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   20511篇
  免费   1214篇
各国政治   663篇
工人农民   1417篇
世界政治   1079篇
外交国际关系   649篇
法律   13843篇
中国共产党   1篇
中国政治   87篇
政治理论   3903篇
综合类   83篇
  2020年   348篇
  2019年   354篇
  2018年   1642篇
  2017年   1633篇
  2016年   1480篇
  2015年   495篇
  2014年   440篇
  2013年   1328篇
  2012年   463篇
  2011年   1266篇
  2010年   1512篇
  2009年   1068篇
  2008年   1008篇
  2007年   940篇
  2006年   387篇
  2005年   329篇
  2004年   418篇
  2003年   389篇
  2002年   256篇
  2001年   463篇
  2000年   363篇
  1999年   317篇
  1998年   177篇
  1997年   151篇
  1996年   137篇
  1995年   169篇
  1994年   177篇
  1993年   127篇
  1992年   240篇
  1991年   250篇
  1990年   226篇
  1989年   238篇
  1988年   223篇
  1987年   193篇
  1986年   229篇
  1985年   239篇
  1984年   236篇
  1983年   199篇
  1982年   165篇
  1981年   136篇
  1980年   133篇
  1979年   168篇
  1978年   104篇
  1977年   97篇
  1976年   73篇
  1975年   74篇
  1974年   82篇
  1973年   68篇
  1972年   56篇
  1971年   57篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Fatal fall from a height initiated with a swinging motion on the sagittal plane of the victim's body is examined. Method of analytical mechanics is adopted to establish the functional relations between the swinging angle of the body and the force needed to sustain the body until release, and the amount of the horizontal displacement that would occur after release. The analysis is applied to support an expert opinion presented in a criminal court in which two accused were convicted of murder for dropping a female victim from a bridge. The results indicate that it is unlikely for the body to locate as recorded by the police investigation report in the case. This study demonstrates that a straightforward mechanical analysis can be utilized to examine uncommon falling scenarios.  相似文献   
2.
3.
In 1991 the FCC implemented a price cap plan for local exchange carriers' interstate access service designed to deal with the regulatory boundaries problem arising from the breakup of AT&T in 1984. The experience with the price cap plan demonstrates the difficulty of predicting productivity growth accurately and makes clear that regulators cannot depend upon a pure price cap plan to keep prices within a reasonable range of costs. With periodic reviews to readjust plan parameters, however, a price cap plan can maintain the rate-of-return close to the target rate-of-return without diminishing the price cap plan's incentives for efficient production. A simple method of recalculating the X-factor based on the rate-of-return over the previous three years worked well in simulations. If this procedure had been used over the price cap period 1991 to 2000, prices would have been 20 percent lower and expenditures on LECs' telecommunications service subject to a price cap would have been $3.8 billion lower.  相似文献   
4.
Professions are granted a form of cartel that enables them to charge more than would arise in a free market on the assumption that they provide better quality and are more trustworthy than free-market actors would be. The theoretical assumption that lawyers are more competent than nonlawyers has given rise to significant formal protections for professions in many jurisdictions. Two testable propositions arise from this theory: (1) lawyers cost more, but (2) they deliver higher quality. It is a testing of these twin propositions that is the subject of this article, with well-triangulated data and a deeper understanding of the theoretical differences between lawyers and nonlawyers.  相似文献   
5.
6.
The present study measured the existence of traumatic stress symptomatology as reported by certified law enforcement officers within the State of Delaware. A questionnaire was devised which documented age, sex, race, education, years of service, marital status, children, rank, position, and shift work. The questionnaire was divided into parts which assessed the exposure and the frequency of specific traumatic incidents experienced in the line of duty, and the frequency of experienced traumatic symptomatology criteria: re-experiencing, numbing, and arousal.  相似文献   
7.
8.
9.
This article explores the influence that state finance has had on the Romanian party system by examining the entry and exit of parties throughout the period of 1990 – 2004 and focusing on the number of parties that gained representation in the parliament as well as the party incumbency rate. I find that state finance has had a limited influence on the party system as a whole but has been influential for specific parties. I argue that the influence of state finance partly depends on when the system was introduced. In developing party systems, the influence of state finance on individual parties is more differential.  相似文献   
10.
After the Agreement on the Trade-Related Aspects of Intellectual Property Rights (TRIPS) came into operation in 1995 developing countries have found themselves in a process of continual negotiation over intellectual property rights and access to medicines. These negotiations have taken place in the World Trade Organization and in the context of free trade agreements. The paper suggests that the only real win for developing countries has been the Doha Declaration on the TRIPS Agreement and Public Health in 2001. What have been the lessons for developing countries in a decade of negotiations over access to medicines? Drawing on themes of rule complexity and regulatory ritualism the paper discusses four key lessons for developing countries. It concludes by arguing that developing countries will do better if they adopt a networked governance approach to negotiation rather than continuing to rely on traditional coalition formation.  相似文献   
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