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   64399篇
  免费   3279篇
各国政治   4448篇
工人农民   2814篇
世界政治   5805篇
外交国际关系   3766篇
法律   28745篇
中国共产党   9篇
中国政治   737篇
政治理论   20412篇
综合类   942篇
  2023年   355篇
  2021年   394篇
  2020年   1153篇
  2019年   1505篇
  2018年   1610篇
  2017年   1909篇
  2016年   2129篇
  2015年   1820篇
  2014年   2089篇
  2013年   10549篇
  2012年   1494篇
  2011年   1569篇
  2010年   1756篇
  2009年   2013篇
  2008年   1623篇
  2007年   1592篇
  2006年   1760篇
  2005年   1657篇
  2004年   1560篇
  2003年   1363篇
  2002年   1408篇
  2001年   1280篇
  2000年   1112篇
  1999年   1027篇
  1998年   1055篇
  1997年   947篇
  1996年   924篇
  1995年   881篇
  1994年   883篇
  1993年   913篇
  1992年   845篇
  1991年   869篇
  1990年   825篇
  1989年   867篇
  1988年   864篇
  1987年   880篇
  1986年   847篇
  1985年   938篇
  1984年   853篇
  1983年   901篇
  1982年   856篇
  1981年   812篇
  1980年   626篇
  1979年   631篇
  1978年   556篇
  1977年   500篇
  1976年   463篇
  1975年   381篇
  1974年   381篇
  1973年   390篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
55.
56.
Several studies had concluded that the police subculture holds values and attitudes that are distinct from the rest of the population. Among these values is a focus on law and order. While researchers agree that police tend to hold different values, they disagree on the source of the attitudes. Some had argued that the attitudes reflected differences regarding who was recruited for law enforcement careers while others said that the differences reflected changes that occurred to individuals after becoming officers. This study examined whether police officers and students enrolled in criminal justice/sociology classes held similar or different attitudes towards the Miranda warnings. The findings suggested that in some ways, the two groups perceived the warnings in dramatically different ways, while in other ways their differences were simply a matter of degree. Implications are provided.  相似文献   
57.
This article examines the effects of negotiation practices, such as coercion and contract formality, on how suppliers and customers perceived the resulting business relationship. We conducted a purchasing negotiation simulation with students in a classroom setting in which participants competed for resources in a mock supply-chain context. The participants were surveyed at key stages of the ongoing negotiation in order to measure their behaviors as a customer–supplier relationship developed. The data were used to test several hypotheses developed from the marketing and purchasing literature. The hypotheses were analyzed using structural equation modeling.
Results demonstrated that the use of coercive techniques by negotiators during negotiation had a negative effect on satisfaction. In addition, the findings showed that, as expected, negotiators entering a negotiation with a cooperative orientation would tend to avoid the use of coercive practices during negotiation. The cooperative orientation also exhibited an unexpected positive effect on the formalization of the design of the contract between the parties. This study contributes to the current knowledge base focusing on the creation of agreements between companies and will, we hope, encourage the integration of suppliers and customers in an operating context within a supply-chain setting.  相似文献   
58.
59.
Technology transfer has generally had little impact on the assistive technology industries serving small, highly fragmented “disability markets.” Persons with disabilities often require specialized, relatively sophisticated technology. Third-party payer reimbursement rates and the low levels of disposable income among disability populations often cap product pricing. Transferring technology to these industry segments therefore poses special challenges. In October 1998, the Rehabilitation Engineering Research Center on Technology Transfer initiated the “Demand-Pull Project on Wheeled Mobility.” Successful transfers resulting from this project demonstrate that a systematic technology transfer process can be successfully applied to industries serving specialized and underserved niche markets.  相似文献   
60.
The EU has regulated chemicals since the late 1960s using both general and sectoral legislation, and exposure-based, hazard-based and risk-based decisions. A new proposal from the European Commission – on the Registration, Evaluation and Authorization of Chemicals (REACH) – will build on the experiences of the existing legislation and introduce some new concepts in the management of chemicals. This article is aimed at assessing the current chemical control mechanisms in the EU and those put forward in REACH to demonstrate how REACH is a new paradigm in chemicals management. REACH will carry forward today's experience and approach to the management of chemicals in the EU and introduces some novel aspects, such as utilizing market-based mechanisms and putting into operation the 'substitution principle'.  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