全文获取类型
收费全文 | 75420篇 |
免费 | 3104篇 |
国内免费 | 29篇 |
专业分类
78553篇 |
出版年
2020年 | 755篇 |
2019年 | 928篇 |
2018年 | 1316篇 |
2017年 | 1309篇 |
2016年 | 1403篇 |
2015年 | 972篇 |
2014年 | 1208篇 |
2013年 | 5545篇 |
2012年 | 2213篇 |
2011年 | 2414篇 |
2010年 | 1462篇 |
2009年 | 1503篇 |
2008年 | 2126篇 |
2007年 | 2151篇 |
2006年 | 1989篇 |
2005年 | 1732篇 |
2004年 | 1618篇 |
2003年 | 1532篇 |
2002年 | 1603篇 |
2001年 | 2480篇 |
2000年 | 2439篇 |
1999年 | 1864篇 |
1998年 | 870篇 |
1997年 | 782篇 |
1996年 | 762篇 |
1993年 | 701篇 |
1992年 | 1564篇 |
1991年 | 1438篇 |
1990年 | 1445篇 |
1989年 | 1313篇 |
1988年 | 1269篇 |
1987年 | 1238篇 |
1986年 | 1303篇 |
1985年 | 1362篇 |
1984年 | 1129篇 |
1983年 | 1012篇 |
1982年 | 738篇 |
1981年 | 711篇 |
1979年 | 1164篇 |
1978年 | 860篇 |
1975年 | 974篇 |
1974年 | 1081篇 |
1973年 | 1179篇 |
1972年 | 968篇 |
1971年 | 903篇 |
1970年 | 796篇 |
1969年 | 829篇 |
1968年 | 1071篇 |
1967年 | 951篇 |
1966年 | 852篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
221.
222.
Context and structure in conceptual combination 总被引:8,自引:0,他引:8
223.
Connectionism and cognitive architecture: a critical analysis 总被引:54,自引:0,他引:54
224.
A precursor of language acquisition in young infants 总被引:6,自引:0,他引:6
225.
Charles E. Burt Lawrence H. Cohen Jeffrey P. Bjorck 《American journal of community psychology》1988,16(1):101-122
A longitudinal design was employed to test the main and stress-moderating effects of young adolescents' perceived family environment (Family Environment Scales; FES; Moos & Moos, 1981) on their depression, anxiety, and self-esteem. This study was part of a larger longitudinal project (L. Cohen, Burt, & Bjorck, 1987) that demonstrated the significant cross-sectional effects of the young adolescents' controllable and uncontrollable negative events, and the significant longitudinal effects of the former. The present cross-sectional analyses demonstrated the hypothesized main effects of the FES scores; families perceived as cohesive, organized, and expressive were related to positive psychological functioning, whereas families perceived as conflict-ridden and controlling were related to negative functioning. However, in general these effects were nonsignificant in the longitudinal analyses. Although there were a number of significant Negative Events x FES interactions, in no instance did the pattern support the hypothesized stress-buffering role of positive family climate. 相似文献
226.
227.
228.
229.
J. MARTIN STAFFORD 《Journal of applied philosophy》1988,5(1):87-100
ABSTRACT In his book Sexual Desire , Roger Scruton wrongly maintains that human sexual experience is essentially intentional. His thesis depends on his highly revisionary definitions of 'sexual arousal' and 'sexual desire', the artificial nature of which I expose and criticise.
He admits that homosexual desire is capable of the same kind of intentionality as heterosexual desire, and is therefore not intrinsically obscene or perverted, but he advances reasons why homosexuality is morally different from heterosexuality and is therefore an object of disapproval. His arguments presuppose 'an impassable moral divide' between the sexes and are, on his own admission, not very cogent.
Since he allows that homosexual desire is a natural and spontaneous phenomenon and also proposes that moral education should guide us towards a state in which our sexuality is entirely integrated within a life of personal affection and responsibility, consistency requires that he adopt a sexual ideology which does not discriminate against homosexuality. For homosexuals are unlikely to achieve the 'sexual integrity' which Scruton advocates (and which I endorse) if they are constantly encouraged to disparage their own sexual nature and if social institutions make no positive provision for them. 相似文献
He admits that homosexual desire is capable of the same kind of intentionality as heterosexual desire, and is therefore not intrinsically obscene or perverted, but he advances reasons why homosexuality is morally different from heterosexuality and is therefore an object of disapproval. His arguments presuppose 'an impassable moral divide' between the sexes and are, on his own admission, not very cogent.
Since he allows that homosexual desire is a natural and spontaneous phenomenon and also proposes that moral education should guide us towards a state in which our sexuality is entirely integrated within a life of personal affection and responsibility, consistency requires that he adopt a sexual ideology which does not discriminate against homosexuality. For homosexuals are unlikely to achieve the 'sexual integrity' which Scruton advocates (and which I endorse) if they are constantly encouraged to disparage their own sexual nature and if social institutions make no positive provision for them. 相似文献
230.
When a limb is used for locomotion, patterns of afferent and efferent activity related to its own motion are present as well as visual, vestibular, and other proprioceptive information about motion of the whole body. A study is reported in which it was asked whether visual stimulation present during whole-body motion can influence the perception of the leg movements propelling the body. Subjects were tested in conditions in which the stepping movements they made were identical but the amount of body displacement relative to inertial space and to the visual surround varied. These test conditions were created by getting the subjects to walk on a rotatable platform centered inside a large, independently rotatable, optokinetic drum. In each test condition, subjects, without looking at their legs, compared, against a standard condition in which the floor and drum were both stationary, their speed of body motion, their stride length and stepping rate, the direction of their steps, and the perceived force they exerted during stepping. When visual surround motion was incompatible with the motion normally associated with the stepping movements being made, changes in apparent body motion and in the awareness of the frequency, extent, and direction of the voluntary stepping movements resulted. 相似文献