全文获取类型
收费全文 | 2188篇 |
免费 | 50篇 |
专业分类
各国政治 | 158篇 |
工人农民 | 62篇 |
世界政治 | 213篇 |
外交国际关系 | 140篇 |
法律 | 924篇 |
中国政治 | 24篇 |
政治理论 | 695篇 |
综合类 | 22篇 |
出版年
2021年 | 19篇 |
2020年 | 27篇 |
2019年 | 52篇 |
2018年 | 48篇 |
2017年 | 58篇 |
2016年 | 65篇 |
2015年 | 32篇 |
2014年 | 56篇 |
2013年 | 406篇 |
2012年 | 48篇 |
2011年 | 54篇 |
2010年 | 49篇 |
2009年 | 47篇 |
2008年 | 64篇 |
2007年 | 51篇 |
2006年 | 76篇 |
2005年 | 57篇 |
2004年 | 73篇 |
2003年 | 59篇 |
2002年 | 58篇 |
2001年 | 48篇 |
2000年 | 46篇 |
1999年 | 36篇 |
1998年 | 32篇 |
1997年 | 31篇 |
1996年 | 36篇 |
1995年 | 30篇 |
1994年 | 29篇 |
1993年 | 32篇 |
1992年 | 23篇 |
1991年 | 33篇 |
1990年 | 25篇 |
1989年 | 30篇 |
1988年 | 33篇 |
1987年 | 26篇 |
1986年 | 25篇 |
1985年 | 25篇 |
1984年 | 41篇 |
1983年 | 27篇 |
1982年 | 18篇 |
1981年 | 24篇 |
1980年 | 21篇 |
1979年 | 16篇 |
1978年 | 19篇 |
1977年 | 11篇 |
1976年 | 17篇 |
1975年 | 12篇 |
1974年 | 14篇 |
1972年 | 15篇 |
1969年 | 11篇 |
排序方式: 共有2238条查询结果,搜索用时 15 毫秒
1.
2.
Legal context: The relatively informal agreements setting up the TrilateralCooperation (TC) among the world's three most important patentoffices are contrasted with formal multinational treaties suchas the Patent Law Treaty and the abortive Substantive PatentLaw Treaty. Key points: After its inception in 1983, the TC concentrated initially ondeveloping and implementing standards for electronic storageand retrieval of prior art documents, and facilitation of searching.This was later extended to electronic sharing of priority documentsand to standardization and searching of DNA sequence databases.More recently emphasis has been placed on harmonization of searchingand examination procedures, and working groups have comparedthe approaches of the Trilateral Offices (TOs) to the patentabilityof claims in areas of new technology. Encouragingly, the resultsare usually the same, although the specific objections raisedmay differ. The ultimate goal is to reach a situation in whicha claim allowed by one TO would be accepted by the others withoutfurther examination. Practical significance: The TC has already facilitated search and examination, leadingto lower costs and shorter pendency times than would otherwisebe the case. Further progress depends on harmonization of substantivepatent law, which in turn depends on the willingness of theUSA to accept a first-to-file system. 相似文献
3.
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
4.
Philip M. Stahl 《Family Court Review》2005,43(2):260-265
In their article, Tippins and Wittmann articulate a strong position against custody evaluators making specific custody recommendations to the court. This response will focus on my thoughts about their concepts and my belief that recommendations can be useful and appropriate some of the time, even though there may be significant problems with certain types of recommendations and problems with some evaluators. 相似文献
5.
Philip M. Stahl 《Family Court Review》2003,41(4):597-602
Books reviewed in this article:
G. Andrew Benjamin and Jackie Gollan, Family Evaluation in Custody Litigation: Reducing Risks of Ethical Infractions and Malpractice . 相似文献
G. Andrew Benjamin and Jackie Gollan, Family Evaluation in Custody Litigation: Reducing Risks of Ethical Infractions and Malpractice . 相似文献
6.
7.
8.
9.
10.
Here we consider two ways that nanomedicine might be disruptive. First, low-end disruptions that are intrinsically unpredictable but limited in scope, and second, high end disruptions that involve broader societal issues but can be anticipated, allowing opportunity for ethical reflection. 相似文献