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   69785篇
  免费   2753篇
  国内免费   39篇
  2020年   741篇
  2019年   937篇
  2018年   1350篇
  2017年   1374篇
  2016年   1459篇
  2015年   998篇
  2014年   1193篇
  2013年   5930篇
  2012年   2149篇
  2011年   2303篇
  2010年   1366篇
  2009年   1364篇
  2008年   2027篇
  2007年   2057篇
  2006年   1789篇
  2005年   1648篇
  2004年   1595篇
  2003年   1486篇
  2002年   1545篇
  2001年   2278篇
  2000年   2178篇
  1999年   1671篇
  1998年   847篇
  1997年   737篇
  1996年   693篇
  1995年   673篇
  1994年   649篇
  1993年   660篇
  1992年   1356篇
  1991年   1295篇
  1990年   1265篇
  1989年   1160篇
  1988年   1134篇
  1987年   1094篇
  1986年   1118篇
  1985年   1174篇
  1984年   914篇
  1983年   811篇
  1979年   942篇
  1978年   704篇
  1975年   828篇
  1974年   914篇
  1973年   905篇
  1972年   776篇
  1971年   703篇
  1970年   670篇
  1969年   648篇
  1968年   832篇
  1967年   790篇
  1966年   715篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
41.
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   
42.
43.
44.
45.
46.
47.
Gay marriages (as such) are not as yet allowed anywhere but the demand for them is increasing. Most countries take a liberal attitude towards marriage: few obstacles are put in its way. But objections to gay marriages continue to be raised. These objections are refuted and the case for gay marriage is assessed through the prism of various forms of liberalism. The normative argument for allowing gay marriage is shown to be both strong and consistent with many of the values upheld by the opponents of such unions.  相似文献   
48.
In three experiments we studied the relationship between contextual conditioning and the reinstatement of extinguished lever pressing that occurs when noncontingent food is introduced following extinction. In all three experiments the non-contingent food was presented off-baseline (with the response levers not present). On subsequent tests, with the response levers present, animals that had been exposed to food showed more reinstatement of lever pressing than control animals. This finding rules out alternative mechanisms for the reinstated responding that rely on the interaction of non-contingent food and responding, such as superstitious reinforcement or the discriminative after-effects of food. In addition, in each experiment we demonstrated that manipulations known to affect contextual conditioning (signalling the food in Experiment 1, context extinction in Experiment 2, and switching contexts in Experiment 3) reduced the reinstatement. These results are consistent with the claim that contextual conditioning is important in controlling instrumental conditioning and closely parallel findings concerning the reinstatement of Pavlovian responsing following extinction.  相似文献   
49.
50.
This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR.  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