全文获取类型
收费全文 | 4992篇 |
免费 | 172篇 |
专业分类
各国政治 | 237篇 |
工人农民 | 186篇 |
世界政治 | 350篇 |
外交国际关系 | 145篇 |
法律 | 3104篇 |
中国共产党 | 1篇 |
中国政治 | 32篇 |
政治理论 | 1077篇 |
综合类 | 32篇 |
出版年
2020年 | 64篇 |
2019年 | 77篇 |
2018年 | 94篇 |
2017年 | 116篇 |
2016年 | 121篇 |
2015年 | 99篇 |
2014年 | 101篇 |
2013年 | 525篇 |
2012年 | 138篇 |
2011年 | 129篇 |
2010年 | 119篇 |
2009年 | 112篇 |
2008年 | 143篇 |
2007年 | 139篇 |
2006年 | 134篇 |
2005年 | 133篇 |
2004年 | 131篇 |
2003年 | 125篇 |
2002年 | 120篇 |
2001年 | 184篇 |
2000年 | 171篇 |
1999年 | 134篇 |
1998年 | 70篇 |
1997年 | 55篇 |
1996年 | 47篇 |
1995年 | 57篇 |
1994年 | 55篇 |
1993年 | 49篇 |
1992年 | 93篇 |
1991年 | 88篇 |
1990年 | 106篇 |
1989年 | 88篇 |
1988年 | 85篇 |
1987年 | 85篇 |
1986年 | 104篇 |
1985年 | 110篇 |
1984年 | 77篇 |
1983年 | 79篇 |
1982年 | 50篇 |
1981年 | 49篇 |
1980年 | 45篇 |
1979年 | 49篇 |
1978年 | 55篇 |
1976年 | 35篇 |
1975年 | 47篇 |
1974年 | 61篇 |
1973年 | 55篇 |
1972年 | 42篇 |
1970年 | 34篇 |
1969年 | 41篇 |
排序方式: 共有5164条查询结果,搜索用时 15 毫秒
191.
Walter F. Baber 《政策研究评论》1988,8(1):172-178
The advent of impact assessment as a tool of policy is the latest chapter in our understanding of the relationship between science and politics. As such, it presents at least two challenges to democratic politics. Given its emphasis on appropriate procedural character of conteniporary democratic systems. And by raising the value of technical and scientific information in environmental disputes, impact assessment poses a challenge to existing concepts of popular sovereignty, based as they are on interest and preference rather than knowledge. These challenges, however, do not rep- resent irreconcilable differences. Although there may be an inherent ten- sion between impact assessment and democratic politics, there are also areas of affinity between the two. And we are destined to accept and adapt to this tension because, in fact, understanding is one of our principal defenses against tyranny. 相似文献
192.
His research has included the use of census microdata to profile important but relatively unstudied sectors of the older population.
He has served as a reviewer of research proposals funded by the National Institute on Aging; and he is on the editorial boards
of the Journal of Gerontology, Research on Aging, Comprehensive Gerontology,and the Journal of Applied Gerontology. 相似文献
193.
194.
William F. Stine 《Public Choice》1988,58(1):35-44
The Laffer curve analysis suggests a possible policy conflict between short-run revenue maximization and long-run fiscal health. This paper estimates short-run and long-run property tax base elasticity in order to test whether such a conflict exists for the property tax in central cities. A stock adjustment model is used and separate time-series estimates for four New York State central cities lend empirical support to such a conflict. The results show that while disincentive effects associated with property tax rate increases are not strong enough to reduce proeprty tax revenue in the short-run, they are substantial enough to reduce long-run revenue in all but one city. The paper also tests for asymmetric response to property tax rate changes and finds significant results for only one city. 相似文献
195.
Douglas Cullinan Robert M. Schultz Michael H. Epstein Jerry F. Luebke 《Journal of youth and adolescence》1984,13(1):57-64
Adolescent girls aged 12 through 16 years, identified as either educable mentally retarded, behaviorally disordered, learning disabled, or nonhandicapped, were rated by their teachers on the Behavior Problem Checklist. Analysis of these ratings revealed significant differences for pupil category, Behavior Problem Checklist dimension, and category-by-dimension interaction. Behaviorally disordered students showed a greater degree of maladjustment than the retarded and nonhandicapped students on all four checklist dimensions, and exceeded the learning disabled on three dimensions (not Personality Problem). Implications for further research and special educational practices based on the present findings are discussed.Received Ed.D. from University of Virginia. Main interest is the handicapped adolescent.Received Ms.Ed. from Northern Illinois University. Main interest is emotionally disturbed children.Received Ed.D. from University of Virginia. Main interest is educational programming.Received Ms.Ed. from Northern Illinois University. Main interest is educational research. 相似文献
196.
This article describes a nationwide empirical study that will be undertaken during the next three years into the newly emerging phenomenon of genetic discrimination. In particular, the study aims to investigate the nature and extent of genetic discrimination in Australia across three key perspectives: consumers, third parties and the legal system. Further, the study aims to examine the social and legal implications of genetic discrimination, with a view to making recommendations for use in the Australian legal and policy context. It is anticipated that the data produced from this multifaceted investigation will assist in identifying areas where legal or other reforms are required. It will contribute significant baseline data for facilitating ongoing assessment of the nature and extent of the problem, as well as for longitudinal evaluation of the impact and effectiveness of any reforms which may be introduced in the future to address the issue. 相似文献
197.
198.
Comparing skeletal structures between antemortem and postmortem chest radiographs is widely used by forensic specialists from many disciplines to positively identify unknown decedents. However, validity assessments of this method have been fairly limited. This study had three objectives: 1) to quantify the reliability of ante- and postmortem chest radiograph comparison for decedent identification; 2) to identify useful radiologic features supporting decedent identification; and 3) to recognize sources of error in decedent identification related to use of comparative radiographs. A forensic pathologist, a forensic anthropologist, and two radiologists participated in the study. Our results showed that chest radiograph comparisons proved reliable, if basic decedent information was provided, and antemortem and postmortem radiographs were adequately positioned and exposed. A "morphological approach" using normal anatomical structures for comparison may provide the most efficient method for accurate identification. 相似文献
199.
200.
The authors describe three accidental deaths resulting from occupational hazards involving environmental gas alterations. One involved the displacement of oxygen caused by leakage of liquid nitrogen during the installation of a magnetic resonance imaging system. Two involved elevated environmental carbon dioxide concentrations: dry ice sublimation in a walk-in refrigerator in a research laboratory, and activation of a carbon dioxide fire alarm-extinguisher system by a woman locked in a bank vault. The autopsy findings, scene investigations, and certifications of these deaths, as related to the mechanisms of death, are discussed. 相似文献