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   169047篇
  免费   7621篇
  国内免费   155篇
  2021年   1500篇
  2020年   2776篇
  2019年   3433篇
  2018年   3431篇
  2017年   3893篇
  2016年   4566篇
  2015年   3908篇
  2014年   4787篇
  2013年   23403篇
  2012年   4371篇
  2011年   3402篇
  2010年   3791篇
  2009年   4703篇
  2008年   3651篇
  2007年   3181篇
  2006年   3841篇
  2005年   3849篇
  2004年   3342篇
  2003年   2976篇
  2002年   2833篇
  2001年   3104篇
  2000年   2993篇
  1999年   3028篇
  1998年   2810篇
  1997年   2644篇
  1996年   2558篇
  1995年   2395篇
  1994年   2383篇
  1993年   2310篇
  1992年   2522篇
  1991年   2343篇
  1990年   2222篇
  1989年   2155篇
  1988年   2117篇
  1987年   2137篇
  1986年   2129篇
  1985年   2341篇
  1984年   2474篇
  1983年   2258篇
  1982年   2370篇
  1981年   2324篇
  1980年   2157篇
  1979年   2158篇
  1978年   2158篇
  1977年   2132篇
  1976年   1905篇
  1975年   1967篇
  1974年   2036篇
  1973年   1866篇
  1972年   1495篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
151.
152.
153.
154.
155.
156.
157.
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   
158.
In this essay I address three ways in which Edwards can inform Christian understanding of public life. First I show how Edwards provides both philosophical and theological rationales for social engagement and thereby resists the separation of religion from public life, and use his consideration of poverty as an illustration. Part II examines Edwards's dialectical treatment of patriotism, demonstrating both its importance to the Christian life and its susceptibility to deceptive accommodation to culture. Finally, in Part III I discuss Edwards's use of "national covenant," which despite its temptation to chauvinism Edwards used to undermine national pride. In the conclusion I assess what we can use from Edwards for contemporary Christian understandings of public life.  相似文献   
159.
160.
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   
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