全文获取类型
收费全文 | 53884篇 |
免费 | 1928篇 |
国内免费 | 15篇 |
出版年
2020年 | 457篇 |
2019年 | 583篇 |
2018年 | 2050篇 |
2017年 | 1923篇 |
2016年 | 1637篇 |
2015年 | 629篇 |
2014年 | 767篇 |
2013年 | 3371篇 |
2012年 | 1611篇 |
2011年 | 2347篇 |
2010年 | 1842篇 |
2009年 | 1383篇 |
2008年 | 1961篇 |
2007年 | 2170篇 |
2006年 | 1161篇 |
2005年 | 1140篇 |
2004年 | 1064篇 |
2003年 | 934篇 |
2002年 | 977篇 |
2001年 | 1581篇 |
2000年 | 1495篇 |
1999年 | 1102篇 |
1998年 | 531篇 |
1997年 | 454篇 |
1996年 | 456篇 |
1992年 | 854篇 |
1991年 | 827篇 |
1990年 | 840篇 |
1989年 | 793篇 |
1988年 | 768篇 |
1987年 | 742篇 |
1986年 | 741篇 |
1985年 | 797篇 |
1984年 | 655篇 |
1983年 | 604篇 |
1982年 | 492篇 |
1981年 | 452篇 |
1979年 | 715篇 |
1978年 | 528篇 |
1976年 | 476篇 |
1975年 | 592篇 |
1974年 | 685篇 |
1973年 | 693篇 |
1972年 | 560篇 |
1971年 | 541篇 |
1970年 | 499篇 |
1969年 | 558篇 |
1968年 | 677篇 |
1967年 | 589篇 |
1966年 | 564篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
221.
222.
223.
224.
225.
Ratings of pre-morbid intelligence level, derived from the hospital charts of 26 chronic schizophrenics, were correlated with the post-mortem brain volume measures of cortex, white matter, central grey matter, and ventricles. Contrary to hypothesis, no significant correlations were found. 相似文献
226.
T L Stawar 《Perceptual and motor skills》1988,67(3):960-962
The IES Arrow-Dot was administered to 41 cocaine detoxification patients. This group's scores indicated lower ego functioning and higher impulsivity and superego functioning than other clinical samples. No significant differences were noted between the Arrow-Dot scores of patients who successfully completed the program and those who did not. 相似文献
227.
A E Puente 《Perceptual and motor skills》1988,66(2):639-642
MMPI profiles of 22 chronic arthritic patients were compared to 22 control pain (nonorganic) patients. While elevations were noted in the HS, D, and Hy scales for the rheumatoid patients, the over-all profiles differed from controls on the PA scale. 相似文献
228.
Multidimensional studies of Munsell color solid 总被引:1,自引:0,他引:1
T Indow 《Psychological review》1988,95(4):456-470
229.
Strings of four unrelated letters were presented for subjects to identify, followed by a patterned mask and then a forced choice test of each letter position. In Experiment 1, the type style in the regular conditions was consistent--all of the letters were of a single type font--whereas in the mixed condition, each string contained letters from two type fonts. Compared with the mixed condition, accuracy in the regular conditions was higher overall and increased at a faster rate as a function of processing time. This held across four sessions. In Experiment 2, the font in the mixed condition was varied either between or within letter strings; sizeable advantages for the regular conditions were found with both mix-methods. The results are consistent with the idea of a schemalike perceptual system that becomes tuned to the regularities of a particular font in order to process visual information efficiently. 相似文献
230.
For 3 consecutive days cockroaches (Periplaneta americana) were exposed to either escapable, inescapable, or no shock in an escape task. Twenty-four hours later they were tested in a shuttlebox escape task. There were reliable differences between escapable and inescapable animals and between inescapable and control animals in both escape latencies and the number of failures to escape. 相似文献