全文获取类型
收费全文 | 17535篇 |
免费 | 1231篇 |
专业分类
各国政治 | 702篇 |
工人农民 | 885篇 |
世界政治 | 1143篇 |
外交国际关系 | 541篇 |
法律 | 12331篇 |
中国共产党 | 2篇 |
中国政治 | 107篇 |
政治理论 | 2963篇 |
综合类 | 92篇 |
出版年
2023年 | 77篇 |
2021年 | 90篇 |
2020年 | 436篇 |
2019年 | 454篇 |
2018年 | 575篇 |
2017年 | 588篇 |
2016年 | 670篇 |
2015年 | 514篇 |
2014年 | 545篇 |
2013年 | 1816篇 |
2012年 | 495篇 |
2011年 | 511篇 |
2010年 | 543篇 |
2009年 | 564篇 |
2008年 | 516篇 |
2007年 | 510篇 |
2006年 | 527篇 |
2005年 | 441篇 |
2004年 | 438篇 |
2003年 | 361篇 |
2002年 | 407篇 |
2001年 | 673篇 |
2000年 | 607篇 |
1999年 | 481篇 |
1998年 | 241篇 |
1997年 | 172篇 |
1996年 | 192篇 |
1995年 | 192篇 |
1994年 | 170篇 |
1993年 | 176篇 |
1992年 | 305篇 |
1991年 | 311篇 |
1990年 | 295篇 |
1989年 | 278篇 |
1988年 | 307篇 |
1987年 | 261篇 |
1986年 | 323篇 |
1985年 | 318篇 |
1984年 | 247篇 |
1983年 | 226篇 |
1982年 | 179篇 |
1981年 | 155篇 |
1980年 | 143篇 |
1979年 | 220篇 |
1978年 | 116篇 |
1977年 | 92篇 |
1975年 | 94篇 |
1974年 | 124篇 |
1973年 | 79篇 |
1972年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
K A Hewadikaram M L Goff 《The American journal of forensic medicine and pathology》1991,12(3):235-240
Decomposition studies were conducted using two carcasses of domestic pigs, Sus scrofa L., 8.4 kg and 15.1 kg in weight, to determine the effects of carcass size on the rate of decomposition, composition of the arthropod fauna, and succession patterns. A total of 46 arthropod taxa were recovered during this study. No size-related differences were observed between carcasses with respect to composition of the arthropod fauna or patterns of succession. A greater number of arthropods were observed attracted to the 15.1-kg carcass, and the rate of decomposition observed was more rapid for the 15.1-kg carcass than for the 8.4-kg carcass. Internal temperatures of the 8.4-kg carcass were more directly related to external ambient temperatures during the fresh and bloated stages of decomposition. During the decay stage, both carcasses generated internal temperatures significantly above ambient temperatures. Following this stage, internal temperatures fell to approximate ambient temperatures during the postdecay and remains stages. 相似文献
32.
The accountability of international development NGOs (INGOs) has attracted a great deal of interest from academics and development practitioners. INGO accountability falls into two categories: practical accountability (for the use of inputs, the way activities are performed, and outputs) and strategic accountability for INGOs' performance in relation to their mission. This article presents a conceptual framework for exploring INGO accountability. It is based on information collected through a literature review and semi-structured interviews with representatives from 20 UK-based INGOs. The research found that INGOs tend to use a number of quality-assurance mechanisms to achieve ‘practical’ accountability. However, it is suggested that this kind of accountability will not necessarily enable INGOs to achieve their missions to alleviate poverty and eliminate injustice. Furthermore, the predominant use of practical accountability has led to a number of gaps in INGO accountability. It is suggested that, like the term ‘participation’ before it, accountability has been co-opted for its instrumental benefits to INGO project performance and management. It is argued that if INGOs are to achieve their missions, this will require more ‘strategic’ forms of accountability, geared towards fundamentally changing those social, economic, and political structures that promote poverty. 相似文献
33.
34.
P. Gill C.H. Brenner J.S. Buckleton A. Carracedo M. Krawczak W.R. Mayr N. Morling M. Prinz P.M. Schneider B.S. Weir 《Forensic Science International Supplement Series》2006,160(2-3):90-101
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations. 相似文献
35.
36.
George M. Guess 《公共行政管理与发展》1991,11(6):573-589
The failure of forestry to contribute to poverty reduction in Central America is due to public policies which inhibit its profitability. Absence of public regulation of harvesting and competing subsidies to agriculture keep forestry stumpage prices artificially low. This encourages destruction of the forest resource, which damages both the environment and the potential to reduce poverty. A comparison of Costa Rica and Honduras reveals two dissimilar approaches toward forest policy. While Costa Rica attempts to raise producer and grower stumpage prices by tax credits, soft loans and differential species fees, Honduras enforces price ceilings and uses centralized authority to control forest production and export. Both countries exhibit weaknesses in the management control cycle of programming, budgeting, implementing and evaluating their forest policies. Yet the Costa Rican approach has increased stumpage prices already, which bodes well for their forest sector. By contrast, the major beneficiary of Honduran forest policy has been COHDEFOR, the state enterprise responsible for forestry management, controlling production, and running its national system of agroforestry cooperatives. Despite greater public authority and resources than the Costa Rican forest service (DGF), the Honduran forest policy is not likely to increase producer profitability or reduce poverty in the near future. 相似文献
37.
Provincial governments in the Netherlands have only one general tax at their disposal. However, it has become an insufficient source of revenue for this level of government in the Dutch system. To increase the revenue raising capacity of the provincial governments, thirteen broad-based general tax proposals not used at the local level were examined. The objective was to find a fair and equitable tax that could easily be collected and would result in fl. 200 million in additional revenue for the provincial governments. 相似文献
38.
Michael M. Gunter 《中东政策》2007,14(1):117-123
39.
本文分析了英国近来的一些案例,介绍了英国在采取非诉方法解决争议方面的最新发展,强调了法院在一些案件中的态度. 相似文献
40.
Angela Liberatore 《European Journal on Criminal Policy and Research》2007,13(1-2):109-137
What is the relationship between security policies and democratic debate, oversight and rights? Does coping with security threats require exceptions to the rule of law and reductions of liberties? The inquiry that follows tries to answer such questions in the context of the European Union and takes the case of biometric identification, an area were security considerations and the possible impact on fundamental rights and the rule of law are at stake. Some hypotheses are explored through the case study: “securitisation” and “democratisation” are in tension but some hybrid strategies can emerge; the plurality of “authoritative actors” influences policy frames and outcomes; and knowledge is a key asset in defining these authoritative actors. A counter-intuitive conclusion is presented, namely that biometrics, which seems prima facie an excellent candidate for technocratic decision-making, sheltered from democratic debate and accountability – is characterised by debate by a plurality of actors. Such pluralism is limited to those actors who have the resources – including knowledge – that allow for inclusion in policy making at EU level, but is nevertheless significant in shaping policy; it explains the central role of the metaphor of balancing security and democracy, as well as the “competitive cooperation” between new and more consolidated policy areas. The EU is facing another difficult challenge in the attempt at establishing itself as a new security actor and as a supranational democratic polity: important choices are at stake to assure that citizens’ security is pursued on the basis of the rule of law, respect of fundamental rights and democratic accountability. 相似文献