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   61174篇
  免费   2338篇
  国内免费   31篇
  63543篇
  2020年   663篇
  2019年   849篇
  2018年   1189篇
  2017年   1197篇
  2016年   1281篇
  2015年   868篇
  2014年   1067篇
  2013年   5477篇
  2012年   1933篇
  2011年   2106篇
  2010年   1274篇
  2009年   1285篇
  2008年   1934篇
  2007年   1954篇
  2006年   1727篇
  2005年   1577篇
  2004年   1532篇
  2003年   1427篇
  2002年   1467篇
  2001年   1876篇
  2000年   1802篇
  1999年   1397篇
  1998年   820篇
  1997年   702篇
  1996年   648篇
  1995年   650篇
  1994年   624篇
  1993年   621篇
  1992年   1123篇
  1991年   1065篇
  1990年   1037篇
  1989年   947篇
  1988年   918篇
  1987年   901篇
  1986年   909篇
  1985年   962篇
  1984年   792篇
  1983年   711篇
  1982年   618篇
  1981年   562篇
  1980年   557篇
  1979年   763篇
  1978年   628篇
  1976年   562篇
  1975年   710篇
  1974年   741篇
  1973年   718篇
  1972年   632篇
  1968年   604篇
  1967年   583篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior.  相似文献   
15.
Two studies tested the hypothesis that certain positive emotions speed recovery from the cardiovascular sequelae of negative emotions. In Study 1, 60 subjects (Ss) viewed an initial fear-eliciting film, and were randomly assigned to view a secondary film that elicited: (a) contentment; (b) amusement; (c) neutrality; or (d) sadness. Compared to Ss who viewed the neutral and sad secondary films, those who viewed the positive films exhibited more rapid returns to pre-film levels of cardiovascular activation. In Study 2, 72 Ss viewed a film known to elicit sadness. Fifty Ss spontaneously smiled at least once while viewing this film. Compared to Ss who did not smile, those who smiled exhibited more rapid returns to pre-film levels of cardiovascular activation. We discuss these findings in terms of emotion theory and possible health-promoting functions of positive emotions.  相似文献   
16.
17.
18.
19.
The essay examines intellectual virtue in the Summa theologiae, taking it as an interpretative key to the epistemology of the Summa theologiae as a whole. Because Aquinas blurs the line between the acquired and the theological virtues, and between virtues and the gifts of the Spirit, it becomes impossible to maintain the distinction between the realms of nature and grace, or between natural reason and revealed truth: grace permeates the most ordinary activities of human reasoning. This reading of the Summa theologiae raises questions about many contemporary debates, particularly those concerning natural law.  相似文献   
20.
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