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   56726篇
  免费   2350篇
  国内免费   33篇
  2020年   669篇
  2019年   856篇
  2018年   1213篇
  2017年   1218篇
  2016年   1267篇
  2015年   849篇
  2014年   1073篇
  2013年   5115篇
  2012年   1841篇
  2011年   2027篇
  2010年   1192篇
  2009年   1204篇
  2008年   1821篇
  2007年   1773篇
  2006年   1568篇
  2005年   1419篇
  2004年   1404篇
  2003年   1283篇
  2002年   1325篇
  2001年   1845篇
  2000年   1733篇
  1999年   1338篇
  1998年   710篇
  1997年   614篇
  1996年   571篇
  1995年   573篇
  1994年   539篇
  1993年   548篇
  1992年   1055篇
  1991年   1001篇
  1990年   982篇
  1989年   896篇
  1988年   845篇
  1987年   835篇
  1986年   847篇
  1985年   891篇
  1984年   719篇
  1983年   610篇
  1982年   515篇
  1979年   697篇
  1978年   519篇
  1975年   628篇
  1974年   650篇
  1973年   622篇
  1972年   569篇
  1971年   495篇
  1970年   473篇
  1968年   569篇
  1967年   570篇
  1966年   497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