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   20784篇
  免费   1457篇
各国政治   684篇
工人农民   816篇
世界政治   1442篇
外交国际关系   590篇
法律   14580篇
中国共产党   35篇
中国政治   201篇
政治理论   3682篇
综合类   211篇
  2021年   103篇
  2020年   449篇
  2019年   448篇
  2018年   573篇
  2017年   656篇
  2016年   711篇
  2015年   604篇
  2014年   597篇
  2013年   1946篇
  2012年   490篇
  2011年   609篇
  2010年   701篇
  2009年   723篇
  2008年   579篇
  2007年   577篇
  2006年   662篇
  2005年   530篇
  2004年   500篇
  2003年   447篇
  2002年   429篇
  2001年   725篇
  2000年   639篇
  1999年   516篇
  1998年   292篇
  1997年   236篇
  1996年   238篇
  1995年   235篇
  1994年   257篇
  1993年   229篇
  1992年   384篇
  1991年   442篇
  1990年   395篇
  1989年   402篇
  1988年   409篇
  1987年   361篇
  1986年   392篇
  1985年   392篇
  1984年   365篇
  1983年   320篇
  1982年   240篇
  1981年   240篇
  1980年   215篇
  1979年   236篇
  1978年   174篇
  1977年   144篇
  1976年   129篇
  1975年   130篇
  1974年   138篇
  1973年   138篇
  1971年   100篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
The following is an edited version of the proceedings of a symposium sponsored by the Middle East Policy Council on May 26, 1994, in the Hart Senate Office Building in Washington, DC. Former Senator George McGovern, President of the Council, introduced the panel; Thomas R. Mattair, the Councis Director of Research and Policy Analysis, was the organizer and moderator; Michael Collins Dunn, Senior Analyst of The International Estimate, Inc., and editor of its biweekly newsletter, The Estimate, was the discussant.  相似文献   
952.
953.
The purpose of this study was to test hypotheses regarding (1) relations among negative affect and hormones of gonadal and adrenal origin in young adolescents, at three times of measurement, over a one-year period; and (2) stability of negative affect. The sample consisted of 10- to 14-year-old boys (N=56) and 9- to 14-year-old girls (N=52). The adolescents were assessed three times at 6-month intervals over one year. Serum levels of gonadotropins, gonadal steroids, adrenal androgens, and cortisol were assessed, as well as stage of pubertal development (Tanner criteria). The negative affect assessments consisted of self-report questionnaire and interview measures of anxiety and depressive affect, as well as mother reports of internalizing behavior problems. In the concurrent (cross-sectional) analyses, boys reporting higher levels of negative affect tended to be those at higher genital stage or older age, with lower testosterone and cortisol levels and lower dehydroepian-drosterone sulphate levels. In the longitudinal analyses, negative affect, and to a lesser extent hormone levels at the first time of measurement predicted negative affect 12 months later. The findings suggest that puberty-related hormone levels should be considered along with psychological characteristics in examining the processes involved in the development of negative affect during the pubertal years.Received Ph.D. from The Pennsylvania State University. Research interests include hormone-behavior interactions and emotional development.Received Ph.D. from The Pennsylvania State University. Research interests include neuroendocrinology and adolescent depression.Recieved M.D. from Athens University. Research interests include hypothalamic releasing factors and stress.  相似文献   
954.
Body image and weight loss beliefs and behaviors were assessed in 341 female and 221 male high school students. Estimates of body dissatisfaction varied depending on the measurement strategy used. Despite having similar weight distributions around the expected norm, girls were significantly more dissatisfied with their bodies than boys. Body Mass Index was positively related to body dissatisfaction in girls and boys, while higher exercise levels were related to higher body satisfaction in boys. Nearly two-thirds of girls and boys believed being thinner would have an impact on their lives, but the majority of girls believed this would be positive while the majority of boys believed this would be negative. Thirteen percent of female subjects reported using one or more extreme weight loss behavior at least weekly. Beliefs regarding the effectiveness of different weight loss measures were assessed. Weight loss behaviors in this Australian sample appear similar to comparable U.S. samples.Received Ph.D. from University of Tasmania. Main research interest in body image, weight loss behaviors, and eating disorders.Received Ph.D. from University of Connecticut. Main research interest in body image, eating disorders and weight loss behaviors.Dietitian degree from Melbourne University, Melbourne. Main research interest in eating practices and clinical outcome.M.D. from University of Melbourne, D.P.M. from U.K. FRC Psych. Main research interests in eating disorders.B.B.Sc.(Hons.) received from La Trobe University, Melbourne, B.A. received from University of Minnesota, Duluth. Main research interest in attitudes and attributions.B.A. Received from University of Minnesota, Duluth. Main research interest in adolescence and eating disorders.  相似文献   
955.
The policy movement is unified by a common interest in the improvement of policy decisions through scientific inquiry. The movement is differentiated, however, because this common interest is highly ambiguous and subject to interpretation from different perspectives. This paper applies a policy sciences perspective to the movement's disappointments over the last few decades, and in particular, the failure to realize earlier aspirations for rational, objective analysis on the more important and controversial policy issues. The paper offers a definition and diagnosis of the underlying problem, and suggests what can be done about it as a matter of individual and collective choice.  相似文献   
956.
957.
James D. Wright 《Society》1991,28(5):81-84
He written widely on a variety of topics and is author or co-author of many books and articles. Among his books are Address Unknown: Homelessness in America; Homelessness and Health; After the Clean-Up: Long Range Effects of Natural Disasters; Armed and Considered Dangerous: A Survey of Felons and Firearms; Under the Gun: Weapons Crime and Violence in America;and The State of the Masses.His current research focusses on adolescent violence and on treament programs for homeless alcohol and drug abusers.  相似文献   
958.
959.
960.
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