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   10869篇
  免费   315篇
各国政治   402篇
工人农民   391篇
世界政治   726篇
外交国际关系   307篇
法律   6863篇
中国共产党   1篇
中国政治   71篇
政治理论   2331篇
综合类   92篇
  2020年   107篇
  2019年   171篇
  2018年   205篇
  2017年   228篇
  2016年   231篇
  2015年   169篇
  2014年   202篇
  2013年   986篇
  2012年   228篇
  2011年   276篇
  2010年   226篇
  2009年   278篇
  2008年   284篇
  2007年   282篇
  2006年   269篇
  2005年   252篇
  2004年   238篇
  2003年   249篇
  2002年   250篇
  2001年   425篇
  2000年   369篇
  1999年   301篇
  1998年   160篇
  1997年   125篇
  1996年   140篇
  1995年   133篇
  1994年   141篇
  1993年   136篇
  1992年   236篇
  1991年   252篇
  1990年   240篇
  1989年   248篇
  1988年   228篇
  1987年   229篇
  1986年   264篇
  1985年   257篇
  1984年   230篇
  1983年   215篇
  1982年   151篇
  1981年   128篇
  1980年   114篇
  1979年   151篇
  1978年   85篇
  1977年   112篇
  1976年   96篇
  1975年   72篇
  1974年   89篇
  1973年   83篇
  1972年   78篇
  1971年   69篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
201.
202.
203.
204.
205.
"This work...examines the cultural dimension of sexuality and fertility of women from [low-income] sectors in Peru. It intends to explain the cultural processes that fall into the intermediate variables of fertility, such as marriage rate, contraception, breastfeeding and...abortion. These dimensions of sexual and reproductive life are analyzed according to two explanatory dimensions: generation and cultural context of socialization. The general hypothesis is that a cultural process of homogenization of the values and behaviors has been taking place over sexuality, in such a way that the younger generations will show similar standard behaviors and values no matter their context of socialization; in the meantime, in the older groups there will exist contextual differences in these dimensions." (SUMMARY IN ENG)  相似文献   
206.
207.
123 out of 850 suicides that occurred in the Canton of Geneva between 1980 and 1989 were suicides by submersion. 75 women and 48 men committed this kind of suicide. 89 victims (57 women and 32 men) were older than 40 years. In all cases the spatial distance between the residence of the suicides and the nearest river or lake was determined; a correlation with the tendency to commit suicide by drowning was not evident. More than geographical factors, the psychological influences have to be considered.  相似文献   
208.
Merrill RA 《Duke law journal》1998,47(6):1071-1094
Professor Richard Merrill contends that the Federal Food, Drug, and Cosmetic Act does not grant the FDA regulatory authority over cigarettes and smokeless tobacco products. The fact that Congress did not expressly deny the FDA regulatory authority over tobacco cannot, Professor Merrill argues, be used to infer such authority. This inference is particularly inappropriate in the case of tobacco regulation, he maintains, because there is compelling evidence that Congress had no intention of delegating this authority to the FDA. He is unpersuaded that presidential approval legally sanctions the FDA's claim of authority by granting it a superficial political legitimacy. Finally, he reminds us of the FDA's own repeated denials of jurisdiction over tobacco products, and he recalls the numerous times that Congress passed legislation directed at tobacco without granting the FDA any role in its regulation. Professor Merrill's Essay, like the other pieces in this volume, was written after the United States District Court for the Middle District of North Carolina decided Coyne Beahm v. FDA, but before a three judge panel of the United States Court of Appeals for the Fourth Circuit reversed that decision in Brown & Williamson Tobacco Corp. v. FDA. In Coyne Beahm, the District Court held that the Federal Food, Drug, and Cosmetic Act authorized the FDA to regulate tobacco products, but not tobacco advertising. The Fourth Circuit rejected the District Court's jurisdictional ruling and invalidated the FDA's regulations in their entirety. The Clinton Administration has since requested an en banc rehearing before the Fourth Circuit.  相似文献   
209.
The purpose of the present study was to characterize the psychopathology measured ten years posttreatment in 51 women who had an adolescent onset of anorexia nervosa. Outcome status was determined using the modified categories of Ratnasuriya et al.[1991]. Anorexia Nervosa: Outcome and Prognostic Factors After 20 Years, British Journal of Psychiatry, Vol. 158, pp. 495–502). Psychopathology was assessed using a number of self-report questionnaires: Beck Depression Inventory, Hamilton Depression Inventory, Leyton Obsessionality Inventory, Social Adjustment Scale, and Minnesota Multiphasic Personality Inventory. Within this adolescent age of onset sample of anorexia nervosa, age of onset was not, in and of itself, associated with increased psychopathology at follow-up. Rather, severity of eating disorder outcome was associated with general psychopathology, with patients in the poor outcome group displaying elevations on several of the measures of psychopathology.Received Ph.D. in psychology from Rutgers Univesity. Major research interests are in eating behavior and attitudes toward foods in anorexia and bulimia nervosa, preoccupations and rituals associated with eating disorders, and comorbidity and eating disorders.Received M.D. from the University of Medicine and Dentistry in New Jersey. Research interests are in eating disorders.Received M.D. from University of Minnesota Medical School-Minneapolis, MN. Major research interests are anorexia nervosa and other eating disorders.Received M.D. from the University of Iowa—Iowa City. Research interests are in eating disorders.  相似文献   
210.
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