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   54670篇
  免费   2214篇
  国内免费   30篇
  56914篇
  2020年   635篇
  2019年   834篇
  2018年   1165篇
  2017年   1168篇
  2016年   1231篇
  2015年   839篇
  2014年   991篇
  2013年   4809篇
  2012年   1815篇
  2011年   1957篇
  2010年   1130篇
  2009年   1132篇
  2008年   1747篇
  2007年   1710篇
  2006年   1498篇
  2005年   1398篇
  2004年   1361篇
  2003年   1239篇
  2002年   1252篇
  2001年   1790篇
  2000年   1690篇
  1999年   1290篇
  1998年   688篇
  1997年   584篇
  1996年   535篇
  1995年   532篇
  1994年   502篇
  1993年   535篇
  1992年   1021篇
  1991年   974篇
  1990年   966篇
  1989年   861篇
  1988年   834篇
  1987年   816篇
  1986年   824篇
  1985年   869篇
  1984年   685篇
  1983年   591篇
  1982年   478篇
  1979年   661篇
  1978年   496篇
  1976年   453篇
  1975年   593篇
  1974年   624篇
  1973年   597篇
  1972年   540篇
  1971年   480篇
  1968年   545篇
  1967年   546篇
  1966年   479篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
Abstract: One claim about I , regularly made and almost universally endorsed, is that uses of the term are logically guaranteed to refer successfully (if they refer at all). The claim is only rarely formulated perspicuously or argued for. Such obscurity helps disguise the fact that those who profess to advance the claim actually turn out to support not a logical guarantee at all but merely high security through fortunate coincidence. This is not surprising. For we have no good reason to accept the claim – granted, any use of I is apt to refer successfully; but that can be explained by pragmatic features of its use. And we have some reason to reject the claim – it is notoriously difficult to see how genuine reference and guaranteed success do not exclude each other when considered as properties of the logic of any term.  相似文献   
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.
16.
17.
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   
18.
19.
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