全文获取类型
收费全文 | 784篇 |
免费 | 33篇 |
专业分类
各国政治 | 93篇 |
工人农民 | 38篇 |
世界政治 | 57篇 |
外交国际关系 | 66篇 |
法律 | 355篇 |
中国共产党 | 7篇 |
中国政治 | 79篇 |
政治理论 | 82篇 |
综合类 | 40篇 |
出版年
2023年 | 6篇 |
2022年 | 7篇 |
2021年 | 16篇 |
2020年 | 23篇 |
2019年 | 25篇 |
2018年 | 32篇 |
2017年 | 35篇 |
2016年 | 28篇 |
2015年 | 31篇 |
2014年 | 33篇 |
2013年 | 79篇 |
2012年 | 61篇 |
2011年 | 79篇 |
2010年 | 27篇 |
2009年 | 21篇 |
2008年 | 42篇 |
2007年 | 28篇 |
2006年 | 28篇 |
2005年 | 32篇 |
2004年 | 44篇 |
2003年 | 43篇 |
2002年 | 30篇 |
2001年 | 16篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1997年 | 9篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1967年 | 2篇 |
1959年 | 1篇 |
排序方式: 共有817条查询结果,搜索用时 31 毫秒
201.
Liene Ozoliņa 《Journal of Baltic studies》2019,50(4):515-531
ABSTRACTLatvian austerity policy following the 2008 economic crisis has been touted as a success story by some and critiqued as a socially costly experiment by others. It has remained a puzzle, however, how such harsh socio-economy policies were possible without causing sustained popular protests. Drawing on ethnographic research at an unemployment office in Riga in the aftermath of the crisis, this article considers austerity as a political and moral phenomenon. I argue that welfare policies played an important role in disciplining the parts of the population most adversely affected by the crisis by framing post-crisis precarity as a matter of individual responsibility. Furthermore, this disciplining worked because it was underpinned by a particular moral discourse that I call ‘a discourse of freedom.’ Thus, this historically and culturally-shaped moral economy helped not only secure the implementation of post-crisis austerity in a way that yielded little sustained public resistance but also helped legitimate it. 相似文献
202.
203.
204.
Fernández-Rodríguez A Ballesteros S de Ory F Echevarría JE Alvarez-Lafuente R Vallejo G Gómez J 《Forensic science international》2006,161(1):8-14
Infections are considered to be an important cause of unexpected death in children. It has also been assumed that respiratory viruses are involved in the genesis of sudden infant death syndrome (SIDS). The Spanish National Institute of Toxicology and Forensic Sciences act as the forensic reference centre for Spain. We analyse the experience of this centre in the virological study of 64 cases of sudden children death where viral serology, virological cultures, herpesviruses polymerase chain reaction (PCR) and electron microscopy were performed. According to pathological findings, death could only be attributed to an adenovirus infection in one amygdalitis with upper airways stenosis and asphyxia. Human herpes virus 6 (HHV-6) was detected by PCR in one case with pathological findings characteristic of SIDS. Recent infection by respiratory syncytial virus (RSV), Epstein-Barr virus (EBV) and cytomegalovirus (CMV) were also detected. Meanwhile, 85.9% of the cases yielded negative viral results. Twenty-eight infants were finally categorised as SIDS. Pathological findings of infection were detected in 12 patients despite the negativity of viral analyses. Although viral infection is an uncommon cause of sudden children death, a complete microbiological investigation will help to solve the puzzle of SIDS. Definitive guidelines for microbiological analyses need to be updated whilst new pathogens are discovered or new techniques are implemented in order to clarify unsolved cases. 相似文献
205.
206.
Research on the very specific damage to single textile fibres caused by vapour cloud explosions is presented. Vapour cloud explosion experiments were carried out using a selection of 41 garments differing in colour, fibre composition and textile construction. Fibres subjected to a vapour cloud explosion become wider at the end, often taking the form of a ball, bulb or shovel, while the morphological structure of the remaining part of the fibre remains almost unchanged. The presented results can clearly indicate that an explosion took place at the scene of the crime. The authors would like to be able to provide investigators with specific information on how to link clothes (and thus people) to a specific type of crime. 相似文献
207.
Preparation of degraded human DNA under controlled conditions 总被引:7,自引:0,他引:7
DNA typing through analysis of short tandem repeats (STRs) and mitochondrial DNA (mtDNA) by means of the polymerase chain reaction (PCR) and sequencing are the common methods for the forensic identification of persons and reconstruction of kinship, especially when skeletal human remains have to be analyzed. Furthermore, samples typically found at crime scenes may be both quantitatively and qualitatively inadequate since they may contain very scarce and often degraded DNA due to exposure to heat, light, humidity, and microorganisms. In order to improve the performance of STR typing technology in those cases where DNA availability is limited, it would be desirable to have a source of degraded DNA with known properties. For this purpose, we have developed a method to prepare artificially degraded DNA under controlled conditions. By treatment of genomic DNA with sonication and DNAse I we have produced DNA fragments within a defined range of lengths. STR typing of this degraded DNA with a commercially available multiplex kit could only produce partial profiles as indicated by the absence of STR alleles with sizes >200 bp. This artificially degraded DNA can be used for the improvement and standardization of STR typing protocols when only highly degraded DNA is available for analysis. 相似文献
208.
Bezerra de Menezes LM Volpato MC Rosalen PL Cury JA 《Forensic science international》2003,137(2-3):209-214
The use of bone as a biomarker for chronic and acute exposure to fluoride salts has been suggested, but there are no data published about its use to evaluate lethal intoxication. One hundred and sixty rats were divided into eight groups that received a single oral intubation dose from 0 (control) to 90 mg F/kg as NaF. The animals' time of death was recorded and their femurs were removed for fluoride analysis. Acid-soluble fluoride was determined in the whole bone and on the surface (periosteal), using an ion specific electrode. The data showed a statistically significant relationship between fluoride dose and the number of deaths (P<0.0001). A statistically significant relationship was also found between fluoride dose and fluoride concentration ([F]) in either the whole femur (P<0.0017), on the surface (P<0.0001) or for the ratio periosteal [F]/whole [F] (P<0.0001). However, the [F] on the femur surface was more closely correlated with mortality than that in the whole bone, showing statistically significant differences among the lethal doses and control (P<0.05). The data suggest that the ratio [F] periosteal bone/[F] whole bone, is a biomarker for acute fluoride toxicity. 相似文献
209.
Sánchez-Diz P Gusmão L Beleza S Benítez-Páez A Castro A García O Solla LP Geada H Martín P Martínez-Jarreta B de Fátima Pinheiro M Raimondi E Silva de la Fuente SM Vide MC Whittle MR Zarrabeitia MT Carracedo A Amorim A;GEP-ISFG 《Forensic science international》2003,135(2):158-162
A collaborative exercise was carried out by the Spanish and Portuguese ISFG Working Group (GEP-ISFG) in order to evaluate the performance of two Y-chromosome STR PCR tetraplexes, which include the loci DYS461, GATA C4, DYS437 and DYS438 (GEPY I), and DYS460, GATA A10, GATA H4 and DYS439 (GEPY II). The participating laboratories were asked to type three samples for the eight markers, using a specific amplification protocol. In addition, two control samples, with known haplotypes, were provided. The results obtained by the 13 different participating laboratories were identical, except for two laboratories that failed to type correctly the same two samples for GATA C4. By sequence analyses, two different GATA C4 allele structures were found. One control sample (allele 21) and two questioned samples (allele 22, correctly typed by all the laboratories, and allele 25) presented the following repeat structure: (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)n, but different from the one found for allele 26 in one sample included in this exercise, as well as in the second control sample (allele 23), namely (TCTA)4(TGTA)2(TCTA)2(TGTA)2(TCTA)2(TGTA)2(TCTA)n. The collaborative exercise results proved that both Y-tetraplexes produce good amplification results, with the advantage of being efficiently typed using different separation and detection methodologies. However, since GATA C4 repeat presents a complex structure, with alleles differing in sequence structure, efficient denaturing conditions should be followed in order to avoid typing errors due to sizing problems. 相似文献
210.