PCR in detecting respiratory pathogens in the pediatric forensic setting. Respiratory samples from 35 cases were tested for up to 20 respiratory pathogens. 51.4% of these cases yielded a positive ANM‐PCR result, 20% of which were considered the cause of or contributory to death. The most commonly detected pathogens were rhinovirus/enterovirus and respiratory syncytial virus, and these were the only pathogens determined to play a significant role in cause of death. The sampled sites and postmortem intervals tested did not affect the likelihood of a positive or negative test. ANM‐PCR panels are effective, affordable, and rapid ancillary tools in evaluating cause of death in the forensic pediatric population. 相似文献
93.
94.
Landor A Simons LG Simons RL Brody GH Gibbons FX 《Journal of youth and adolescence》2011,40(3):296-309
Research has documented a negative relationship between religion and risky sexual behavior. Few studies, however, have examined
the processes whereby religion exerts this effect. The present study develops and tests a model of various mechanisms whereby
parental religiosity reduces the likelihood of adolescents’ participation in risky sexual behavior (early sexual debut, multiple
sexual partners, and inconsistent condom use). Structural equation modeling, using longitudinal data from a sample of 612
African American adolescents (55% female), provided support for the model. The results indicated that parental religiosity
influenced adolescent risky sexual behavior through its impact on authoritative parenting, adolescent religiosity, and adolescent
affiliation with less sexually permissive peers. Some mediating mechanisms differed by the gender of the respondent, suggesting
a “double-standard” for daughters but not for sons. Findings also indicated the importance of messages about sexual behavior
that are transmitted to adolescents by their peers. Theoretical and policy implications of the findings are discussed. 相似文献
95.
Frederick M. Smith 《Journal of Indian Philosophy》2011,39(2):173-227
The Pu??iprav??hamary??d??bheda (PPM) by Vallabh??c??rya (1479?C1531?) is a brief work (25 verses) written in Sanskrit in about the year 1500, which is accompanied by four Sanskrit commentaries and one Hindi (Brajbh????) commentary. The most important and authoritative commentary is by Puru?ottama, written about two centuries after the original text. The article contains a translation of the PPM with long extracts from the commentaries, particularly the one composed by Puru?ottama. After an introduction placing the PPM??s doctrine of the hierarchy of embodied souls (j??vas) and their eligibility to obtain states of devotion (bhakti) in a wider context of Vai??ava sectarian and philosophical schools, the text is presented along with the translation and notes to the text (including extracts from the commentaries). The article concludes with reflections on the PPM??s doctrine of predestination, comparing it with those of other Indian religious sects and within the wider context of predestination in Western religions, where these discussions have been ongoing for more than 1500 years. An extensive bibliography is included at the end. 相似文献
96.
97.
Debates about the role of money in politics are commonplace. Although some critics point to the potentially negative impact
spending has in elections, most recent scholarly evidence indicates that spending may actually promote greater participation
in the political process. However, most of this research has uncovered this relationship in races for more visible offices;
few studies have focused on whether the same linkage is present in low-information elections. For a variety of reasons, it
is not altogether certain whether this relationship would exist for such offices. To test this proposition, we examine the
impact of campaign spending on voter rolloff in 172 contested races for intermediate appellate courts (IAC) between 2000 and
2008. In contrast to other types of elections, combined candidate spending in these races had no effect on ballot rolloff. 相似文献
98.
99.
Collins M Heagney A Cordaro F Odgers D Tarrant G Stewart S 《Journal of forensic sciences》2007,52(4):898-903
Five 44 gallon drums labeled as glycidyl methacrylate were seized by the Australian Customs Service and the Australian Federal Police at Port Botany, Sydney, Australia, in December 2004. Each drum contained a white, semisolid substance that was initially suspected to be 3,4-methylenedioxymethylamphetamine (MDMA). Gas chromatography-mass spectroscopy (GC/MS) analysis demonstrated that the material was neither glycidyl methacrylate nor MDMA. Because intelligence sources employed by federal agents indicated that this material was in some way connected to MDMA production, suspicion fell on the various MDMA precursor chemicals. Using a number of techniques including proton nuclear magnetic resonance spectroscopy ((1)H NMR), carbon nuclear magnetic resonance spectroscopy ((13)C NMR), GC/MS, infrared spectroscopy, and total synthesis, the unknown substance was eventually identified as methyl 3-[3',4'(methylenedioxy)phenyl]-2-methyl glycidate. The substance was also subjected to a published hydrolysis and decarboxylation procedure and gave a high yield of the MDMA precursor chemical, 3,4-methylenedioxyphenyl-2-propanone, thereby establishing this material as a "precursor to a precursor." 相似文献
100.