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   176987篇
  免费   7938篇
  国内免费   161篇
  2021年   1536篇
  2020年   2858篇
  2019年   3539篇
  2018年   3650篇
  2017年   4064篇
  2016年   4774篇
  2015年   4006篇
  2014年   4916篇
  2013年   24001篇
  2012年   4777篇
  2011年   3876篇
  2010年   4051篇
  2009年   4952篇
  2008年   4189篇
  2007年   3709篇
  2006年   4287篇
  2005年   4177篇
  2004年   3754篇
  2003年   3385篇
  2002年   3158篇
  2001年   3068篇
  2000年   2961篇
  1999年   3046篇
  1998年   2880篇
  1997年   2720篇
  1996年   2621篇
  1995年   2460篇
  1994年   2441篇
  1993年   2370篇
  1992年   2537篇
  1991年   2382篇
  1990年   2239篇
  1989年   2175篇
  1988年   2174篇
  1987年   2180篇
  1986年   2158篇
  1985年   2368篇
  1984年   2555篇
  1983年   2306篇
  1982年   2406篇
  1981年   2371篇
  1980年   2204篇
  1979年   2189篇
  1978年   2195篇
  1977年   2148篇
  1976年   1980篇
  1975年   1986篇
  1974年   2092篇
  1973年   1959篇
  1972年   1507篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
164.
165.
166.
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   
167.
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   
168.
169.
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   
170.
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