全文获取类型
收费全文 | 57506篇 |
免费 | 2448篇 |
国内免费 | 21篇 |
出版年
2020年 | 727篇 |
2019年 | 833篇 |
2018年 | 1208篇 |
2017年 | 1214篇 |
2016年 | 1290篇 |
2015年 | 917篇 |
2014年 | 1091篇 |
2013年 | 5033篇 |
2012年 | 2020篇 |
2011年 | 2031篇 |
2010年 | 1218篇 |
2009年 | 1250篇 |
2008年 | 1740篇 |
2007年 | 1694篇 |
2006年 | 1543篇 |
2005年 | 1296篇 |
2004年 | 1340篇 |
2003年 | 1276篇 |
2002年 | 1217篇 |
2001年 | 1949篇 |
2000年 | 1819篇 |
1999年 | 1361篇 |
1998年 | 637篇 |
1997年 | 544篇 |
1996年 | 624篇 |
1995年 | 566篇 |
1994年 | 557篇 |
1993年 | 539篇 |
1992年 | 1124篇 |
1991年 | 1030篇 |
1990年 | 1009篇 |
1989年 | 970篇 |
1988年 | 943篇 |
1987年 | 873篇 |
1986年 | 869篇 |
1985年 | 917篇 |
1984年 | 738篇 |
1983年 | 638篇 |
1982年 | 485篇 |
1979年 | 762篇 |
1978年 | 573篇 |
1975年 | 604篇 |
1974年 | 682篇 |
1973年 | 704篇 |
1972年 | 606篇 |
1971年 | 563篇 |
1970年 | 485篇 |
1968年 | 613篇 |
1967年 | 532篇 |
1966年 | 508篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
113.
114.
A square-wave grating from which the fundamental harmonic has been subtracted (missing fundamental grating) when viewed from a suitable distance appears similar to another grating of periodicity three times higher. The neurons of the visual cortex of the cat, in a given range of spatial frequencies characteristic of each cell, give similar responses to the two gratings. 相似文献
115.
116.
Cyril Latimer Catherine Stevens Mark Irish Leanne Webber 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2000,53(3):765-791
This paper reports the operation of robust attentional bias to the top and right during perception of small, single geometric forms. Same/different judgements of successively presented standard and comparison forms are faster when local differences are located at top and right rather than in other regions of the forms. The bias persists when form size is reduced to approximately one degree of visual angle, and it is unaffected by saccadic eye movements and by instructions to attend to other reliably differentiating regions of the forms. Results lend support in various degrees to two of the possible explanations of the bias: (1) a static, skewed distribution of attentional resources around eye fixation; and (2) biased, covert scanning that commences invariably at the top and right of stim ulus forms. Origins of the bias in terms of possible left-hemispheric capacity for constructing representations of visual stimuli from parts, as well as in terms of reading experience and prevailing optic flow during locomotion through space are considered. Recent investigations of conditions under which the bias can be maintained or reduced are mentioned. 相似文献
117.
118.
119.
120.
Aaronette M. White Michael J. Strube Sherri Fisher 《Psychology of women quarterly》1998,22(2):157-175
A Black feminist model was used to investigate rape myth acceptance between African American antirape activists and a comparison group of nonactivists using Cross's (1991) racial identity model and Downing and Roush's (1985) feminist identity model. As predicted, activists rejected rape myths more than nonactivists; the earlier stages of both models were associated with rape myth acceptance; the later stages were associated with rape myth rejection; and activists evidenced more sociopolitical maturity (race and gender consciousness) than nonactivists. The findings suggest that researchers may need to investigate to what degree rape myth acceptance serves an overarching system of social domination where racism and sexism overlap. 相似文献