全文获取类型
收费全文 | 4733篇 |
免费 | 285篇 |
国内免费 | 1篇 |
专业分类
各国政治 | 352篇 |
工人农民 | 14篇 |
世界政治 | 601篇 |
外交国际关系 | 803篇 |
法律 | 1745篇 |
中国共产党 | 306篇 |
中国政治 | 554篇 |
政治理论 | 289篇 |
综合类 | 355篇 |
出版年
2023年 | 28篇 |
2022年 | 30篇 |
2021年 | 24篇 |
2020年 | 30篇 |
2019年 | 40篇 |
2018年 | 51篇 |
2016年 | 33篇 |
2015年 | 36篇 |
2014年 | 165篇 |
2013年 | 116篇 |
2012年 | 272篇 |
2011年 | 296篇 |
2010年 | 184篇 |
2009年 | 150篇 |
2008年 | 187篇 |
2007年 | 226篇 |
2006年 | 248篇 |
2005年 | 206篇 |
2004年 | 188篇 |
2003年 | 210篇 |
2002年 | 182篇 |
2001年 | 153篇 |
2000年 | 135篇 |
1999年 | 96篇 |
1998年 | 80篇 |
1997年 | 84篇 |
1996年 | 69篇 |
1995年 | 90篇 |
1994年 | 87篇 |
1993年 | 54篇 |
1992年 | 56篇 |
1991年 | 63篇 |
1990年 | 56篇 |
1989年 | 62篇 |
1988年 | 96篇 |
1987年 | 82篇 |
1986年 | 81篇 |
1985年 | 90篇 |
1984年 | 92篇 |
1983年 | 87篇 |
1982年 | 61篇 |
1981年 | 61篇 |
1980年 | 76篇 |
1979年 | 38篇 |
1976年 | 34篇 |
1964年 | 26篇 |
1962年 | 17篇 |
1961年 | 14篇 |
1959年 | 16篇 |
1957年 | 17篇 |
排序方式: 共有5019条查询结果,搜索用时 0 毫秒
821.
Margolin G 《Journal of interpersonal violence》2005,20(1):72-81
Identifying mechanisms that explain the children's differential vulnerability to violence exposure is an important research focus. Developmentally sensitive theories and methods are recommended to better understand children's risk and resilience to violence exposure. Examples are provided of promising research that links violence exposure to subtle deviations in children's emotional, cognitive, and physiological functioning, and to disruptions in the family environment. 相似文献
822.
823.
Despite near unanimous global opposition to human reproductive cloning, the United Nations has been unable to reach a consensus as to how cloning practices should be regulated at the international level. As a result, the U.N. objective of establishing binding international regulations governing cloning and stem cell research has yet to be achieved. Given the lack of consensus that exists within the global community on this topic, it seems that any attempt to harmonize the international regulation of cloning and stem cell science will face important obstacles. This paper seeks to illuminate the particular challenges to harmonizing international laws and policies related to stem cell research and human cloning, and to investigate potential methods for overcoming these challenges. By drawing on two other areas in which regulatory harmonization has been attempted, namely: environmental and human safety aspects of international trade, and pharmaceutical research and development, we study approaches to global regulatory harmonization. We conclude that while the challenges to harmonization are diverse and important, so too are the benefits of establishing uniformity in approaches to stem cell research worldwide. This paper proposes a model for harmonizing the regulation of stem cell research that focuses on broader norms and principles rather than specific rules. It further recommends that such harmonization should occur through a process initiated and developed by an independent international agency marked by diversity, both in terms of the cultural identities and perspectives represented, and the interdisciplinary expertise of its members. 相似文献
824.
Marshall WL Ward T Mann RE Moulden H Fernandez YM Serran G Marshall LE 《Journal of interpersonal violence》2005,20(9):1096-1114
In this article, the authors draw on literatures outside sexual offending and make suggestions for working more positively and constructively with these offenders. Although the management of risk is a necessary feature of treatment, it needs to occur in conjunction with a strength-based approach. An exclusive focus on risk can lead to overly confrontational therapeutic encounters, a lack of rapport between offenders and clinicians, and fragmented and mechanistic treatment delivery. The authors suggest that the goals of sexual offender treatment should be the attainment of good lives, which is achieved by enhancing hope, increasing self-esteem, developing approach goals, and working collaboratively with the offenders. Examples are provided of how these targets may be met. When this is done within a therapeutic context where the treatment providers display empathy and warmth and are rewarding and directive, the authors suggest that treatment effects will be maximized. 相似文献
825.
826.
Di Nunno N Saponetti SS Scattarella V Emanuel P Baldassarra SL Volpe G Di Nunno C 《The American journal of forensic medicine and pathology》2007,28(4):333-341
In the archeological site of the early Christian Episcopal complex of Saint Peter, in Canosa di Puglia (Bari, Italy), during the operations of archaeological excavations, tombs were discovered. They were dated between the sixth and seventh centuries ad with carbon 14 methodology. Five skeletons were found in the 5 tombs: 28A: male individual, 43 years old. The height was 170 cm; the biomass was 65.7 kg. The analysis of the bones indicated several noteworthy pathologies, such as a number of hypoplasia lines of the enamel, the presence of Schmorl hernias on the first 2 lumbar vertebrae, and the outcome of subacromial impingement syndrome. 28E was a male individual, with a biologic age of death of between 44 and 60 years. The height was 177 cm. He had a posttraumatic fracture callus of the medial third of the clavicle, with an oblique fracture rima. 29B was a female individual, 44-49 years old. The height was 158.8 cm; the biomass was 64.8 kg. There was Wells bursitis on the ischial tuberosity on both sides. 29E was a male individual, 45-50 years old. The height was 169.47 cm; the biomass was 70.8 kg. The third and the fourth vertebrae showed Baastrup syndrome (compression of the vertebral spine). There were radiologic signs of deformity on the higher edge of the acetabula and results of frequent sprains of the ankles. 31A was a male individual, 47-54 years old. The height was 178.65 cm; the biomass was 81 kg. The vertebral index showed a heavy overloading in the thoracic lumbar region. There were bony formations under the periosteum on both on the higher and medium facets of the first metatarsus and on the higher and lateral facets of the fifth metatarsus on both sides. As the topography indicates, these small ossifications coincided with the contact points between the back of the foot and parts of the upper shoe. From the osseous remains, in particular from the teeth (central incisors), the DNA was extracted and typed to identify potential family ties among all the subjects. The extraction technique used came from the DNA Promega technique, partially modified by the authors. Stay times of the sample in the extraction buffer were increased and were increased the polymerase chain reaction (PCR) cycles. 相似文献
827.
Thangaraj K Chaubey G Reddy AG Singh VK Singh L 《Forensic science international》2007,169(2-3):247-251
We have analyzed nine autosomal STR loci (D3S1358, vWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, and D7S820) in 97 samples of enigmatic Andaman islanders including: 15 Great Andamanese, 46 Onge and 36 Nicobarese. Data was compared with the available data on Indian and South East Asian populations. Heterozygosity (H), power of discrimination (PD), probability exclusion (PE), typical paternity index (TPI), polymorphism information content (PIC), AMOVA and Arlequin analysis were carried out. Average heterozygosity observed was high and almost equal in all the populations. Similarly, PD, PE, TPI and PIC have been almost equal in all the populations. 相似文献
828.
Physical abuse in infancy can cause persistent neurological deficits. Although intracranial foreign bodies are generally secondary to penetrating trauma or surgical procedures, rarely they also occur as a result of child abuse. A 32-year-old man presented with the complaint of generalized tonic clonic seizures to the Neurology Department of Marmara, University Hospital. Computerized tomography (CT) scan revealed a sewing needle located within the temporal lobe. The location and the position of the needle suggested that it must have been introduced in infancy through the lamdoid suture before the closure of it, as an unsuccessful deliberate homicide attempt or accidental injury. 相似文献
829.
Rodríguez A Arrieta G Sanóu I Vargas MC García O Yurrebaso I Pérez JA Villalta M Espinoza M 《Forensic science international》2007,168(1):85-88
Allele frequencies for 18 STR autosomal loci (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, D7S820, D16S539, TH01, TPOX, CSF1PO, Penta D, Penta E, D19S433, D2S1338 and SE33) were obtained from a sample of 191-500 unrelated individuals from Costa Rica, Central America. 相似文献
830.