全文获取类型
收费全文 | 2847篇 |
免费 | 125篇 |
专业分类
各国政治 | 210篇 |
工人农民 | 116篇 |
世界政治 | 179篇 |
外交国际关系 | 132篇 |
法律 | 1752篇 |
中国政治 | 16篇 |
政治理论 | 551篇 |
综合类 | 16篇 |
出版年
2023年 | 15篇 |
2022年 | 15篇 |
2021年 | 21篇 |
2020年 | 50篇 |
2019年 | 64篇 |
2018年 | 91篇 |
2017年 | 114篇 |
2016年 | 106篇 |
2015年 | 66篇 |
2014年 | 75篇 |
2013年 | 385篇 |
2012年 | 81篇 |
2011年 | 101篇 |
2010年 | 71篇 |
2009年 | 76篇 |
2008年 | 90篇 |
2007年 | 93篇 |
2006年 | 93篇 |
2005年 | 85篇 |
2004年 | 75篇 |
2003年 | 95篇 |
2002年 | 68篇 |
2001年 | 80篇 |
2000年 | 72篇 |
1999年 | 63篇 |
1998年 | 28篇 |
1997年 | 27篇 |
1996年 | 30篇 |
1995年 | 16篇 |
1994年 | 22篇 |
1993年 | 18篇 |
1992年 | 40篇 |
1991年 | 45篇 |
1990年 | 51篇 |
1989年 | 49篇 |
1988年 | 42篇 |
1987年 | 30篇 |
1986年 | 45篇 |
1985年 | 42篇 |
1984年 | 27篇 |
1983年 | 25篇 |
1982年 | 23篇 |
1981年 | 24篇 |
1980年 | 19篇 |
1979年 | 23篇 |
1978年 | 23篇 |
1977年 | 17篇 |
1971年 | 19篇 |
1970年 | 18篇 |
1968年 | 18篇 |
排序方式: 共有2972条查询结果,搜索用时 15 毫秒
991.
992.
Possible use of monoclonal antibodies anti-H in absorption-elution reaction was studied. Blood and secretion stains on gauze were analysed. Practical usefulness of monoclonal antibodies anti-H for investigation of human blood and secretions was stated. Differences in interaction of monoclonal antibodies with traces of different origin were found. 相似文献
993.
Scott D. MacDonald 《环境索赔杂志》2008,20(1):54-61
Environmental risks have earned a reputation for undermining a wide range of business activities. Given the tremendous potential for unanticipated environmental losses, multitiered claims and high-priced litigation, environmental risks have prompted organizations to seek protection through a variety of risk transfer methods. The insurance community has in turn responded with the creation of a progressive menu of project-specific and entity-specific environmental insurance products that can help provide financial security to those organizations exposed to real or perceived environmental risks. What are these products and how do they work? The following mock claim analysis (MCA) highlights some of the risk issues and the insurance solutions. 相似文献
994.
Faced with evidence of an appallingly low standard of living which the vast majority of men and women in Nigeria have despite two decades of development and cooperative movements, the Federal and State Governments now attempt to ensure that the real target of development are the human beings who will remain central to all redefinitions and to all revised strategies. This study proposes a theoretical framework for cooperative education and training programmes in the rural areas of Nigeria in order to raise the level of understanding and performance of cooperative members. The approach is primarily an amalgam of the general process model of organization systems and McGrath's problem - based/problem - solving systems. Application of the approach subsequently suggests a method of scientific inquiry which this paper conceives as the Cooperative Education Working Model. To be most effective, Nigerian cooperators must regard cooperative education and training as a vital benefit which their membership provides for them. 相似文献
995.
996.
997.
A 19-year-old drug-dependent man tried to commit suicide by intravenous self-injection of 5 ml concentrated mercury II chloride solution. He arrived at an intensive-care unit 2 h later with predominantly gastrointestinal symptoms and died 70 h later, despite hemodialysis and antidote therapy. The pathologic-anatomical picture was dominated by severe acute sublimate nephrosis and a coagulation disorder. The highest Hg content was found in the kidneys (5.69 mg%); in the gastrointestinal tract the Hg concentration lay between 1.12 and 3.26 mg%. 相似文献
998.
A cocaine body packer with normal abdominal plain radiograms. Value of drug detection in urine and contrast study of the bowel 总被引:2,自引:0,他引:2
R Gherardi B Marc X Alberti F Baud O Diamant-Berger 《The American journal of forensic medicine and pathology》1990,11(2):154-157
Drug packets are usually detected by ordinary abdominal radiographs, which is of major importance in the apprehension and prosecution of drug body packers, but false negatives may occur. We report the case of a cocaine body packer who had used the prograde route and in whom the initial abdominal plain films were normal. The diagnosis of cocaine body packing was assessed by seldom-described complementary methods of detection, including drug detection in the urine and contrast study of the bowel. 相似文献
999.
Sudden unexpected deaths form a large population of medical examiner caseloads. Presented are the clinical, pathologic, and virulence features of sudden death due to Group A beta-hemolytic streptococcus. Emphasis is placed on the importance of post-mortem cultures. Case histories are included to illustrate the sometimes unusual presentation of this disease. Recent publicity has led to a heightened public awareness of this unusually virulent entity. 相似文献
1000.
Transfer (or waiver) of juveniles to criminal court is one of the most extreme responses to serious youth crime. Although many states have recently revised their transfer statutes, and the number of juveniles prosecuted as adults increases each year, little research has been conducted to assess the correctional experiences of delinquent youth convicted in criminal court and sentenced to adult prison. Evaluations of such experiences are important to policymakers and juvenile justice officials who are considering juvenile transfers as a strategy for securing longer and harsher confinement for offenders. Based on interviews with 59 chronic juvenile offenders placed in state training schools, and 81 comparable youths sentenced to adult correctional facilities, this article presents a comparison of offenders' perceptions of their correctional experiences. Juveniles incarcerated in training schools give more positive evaluations of treatment and training programs, general services, and institutional personnel than do those youths in prison. Juveniles housed in institutions which emphasize security over treatment — i.e., prisons — are more often victimized during their confinement than youths in the treatment-oriented training schools. Once placed in prisons, adolescent inmates are more likely to be victims of prison violence and crime from both inmates and staff. These research results suggest some paradoxical effects of the treatment-custody distinction implicit in judicial waiver practices. The differential socialization into crime and violence for youths in adult prisons may increase the risks of having these types of behavior repeated by transferred youths once released. 相似文献