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   78601篇
  免费   3090篇
各国政治   4682篇
工人农民   3138篇
世界政治   6836篇
外交国际关系   4052篇
法律   39470篇
中国共产党   11篇
中国政治   780篇
政治理论   21759篇
综合类   963篇
  2021年   457篇
  2020年   1223篇
  2019年   1582篇
  2018年   1826篇
  2017年   2154篇
  2016年   2337篇
  2015年   1900篇
  2014年   2187篇
  2013年   10938篇
  2012年   1909篇
  2011年   2055篇
  2010年   2001篇
  2009年   2181篇
  2008年   2046篇
  2007年   2043篇
  2006年   2125篇
  2005年   2029篇
  2004年   1944篇
  2003年   1778篇
  2002年   1781篇
  2001年   2217篇
  2000年   1934篇
  1999年   1656篇
  1998年   1267篇
  1997年   1094篇
  1996年   1051篇
  1995年   1017篇
  1994年   1073篇
  1993年   1070篇
  1992年   1214篇
  1991年   1247篇
  1990年   1162篇
  1989年   1256篇
  1988年   1204篇
  1987年   1221篇
  1986年   1215篇
  1985年   1257篇
  1984年   1088篇
  1983年   1149篇
  1982年   986篇
  1981年   943篇
  1980年   752篇
  1979年   839篇
  1978年   672篇
  1977年   596篇
  1976年   555篇
  1975年   483篇
  1974年   494篇
  1973年   491篇
  1972年   433篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Beck M  Hager M  Rogers P  Miller S  Rosenberg D  Snow K 《Newsweek》1993,121(14):28-33
With Bill Clinton's new reforms only a month away, the health-care system is on the operating table--and the doctors are under the knife. Americans have a love-hate relationship with physicians: they like the care that doctors provide but hold them to blame for the nation's health-care mess. NEWSWEEK looks at how the culture of medicine may change, assesses doctors' fears--and examines the brave new world of HMOs.  相似文献   
992.
Clift E  Cohn B 《Newsweek》1993,122(19):40-41
  相似文献   
993.
994.
995.
996.
Surfmen are thus called young daredevils who climb to the roof of suburban trains in Rio de Janeiro, Brazil and vie with each other in agility and prowess, some of them often falling on the railway tracks and being killed. The practice started as a need to hang on anything outside the crowded train and became a sport of sorts. Even though repressed by the railway authorities and punished by fines and imprisonment, the practice has been going on since the eighties and developed into a competition with rules, code of honour, grading of achievement. It became a means of improving self-esteem as well as securing leadership and social prestige by people who otherwise carry on lives devoid of any charm or ludic stimulus. A substitute behavior, it results from processes of cultural elaboration at work in the youth culture of our cities.  相似文献   
997.
998.
This article builds a composite index, the Central American Integration Index (IIC-AMPI), to measure economic integration. This index utilises a robust methodology and conceptual framework. The study shows that IIC-AMPI is responsive to variable changes and resistant to outliers. The findings indicate that the Deep Integration Process initiative dominates the current integration trend, as seen in the regional average score from 2015 to 2017, aligning with Guatemala and Honduras. Nicaragua demonstrates the most consistent progress, while Panama lags behind. The evidence supports the Customs Union as Central America's future integration path, highlighting the index's ability to capture the dynamic reality of economic integration.  相似文献   
999.
This article explores the development of inter-American Catholicism during the 1950s and 1960s. It analyses the role of the Chilean Catholic bishop Manuel Larraín (1900–1966) in his efforts to disseminate his diagnosis of underdevelopment in Latin America and to establish links with the Catholic world in the United States. Based on a review of his writings, the American press and documentation from Catholic organisations, it is suggested that the Chilean bishop advocated the implementation of social reforms and American collaboration to prevent the advance of communism and strengthen Catholicism on the continent.  相似文献   
1000.
Measuring School-Related Stressors in Adolescents   总被引:2,自引:0,他引:2  
Some 1620 high school students responded to 68 items that measure adolescent stressors. Thirty-five of the items were based on J. P. Kohn and G. H. Frazer's Academic Stress Scale [1(1986) An Academic Stress Scale: Identification and Rated Importance of Academic Stressors, Psychological Reports, Vol. 59, pp. 415–426] developed in the United States, while the remaining 33 items were developed from P. Strutynski's [(1985) A Survey of Queensland Year 10, 11 and 12 Student Attitudes to Schools and Schooling, State Planning Committee, International Youth Year, Brisbane] lists of the most frequently named problems of 2336 Australian high school students. Confirmatory Factor Analysis was used to test and develop a measurement model developed from an extensive review of previous scales. The High School Stressors Scale emerged from the analytic process and measures nine school-related stressors. For researchers focusing on school-related problems and stressors among adolescents, the HSSS promises to be a very useful instrument. It has sound construct and predictive validity and adequate reliability, as demonstrated by the goodness-of-fit indices the squared multiple correlations.  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