全文获取类型
收费全文 | 816篇 |
免费 | 38篇 |
专业分类
各国政治 | 51篇 |
工人农民 | 133篇 |
世界政治 | 60篇 |
外交国际关系 | 37篇 |
法律 | 398篇 |
中国政治 | 8篇 |
政治理论 | 162篇 |
综合类 | 5篇 |
出版年
2023年 | 4篇 |
2022年 | 9篇 |
2021年 | 16篇 |
2020年 | 29篇 |
2019年 | 40篇 |
2018年 | 48篇 |
2017年 | 52篇 |
2016年 | 53篇 |
2015年 | 26篇 |
2014年 | 31篇 |
2013年 | 145篇 |
2012年 | 40篇 |
2011年 | 35篇 |
2010年 | 18篇 |
2009年 | 28篇 |
2008年 | 32篇 |
2007年 | 35篇 |
2006年 | 17篇 |
2005年 | 27篇 |
2004年 | 17篇 |
2003年 | 21篇 |
2002年 | 31篇 |
2001年 | 11篇 |
2000年 | 8篇 |
1999年 | 9篇 |
1998年 | 5篇 |
1997年 | 6篇 |
1996年 | 10篇 |
1995年 | 10篇 |
1994年 | 1篇 |
1993年 | 7篇 |
1992年 | 7篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有854条查询结果,搜索用时 15 毫秒
51.
The widespread use over the past two decades of Michigan's PA 198 Industrial Tax Abatement program provides an opportunity to assess the inter‐urban equity impacts of this economic development tool. Not only has PA 198 been used relatively more often by suburban municipalities, local governments at the metropolitan periphery are more likely to use abatements to attract new plants and new jobs. The older central cities primarily use the program to retain existing jobs, albeit at high cost of lost tax revenues. On balance, it appears that PA 198 has done little to alter the location decisions of participating firms. 相似文献
52.
53.
54.
Among the unforeseen problems of the new industrial age has been the disposal of increasing quantities of wastes—many hazardous and toxic. Industrial chemistry has produced numerous products that, while useful, are alien to nature and resistant to biodegradation or detoxification. Growing public awareness of the possible hazards and risks involved in disposal of the residuals of industrial activities is arousing a popular demand for environmental protection. But this popular awareness depends upon public information and a degree of scientific literacy—conditions which vary widely among nations. Initial consequences are environmental regulations and restrictions respecting waste disposal in scientifically developed countries, and vulnerability among less developed countries to the export of hazardous wastes from the countries of their origin. A secondary consequence is the emergence of international waste trade as a national and international multidimensional policy problem. 相似文献
55.
56.
57.
Laura A. Reese 《政策研究评论》1999,16(2):175-193
This research note examines two models of economic development policymaking. The literature on economic development and urban politics provides one image of reality regarding the factors associated with economic development policy in cities. When tested empirically, however, this model is found wanting. An alternative model is presented, identifying the complex set of factors associated with a single governmental policy, in this case, tax abatements. 相似文献
58.
Journal of Youth and Adolescence - 相似文献
59.
The Use of Laser Microdissection in Forensic Sexual Assault Casework: Pros and Cons Compared to Standard Methods 下载免费PDF全文
Sergio Costa M.Sc. Paulo Correia‐de‐Sá M.D. Ph.D. Maria J. Porto Ph.D. Laura Cainé Ph.D. 《Journal of forensic sciences》2017,62(4):998-1006
Sexual assault samples are among the most frequently analyzed in a forensic laboratory. These account for almost half of all samples processed routinely, and a large portion of these cases remain unsolved. These samples often pose problems to traditional analytic methods of identification because they consist most frequently of cell mixtures from at least two contributors: the victim (usually female) and the perpetrator (usually male). In this study, we propose the use of current preliminary testing for sperm detection in order to determine the chances of success when faced with samples which can be good candidates to undergo analysis with the laser microdissection technology. Also, we used laser microdissection technology to capture fluorescently stained cells of interest differentiated by gender. Collected materials were then used for DNA genotyping with commercially available amplification kits such as Minifiler, Identifiler Plus, NGM, and Y‐Filer. Both the methodology and the quality of the results were evaluated to assess the pros and cons of laser microdissection compared with standard methods. Overall, the combination of fluorescent staining combined with the Minifiler amplification kit provided the best results for autosomal markers, whereas the Y‐Filer kit returned the expected results regardless of the used method. 相似文献
60.