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   18009篇
  免费   1260篇
各国政治   770篇
工人农民   942篇
世界政治   1186篇
外交国际关系   562篇
法律   12456篇
中国共产党   2篇
中国政治   112篇
政治理论   3148篇
综合类   91篇
  2023年   78篇
  2021年   87篇
  2020年   438篇
  2019年   466篇
  2018年   591篇
  2017年   614篇
  2016年   677篇
  2015年   523篇
  2014年   564篇
  2013年   1908篇
  2012年   505篇
  2011年   533篇
  2010年   539篇
  2009年   575篇
  2008年   538篇
  2007年   524篇
  2006年   560篇
  2005年   465篇
  2004年   466篇
  2003年   384篇
  2002年   434篇
  2001年   679篇
  2000年   612篇
  1999年   488篇
  1998年   244篇
  1997年   179篇
  1996年   198篇
  1995年   196篇
  1994年   181篇
  1993年   185篇
  1992年   312篇
  1991年   318篇
  1990年   297篇
  1989年   280篇
  1988年   308篇
  1987年   267篇
  1986年   324篇
  1985年   325篇
  1984年   250篇
  1983年   230篇
  1982年   180篇
  1981年   157篇
  1980年   148篇
  1979年   221篇
  1978年   116篇
  1977年   93篇
  1975年   95篇
  1974年   126篇
  1973年   79篇
  1972年   78篇
排序方式: 共有10000条查询结果,搜索用时 859 毫秒
901.
Aid and ideology     
Abstract. A conceptualization of international aid-giving behaviour, based on the notion of bounded rationality and involving the interaction of objective and subjective factors, is developed. From this conceptualization, four hypotheses are deduced to explain the variation of development aid expenditures as a percentage of GNP: the instrumental hypothesis, the humanitarian hypothesis, the ideological hypothesis, and the incremental hypothesis. These hypotheses are tested on data concerning aid allocations of 17 OECD donors for four points in time (1966, 1971, 1976, and 1981), through the use of a regression model. Results show that the model as a whole explains between 85% and 96% of the variance in the dependent variable. Tests of individual hypotheses show that the instrumental explanation is the best predictor of aid as a percentage of GNP if a lagged value of the dependent variable is used on the right-hand side of the equation. When the lagged value of the dependent variable is dropped from the equations, the best predictor is the ideological explanation. The contribution of the humanitarian explanation to the explained variance is negligible.  相似文献   
902.
User charges, which have become an important revenue enhancement device during the 1980s, have also raised a variety of counter-charges. This study examines three new mandatory Customs Service fees—for processing passengers, conveyances, and merchandise entering the United States and for special services at small airports—along with their differences and changes over time (in rate structure, exemptions, dedicated accounts, and disposition of funds). Despite support for the charges, opposition to some has arisen because of their cost to the private sector, violation of certain assumptions behind user fees, competing international obligations and policies, rival institutional interests and powers of Congress and the presidency, and changing fiscal conditions.  相似文献   
903.
904.
905.
906.
907.
908.
909.
Eighty college males were given an expanded identity status interview which included two new interpersonal-sexual areas, “attitudes towards sexual expression” and “sex-role beliefs.” The relative contribution of the new content areas as well as of the standard three areas (occupation, religion, and politics) to overall identity status was assessed by noting the extent of correspondence. Identity status in each content area was also compared with performance on the dependent variable of cognitive complexity. Ideology contributed more than occupation both to overall status rating, as well as to discrimination on the dependent variable. Results on the two new areas supported the view that interpersonal-sexual concerns are important for men's identity development as well as for women's. The finding that all interview areas corresponded well with overall identity status and discriminated significantly on the dependent measure leads to the suggestion that the process variables of crisis and commitment may so overshadow a particular content area that any content of personal relevance for the late adolescent might be used in investigating ego identity development.  相似文献   
910.
To investigate the incidence and correlates of bulimic behavior, 1268 high school females were surveyed. A 47-item questionnaire was used to identify a group of students that would meet the DSM-III criteria for a probable diagnosis of bulimia. Students were then compared across the four content areas of demographics; body perception and weight information; dieting, exercise and menstrual behavior; and frequency of bingeing and purging behavior. Results indicated that 4.9% of the students met rigorous criteria for the diagnosis of bulimia. Between-group comparisons indicated that body dissatisfaction, drive for thinness, and chronicity of dieting differentiated the two groups.This work was supported by Biomedical Research Grant #RR5476, the Sears Allstate Foundation, and the George and Tina Barr Foundation.Main interest is eating disorders.  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