首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   31784篇
  免费   1388篇
各国政治   1387篇
工人农民   1977篇
世界政治   1762篇
外交国际关系   1115篇
法律   20378篇
中国共产党   2篇
中国政治   146篇
政治理论   6256篇
综合类   149篇
  2021年   121篇
  2020年   492篇
  2019年   530篇
  2018年   1848篇
  2017年   1841篇
  2016年   1738篇
  2015年   657篇
  2014年   689篇
  2013年   2677篇
  2012年   781篇
  2011年   1495篇
  2010年   1599篇
  2009年   1213篇
  2008年   1351篇
  2007年   1340篇
  2006年   712篇
  2005年   641篇
  2004年   745篇
  2003年   679篇
  2002年   582篇
  2001年   904篇
  2000年   789篇
  1999年   654篇
  1998年   338篇
  1997年   271篇
  1996年   283篇
  1995年   278篇
  1994年   266篇
  1993年   244篇
  1992年   410篇
  1991年   435篇
  1990年   426篇
  1989年   410篇
  1988年   431篇
  1987年   405篇
  1986年   455篇
  1985年   434篇
  1984年   366篇
  1983年   349篇
  1982年   247篇
  1981年   240篇
  1980年   206篇
  1979年   331篇
  1978年   199篇
  1977年   173篇
  1976年   135篇
  1975年   173篇
  1974年   203篇
  1973年   159篇
  1972年   132篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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   
52.
53.
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   
54.
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   
55.
Investigative bodies and other observers have attributed much of the blame for the 1985 MOVE catastrophe in Philadelphia to ineffective management by the city's previously successful mayor, W. Wilson Goode. Goode's behavior toward the disruptive extremist group followed two patterns, both paradoxical: protracted delay followed by excessive haste, and arms-length action that contrasted sharply with his usual hands-on management style. Drawing on the theory of decisionmaking developed by Irving Janis and Leon Mann, this paper suggests that both paradoxes resulted from unresolved decisional conflicts that impeded responsible and rational handling of the problem. The case points to the value of devoting more attention to the psychology of decision-making in educating present and future public managers.  相似文献   
56.
57.
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   
58.
  East Asia, including Northeast Asia and Southeast Asia, has developed tightly-linked production/distribution networks through globalizing corporate activities. The vertical chain of production in East Asia has been even more sophisticated than economic integration in East Europe or Latin America. However, the political environment of East Asia for trade and investment has been far from borderless. The integration effort at the policy level has been very much limited so far, due to the historical background as well as geopolitics surrounding East Asia. The Asian currency/financial crisis provided these countries a historical turning point. After the burst of the crisis, East Asians realized that they have to take care of themselves in their difficulties, not depending on outside forces. A natural choice for them was to step into the realm of regionalism. In 1998, Japan and Korea officially announced that they would discard the long-lasting GATT/WTO-only approach and adapt the multi-layered approach, including both regionalism and multilateralism. The ultimate goal of regionalism would be a region-wide integration including ASEAN+3. As a steppingstone, Japan signed the Japan-Singapore Economic Partnership Agreement (JSEPA) in January 2002. In a parallel move, the ASEAN and China Leaders announced in November 2001 the establishment of an ASEAN-China Free Trade Area (ACFTA) within 10 years. This article will follow up the most recent advancement of regional institutional building in East Asia with the emphasis on peculiar characteristics of economic integration in the region and discuss its implications for Asia-Europe relations. This paper is heavily drawn from Kimura (2002, 2003).  相似文献   
59.
This paper links the policy context regarding S&T parks to the objectives and characteristics of the established parks and incubators in a relatively small, converging European country. S&T parks and incubators in Greece during the past decade and a half have gradually shifted in terms of ownership and management from university/research institute to the private sector and in terms of financing from public to private funds, also involving the provision of seed capital and access to venture capital. This gradual shift toward more private engagement has created a variety of models out of which, it is hoped, successful innovative companies will emerge in larger numbers than in the past.
  相似文献   
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号