全文获取类型
收费全文 | 113篇 |
免费 | 7篇 |
专业分类
各国政治 | 5篇 |
工人农民 | 16篇 |
世界政治 | 6篇 |
外交国际关系 | 7篇 |
法律 | 62篇 |
中国共产党 | 1篇 |
中国政治 | 2篇 |
政治理论 | 20篇 |
综合类 | 1篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 4篇 |
2019年 | 4篇 |
2018年 | 1篇 |
2017年 | 4篇 |
2016年 | 8篇 |
2015年 | 6篇 |
2014年 | 7篇 |
2013年 | 10篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 6篇 |
2009年 | 2篇 |
2008年 | 7篇 |
2007年 | 5篇 |
2006年 | 9篇 |
2005年 | 2篇 |
2004年 | 7篇 |
2003年 | 3篇 |
2002年 | 1篇 |
2001年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1981年 | 2篇 |
1977年 | 3篇 |
1973年 | 1篇 |
排序方式: 共有120条查询结果,搜索用时 109 毫秒
31.
32.
Federalism has been discussed as a potential system of governance in many countries, but in some it has failed to take shape. This has been the case in Nepal and, to a certain extent, in Italy. In fact, in Italy the federal option was rejected at the time of Risorgimento, and constitutional reforms in the 2000s never transformed the country into a federation as desired by political actors such as the Northern League despite some decentralization. In Nepal, the 2007 interim constitution specified that the country would be federal, but the first Constituent Assembly elected to write a new constitution was unable to produce a federal map acceptable to the major political parties and the second is wrestling with the same issue. In both cases, federal structuring was attacked by political actors who argued that it could promote disunity, undermine solidarity, and possibly lead to disintegration. This article argues that the idea of federalism held by prominent political actors as promoting division and conflict played strongly against its implementation. 相似文献
33.
Moreno LI Tate CM Knott EL McDaniel JE Rogers SS Koons BW Kavlick MF Craig RL Robertson JM 《Journal of forensic sciences》2012,57(4):1051-1058
The potential application of mRNA for the identification of biological fluids using molecular techniques has been a recent development in forensic serology. Constitutively expressed housekeeping genes can assess the amount of mRNA recovered from a sample, establish its suitability for downstream applications, and provide a reference point to corroborate the identity of the fluid. qPCR was utilized to compare the expression levels of housekeeping genes from forensic-like body fluid stains to establish the most appropriate assessment of human mRNA quantity prior to profiling. Although variability was observed between fluids and individuals, results indicated that beta-2 microglobulin exhibited the highest expression for all body fluids examined and across donors. A one-way analysis of variance was performed for housekeeping gene variability between donors (at the α, 0.05, significance level), and the results indicated significant differences for semen, vaginal secretions, and menstrual blood. 相似文献
34.
Strano-Rossi S Castrignanò E Anzillotti L Serpelloni G Mollica R Tagliaro F Pascali JP di Stefano D Sgalla R Chiarotti M 《Forensic science international》2012,221(1-3):70-76
New Italian legislation on driving under the influence of drugs considers oral fluid (OF) as a possible alternative drug testing matrix. On this basis, the present research was carried out to evaluate the applicability of four commercial on-site OF drug screening devices, namely DDS(?), Drugtest 5000(?), Drugwipe 5+(?) and RapidSTAT(?), in a real operative context. Preliminarily trained police officers tested randomly stopped drivers with two different kits side-by-side during roadside patrols. A central laboratory confirmed on-site kits' results by UHPLC-MS/MS analysis of the saliva specimen remaining after the screening analysis. 1025 drivers were submitted to the OF tests: 11.6% were positive for cocaine and metabolites, 11.1% for THC, 6% for amphetamines and amphetamine-type designer drugs and 2.3% for ketamine. The sensitivities of the kits were 81% (RapidSTAT(?)), 82% (DDS(?)), 90% (Drugwipe 5+(?)) and 97% (Drugtest 5000(?)) for cocaine and 38% (DDS(?)), 47% (Drugwipe 5+(?)), 72% (RapidSTAT(?)) and 92% (Drugtest 5000(?)) for THC. Drugtest 5000 was the only kit showing an acceptable sensitivity for on-site application. Only Drugtest 5000(?) and RapidSTAT(?) could be evaluated for amphetamines and methamphetamines: Drugtest 5000(?) showed a sensitivity of 100% in the case of amphetamines and 86% for methamphetamines, while RapidSTAT(?) 90% and 76% respectively. Nowadays, ketamine is not included in the target analytes of any on-site devices, but it was systematically included in the UHPLC-MS/MS confirmatory analysis. To ensure adequate reliability, MS confirmation of on-site OF screening tests is anyway always necessary, due to the presence of a significant number of false positive results even when using the commercial kit with the best performance. 相似文献
35.
Erika Weinthal 《政策研究评论》2011,28(6):635-638
36.
37.
38.
Galaif Elisha R. Chou Chih-Ping Sussman Steve Dent Clyde W. 《Journal of youth and adolescence》1998,27(3):275-299
This study examines the structural relationships among depression, suicidal ideation, gateway substance use (including cigarettes, alcohol, and marijuana), and hard substance use (including cocaine, stimulants, and inhalants) in a sample of continuation high school students at high risk for drug abuse. When the model was examined separately by ethnic group (Latino and Caucasian) and gender, significant differences among the factor correlations emerged. Compared to Latinos and females, Caucasians and males, respectively, demonstrated a greater number of significant relationships among the factors. For Latinos and females, only the depression and suicidal ideation factors were significantly correlated with each other, as were the gateway and hard substance use factors. For Caucasians and males, four of the six factors were significantly intercorrelated. One implication is that mood enhancement may be a particularly important reason for hard substance use among Caucasian and male adolescents. 相似文献
39.
Galaif Elisha R. Sussman Steve Chou Chih-Ping Wills Thomas A. 《Journal of youth and adolescence》2003,32(4):243-258
The structural relationships among risk and protective factors were examined in a sample of 646 continuation high school students. Although depression predicted more perceived stress, it was not a unique predictor of anger coping, seeking social support, or substance use. Perceived stress increased seeking social support. Seeking social support decreased the utilization of anger coping, which suggests that it may be a means of prevention for adolescents. Anger coping behaviors were implicated as being significant in sustaining depression and perceived stress, and in increasing hard drug use over time. Moderation analysis indicated that although there was no difference in the stress–coping–depression relationship between Latinos and Caucasians, the relationship among perceived stress, anger coping, and depression was stronger for female than for male adolescents. Theoretical and practical implications of the findings are discussed. 相似文献
40.
Nadia Rania Laura Migliorini Erika Sclavo Paola Cardinali Antonella Lotti 《Child & Youth Services》2013,34(4):292-315
The migration experience is normally associated with acculturative stress; this condition assumes relevance when the migrant is a minor alone. The aim of this study was to explore perceptions about the migration process and educational interventions offered by host-community social workers. We conducted semi-structured interviews with 10 unaccompanied migrant adolescents that had finished their educational pathways in the traditional community centers. Interview results were analyzed using NVivo 9, based on the grounded theory. The main results of the study are related to the incompatibility between the educational intervention of host communities and minors’ projects and motivations. 相似文献