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   569篇
  免费   19篇
各国政治   36篇
工人农民   81篇
世界政治   37篇
外交国际关系   29篇
法律   275篇
中国政治   6篇
政治理论   120篇
综合类   4篇
  2024年   2篇
  2023年   5篇
  2022年   5篇
  2020年   10篇
  2019年   7篇
  2018年   17篇
  2017年   18篇
  2016年   26篇
  2015年   13篇
  2014年   11篇
  2013年   83篇
  2012年   18篇
  2011年   19篇
  2010年   17篇
  2009年   15篇
  2008年   17篇
  2007年   23篇
  2006年   20篇
  2005年   15篇
  2004年   23篇
  2003年   17篇
  2002年   11篇
  2001年   10篇
  2000年   10篇
  1999年   12篇
  1998年   11篇
  1997年   10篇
  1996年   9篇
  1995年   7篇
  1994年   12篇
  1993年   12篇
  1992年   11篇
  1991年   12篇
  1990年   14篇
  1989年   5篇
  1988年   10篇
  1986年   2篇
  1985年   8篇
  1984年   6篇
  1983年   6篇
  1982年   5篇
  1980年   4篇
  1979年   5篇
  1978年   1篇
  1977年   2篇
  1976年   1篇
  1975年   5篇
  1974年   1篇
  1972年   2篇
  1970年   1篇
排序方式: 共有588条查询结果,搜索用时 15 毫秒
561.
562.
563.
Alprazolam is a commonly prescribed benzodiazepine. The abuse of benzodiazepines is most frequently seen in conjunction with the abuse of other drugs. Only rare fatalities have been attributed to alprazolam alone. We undertook a retrospective review of cases investigated by the Palm Beach County Medical Examiner's Office in which postmortem toxicologic studies indicated the presence of alprazolam, to further study the pattern of alprazolam abuse. Our review consisted of 178 cases, including 87 in which death was attributed to combined drug toxicity, 2 to alprazolam toxicity alone, 44 to trauma, 12 to natural causes, and 33 to another drug or drugs. Cocaine and methadone were the most common cointoxicants in the cases of combined drug toxicity, while heroin was less frequently detected. There was considerable overlap in the postmortem blood alprazolam concentrations among the groups. The overlapping ranges of concentrations of alprazolam detected indicate that it may be difficult to define a lethal alprazolam range, and that it may not be possible to determine the actual role of alprazolam as a causal factor in cases of combined drug toxicity. This study confirms that alprazolam alone is rarely a cause of death, and that alprazolam abuse usually occurs within a polydrug use pattern. The high incidence of cocaine as a cointoxicant has not been previously reported.  相似文献   
564.
565.
This article applies a broad theoretical framework identifying factors which provide an understanding of the relationship between electoral politics, organizational reform and institutional change. In focusing upon product i v i t y reforms undertaken in the 1970's and early 1980's. the authors find that political conflicts over measures of public performance may contribute to a life cycle in which organizational structures are reconstituted and subjects of regulation o r services redefined in ways that are potentially inconsistent with the demand for public accountability. The conjunction of such factors may contribute to a crisis of legitimacy resulting in the redefinition of the boundaries between public and private realms of responsibility, as expressed in the electoral process. Today liberal reformers are confronted by a dilemma of productivity and legitimacy involved in the cycle of reform and retrenchment in which the goal of public accountability is undermined by erosion of the rights of the subject. The attempt to break this bind requires, in part, an explicitness on the part of liberals about the presuppositions regarding the subject underpining the measures and strategies by which organizational reforms are undertaken.  相似文献   
566.
The current study investigated the relationship between self-reports of depressed mood, self-esteem, and endorsement of sex-typed personality characteristics in a normal adolescent population. For positively valenced (socially desirable) sex-typed characteristics, masculinity was inversely related to depression while femininity was not significantly related. In contrast, for negatively valenced sex-typed characteristics the masculine and feminine scales showed similar effects: all were positively correlated with depression. Self-esteem was the best single predictor of depression and none of the sextyped characteristics contributed significantly beyond that accounted for by self-esteem. The results support previous findings with younger children and high school students by demonstrating that sex-typed characteristics in adolescents are significantly associated with depression, although this relationship is accounted for by the variance shared with self-esteem, a more general measure of mental health. However, the presence of negative feminine-typed characteristics was as highly correlated with depression as the absence of positive masculine characteristics and both relationships were stronger for females than males. Thus the linkages between sex-role socialization, sex-typed characteristics, self-esteem, depressed mood, and clinical depression bear further investigation, and may prove useful in understanding the development of depression in males and females.Received Ph.D. in clinical psychology from the Pennsylvania State University in 1976. Current research interests include the development of depression and eating disorders.Received Ph.D. in Counseling Psychology from the Pennsylvania State University in 1981. Current research interest is childhood depression.  相似文献   
567.
568.
569.
570.
Jan H. Blits teaches in the University Honors Program at the University of Delaware and was previously Secretary of the Navy Distinguished Fellow at the U.S. Naval Academy. He has published two books and numerous articles on educational and political philosophy.  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