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   54312篇
  免费   2200篇
  国内免费   31篇
  2020年   634篇
  2019年   797篇
  2018年   1138篇
  2017年   1141篇
  2016年   1236篇
  2015年   799篇
  2014年   970篇
  2013年   4778篇
  2012年   1757篇
  2011年   1930篇
  2010年   1126篇
  2009年   1142篇
  2008年   1746篇
  2007年   1707篇
  2006年   1513篇
  2005年   1355篇
  2004年   1335篇
  2003年   1216篇
  2002年   1254篇
  2001年   1787篇
  2000年   1676篇
  1999年   1295篇
  1998年   683篇
  1997年   587篇
  1996年   544篇
  1995年   542篇
  1994年   524篇
  1993年   527篇
  1992年   1022篇
  1991年   968篇
  1990年   948篇
  1989年   861篇
  1988年   821篇
  1987年   813篇
  1986年   812篇
  1985年   870篇
  1984年   680篇
  1983年   587篇
  1982年   490篇
  1979年   670篇
  1978年   495篇
  1976年   459篇
  1975年   603篇
  1974年   631篇
  1973年   605篇
  1972年   542篇
  1971年   482篇
  1968年   541篇
  1967年   532篇
  1966年   474篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
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   
32.
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   
33.
34.
35.
36.
37.
38.
39.
By roughly 6 years of age, children acquire the stereotype that men are more competent than women in science, technology, engineering, and mathematics (STEM), potentially leading to greater trust in scientific information provided by men. This study tested whether 3- to 8-year-old children differentially endorsed conflicting information about science and toys presented by male and female informants depicted as a ‘man’ and ‘woman’ (Exp1) or ‘scientists’ (Exp2). Children were expected to endorse toy testimony from gender-matched informants; thus, the key question concerned endorsement of science testimony. In Exp1 (N = 149), boys and girls showed a same-gender informant preference for toy testimony; however, girls endorsed the male informant's testimony more for science than for toys – but only when tested by a male experimenter. In Exp2 (N = 264), boys and girls showed a same-gender preference, irrespective of content. Findings suggest that STEM-related gender stereotypes might lead girls to trust scientific information presented by men over women in certain contexts.  相似文献   
40.
陈莲笙道长生于1917年10月25日,上海市人.历任中国道教协会副会长,中国道教协会顾问,上海市道教协会会长.上海市道教协会名誉会长,上海城隍庙住持,上海道学院院长,<上海道教>杂志主编,上海市宗教学会理事,上海市政协第七届委员,上海市政协第八、九届常委等职.  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