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   45459篇
  免费   1784篇
  国内免费   23篇
  2019年   477篇
  2018年   738篇
  2017年   711篇
  2016年   753篇
  2015年   514篇
  2014年   699篇
  2013年   3330篇
  2012年   1208篇
  2011年   1293篇
  2010年   790篇
  2009年   828篇
  2008年   1194篇
  2007年   1131篇
  2006年   1077篇
  2005年   945篇
  2004年   912篇
  2003年   913篇
  2002年   886篇
  2001年   1370篇
  2000年   1370篇
  1999年   1050篇
  1998年   477篇
  1997年   482篇
  1996年   455篇
  1992年   936篇
  1991年   836篇
  1990年   879篇
  1989年   786篇
  1988年   778篇
  1987年   746篇
  1986年   808篇
  1985年   849篇
  1984年   689篇
  1983年   599篇
  1982年   457篇
  1981年   448篇
  1979年   705篇
  1978年   564篇
  1977年   479篇
  1976年   485篇
  1975年   611篇
  1974年   755篇
  1973年   775篇
  1972年   600篇
  1971年   598篇
  1970年   527篇
  1969年   571篇
  1968年   711篇
  1967年   635篇
  1966年   662篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
32.
33.
34.
Two studies tested the hypothesis that certain positive emotions speed recovery from the cardiovascular sequelae of negative emotions. In Study 1, 60 subjects (Ss) viewed an initial fear-eliciting film, and were randomly assigned to view a secondary film that elicited: (a) contentment; (b) amusement; (c) neutrality; or (d) sadness. Compared to Ss who viewed the neutral and sad secondary films, those who viewed the positive films exhibited more rapid returns to pre-film levels of cardiovascular activation. In Study 2, 72 Ss viewed a film known to elicit sadness. Fifty Ss spontaneously smiled at least once while viewing this film. Compared to Ss who did not smile, those who smiled exhibited more rapid returns to pre-film levels of cardiovascular activation. We discuss these findings in terms of emotion theory and possible health-promoting functions of positive emotions.  相似文献   
35.
P Bressan 《Perception》1987,16(5):671-675
If a few parallel horizontal rows of dots are set diagonally, like steps, across the visual field, the inner rows appear not to be horizontal but sloping up to one side; the effect holds as long as the vertical distances between the rows do not exceed a given visual angle. This illusion, described by Vicario in 1978, was never explained. An experiment is reported in which the illusion was still visible at row separations well in excess of the spatial limits originally considered, provided the stimulus elements were enlarged. The maximum illusion was obtained for length ratios (interrow distance to size of dots) identical to those which have been shown to produce the largest effects in a number of illusions of area and length. This suggests that Vicario's illusion is similar to other illusions of extent, and that it can be explained by a neural extent-coding model.  相似文献   
36.
We report an eye movement experiment investigating the influence of the focus operator only on syntactic processing of "long" relative clause sentences. Paterson, Liversedge, and Underwood (1999) found that readers were garden pathed by "short" reduced relative clause sentences containing the focus operator only . They argued that due to thematic differences between "short" and "long" relative clause sentences, garden path effect might not occur when "long" reduced relative clause sentences are read. Eye-tracking data show that garden path effects found during initial processing of the disambiguating verb of "long" reduced sentences without only were absent or delayed in the case of counterparts with only . We discuss our results in terms of current theories of sentence processing.  相似文献   
37.
38.
39.
40.
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