全文获取类型
收费全文 | 52722篇 |
免费 | 2181篇 |
国内免费 | 36篇 |
出版年
2020年 | 632篇 |
2019年 | 734篇 |
2018年 | 1049篇 |
2017年 | 1071篇 |
2016年 | 1100篇 |
2015年 | 808篇 |
2014年 | 939篇 |
2013年 | 4215篇 |
2012年 | 1674篇 |
2011年 | 1845篇 |
2010年 | 1173篇 |
2009年 | 1119篇 |
2008年 | 1553篇 |
2007年 | 1489篇 |
2006年 | 1337篇 |
2005年 | 1193篇 |
2004年 | 1118篇 |
2003年 | 1132篇 |
2002年 | 1096篇 |
2001年 | 1851篇 |
2000年 | 1775篇 |
1999年 | 1305篇 |
1998年 | 615篇 |
1997年 | 548篇 |
1996年 | 497篇 |
1995年 | 482篇 |
1993年 | 476篇 |
1992年 | 1083篇 |
1991年 | 1034篇 |
1990年 | 1004篇 |
1989年 | 938篇 |
1988年 | 881篇 |
1987年 | 860篇 |
1986年 | 851篇 |
1985年 | 918篇 |
1984年 | 730篇 |
1983年 | 610篇 |
1981年 | 476篇 |
1979年 | 683篇 |
1978年 | 544篇 |
1977年 | 505篇 |
1975年 | 623篇 |
1974年 | 686篇 |
1973年 | 681篇 |
1972年 | 585篇 |
1971年 | 497篇 |
1969年 | 529篇 |
1968年 | 601篇 |
1967年 | 503篇 |
1966年 | 588篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Smelling via the mouth: effect of aging 总被引:1,自引:0,他引:1
932.
933.
934.
Capture of stereopsis and apparent motion by illusory contours 总被引:1,自引:0,他引:1
V S Ramachandran 《Perception & psychophysics》1986,39(5):361-373
935.
936.
937.
It is proposed that runner's high is mediated by increased endorphin release as induced by placebo responses arising from subjective expectancies and setting. 相似文献
938.
Taste sensitivity for sodium chloride in solution and sensitivity and preference for sodium chloride in bread were measured in 14 male patients undergoing hemodialysis. There was an increase in sensitivity to salt taste following dialysis only when assessed using the bread samples. Patients on a lower sodium diet were more sensitive to salt taste in bread. Although the taste changes were not related to the decreases in serum sodium or to copper, greater increases in sensitivity were related to greater increases in serum zinc during dialysis. 相似文献
939.
A general fear of crime victimization led to modified activities in the community and feelings of relative safety in their own area for 132 elderly respondents on a 24-item questionnaire. They held sympathetic views of crime perpetrators as disadvantaged victims of society themselves, but came to the unlikely conclusions that more police control and harsher prison sentences are needed. 相似文献
940.
Electroencephalographically oriented research on vigilance needs valid measures for assessing the level of vigilance between wakefulness and sleep. When studying different psychologically, psychopathologically, and pharmacologically induced states, special attention has to be paid to minor alterations of the level of vigilance which are reflected, essentially, in topographical changes of alpha-activity (Stage A). Since vigilance is a dynamic process, brief fluctuations in the range of a few seconds must also be recorded. In our opinion existing methods of quantification do not fully meet these demands. We have, therefore, developed a relatively simple procedure which can be characterized as an attempt quantitatively to reconstruct visually, i.e., spatiotemporally defined patterns of vigilance. The usefulness of this method, which also has certain limitations, has been demonstrated in psychopharmacological studies. 相似文献