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   66014篇
  免费   3272篇
各国政治   4435篇
工人农民   2816篇
世界政治   5864篇
外交国际关系   3771篇
法律   30247篇
中国共产党   10篇
中国政治   741篇
政治理论   20463篇
综合类   939篇
  2021年   394篇
  2020年   1149篇
  2019年   1511篇
  2018年   1626篇
  2017年   1918篇
  2016年   2134篇
  2015年   1817篇
  2014年   2088篇
  2013年   10454篇
  2012年   1552篇
  2011年   1625篇
  2010年   1778篇
  2009年   2025篇
  2008年   1673篇
  2007年   1645篇
  2006年   1813篇
  2005年   1709篇
  2004年   1614篇
  2003年   1421篇
  2002年   1460篇
  2001年   1413篇
  2000年   1227篇
  1999年   1112篇
  1998年   1067篇
  1997年   955篇
  1996年   929篇
  1995年   898篇
  1994年   895篇
  1993年   923篇
  1992年   891篇
  1991年   916篇
  1990年   877篇
  1989年   915篇
  1988年   911篇
  1987年   921篇
  1986年   904篇
  1985年   986篇
  1984年   877篇
  1983年   920篇
  1982年   864篇
  1981年   823篇
  1980年   641篇
  1979年   650篇
  1978年   580篇
  1977年   512篇
  1976年   479篇
  1975年   399篇
  1974年   419篇
  1973年   426篇
  1972年   363篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
371.
In the wake of the 1990 amendments to the Clean Air Act, localities across the United States initiated public information campaigns both to raise awareness of threats to air quality and to change behavior related to air pollution by recommending specific behavioral changes in the campaign messages. These campaigns are designed to reduce the health hazards associated with poor air quality and to avoid federal sanctions resulting from the failure to meet air quality standards. As in many other communities across the country, a coalition of government agencies and businesses initiated a public information campaign in the Atlanta metropolitan region to reduce certain targeted behaviors, mainly driving. A two‐stage model used to analyze data from a rolling sample survey shows that the centerpiece of the information campaign—air quality alerts—was effective in raising awareness and reducing driving in a segment of the population. When the overall information campaign was moderated by employers' participation in programs to improve air quality, drivers significantly reduced the number of miles they drove and the number of trips they took by car on days when air quality alerts were sounded. Public information campaigns can be successful in increasing awareness, but changing well‐established behaviors, such as driving, is likely to require institutional mediation to provide social contexts that support the behavioral change, as well. © 2003 by the Association for Public Policy Analysis and Management.  相似文献   
372.
373.
374.
375.
376.
377.
378.
379.
Ministerial reshuffles are complex exercises requiring careful handling. A frequent occurrence in British government, their significance is usually seen in political terms. Prime Ministers attach great importance to maximizing the political advantages to be gained from them. This factor is the chief determinant of their logistics, the principal characteristics of which are secrecy in advance and the speed with which ministerial changes are executed. These features - as much as the frequency of ministerial changes per se - may disrupt the policy process and have serious implications for minister-civil servant power relations. Such problems could be alleviated by giving ministers advance notice of changes of post. The institution of a process of ministerial handovers would strengthen the position of incoming ministers by making them less dependent on their officials, upon whom they rely heavily for initial briefing at present.  相似文献   
380.
During the past decade the field of psychology of law has changed considerably. Accompanying the growth of research and practice, there has been an increase in offerings of courses in this field. The courses are offered at both undergraduate and graduate levels and cover a wide spectrum of interests. The types of courses currently being offered and the student samples enrolling in the courses are examined. In addition, a review of the major textbooks used in the courses is provided.  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