全文获取类型
收费全文 | 51138篇 |
免费 | 2087篇 |
国内免费 | 27篇 |
专业分类
53252篇 |
出版年
2020年 | 555篇 |
2019年 | 654篇 |
2018年 | 897篇 |
2017年 | 889篇 |
2016年 | 977篇 |
2015年 | 715篇 |
2014年 | 857篇 |
2013年 | 3996篇 |
2012年 | 1622篇 |
2011年 | 1637篇 |
2010年 | 1019篇 |
2009年 | 1021篇 |
2008年 | 1453篇 |
2007年 | 1445篇 |
2006年 | 1325篇 |
2005年 | 1256篇 |
2004年 | 1164篇 |
2003年 | 1118篇 |
2002年 | 1113篇 |
2001年 | 1490篇 |
2000年 | 1423篇 |
1999年 | 1090篇 |
1998年 | 574篇 |
1997年 | 538篇 |
1996年 | 511篇 |
1992年 | 987篇 |
1991年 | 935篇 |
1990年 | 941篇 |
1989年 | 824篇 |
1988年 | 792篇 |
1987年 | 792篇 |
1986年 | 835篇 |
1985年 | 931篇 |
1984年 | 733篇 |
1983年 | 671篇 |
1981年 | 490篇 |
1979年 | 784篇 |
1978年 | 524篇 |
1977年 | 512篇 |
1976年 | 510篇 |
1975年 | 670篇 |
1974年 | 762篇 |
1973年 | 792篇 |
1972年 | 670篇 |
1971年 | 620篇 |
1970年 | 600篇 |
1969年 | 597篇 |
1968年 | 775篇 |
1967年 | 688篇 |
1966年 | 617篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
141.
142.
143.
The startle probe response: a new measure of emotion? 总被引:17,自引:0,他引:17
144.
Amnesia as a consequence of male rape: a case report 总被引:2,自引:0,他引:2
145.
146.
147.
148.
H. O. F. Veiel G. Brill H. Hafner R. Welz 《American journal of community psychology》1988,16(6):839-861
The social support patterns of a sample of 101 suicide attempters were compared with the patterns of a control sample on the basis of structured interview data. Network characteristics and the extent of support in different functional categories were examined as to their absolute and relative power to discriminate between the suicide attempters and the controls. A clear separation of the functions of kin and of friends/acquaintances emerged. The crucial difference between the attempters and the controls lay in the number of friends with whom the subjects had agreeable everyday interactions and in the number of kin that provided crisis support, both psychological and instrumental. Other support differences between the two groups were of secondary importance. While there was no overall difference in the frequency of social interactions between the two groups, the size of the social network differed greatly. Consequences for the conceptualization and measurement of social support as well as for the prevention of suicidal behavior are discussed. 相似文献
149.
150.
The influences of sex, age, and conversational, partner (mother vs. stranger) on eye contact during verbalizations were examined in a longitudinal study of 33 children at 2 and 4 years of age. A free-play sample was obtained of each child interacting with mother and with a male or female experimenter. The amount of eye contact in conjunction with verbalization was analyzed. Significant main effects were found for sex (females engaged in a higher percent of eye contact than males) and conversational partner (more eye contact while speaking exhibited to experimenter than to mother). There was an interaction between age and conversational partner, in that mother received more and experimenter relatively less percent of eye contact during verbalizations as children got older. Notably, there was no main effect for age. These results revealed sex differences at an age (2–2 1/2 years) and in a context (free-play setting) not previously studied, demonstrating the robustness of the effect. Further, age findings seem indicative of unique developmental trends for eye contact during verbalizations for the ages between 2 and 4 years.Mount Saint Vicent University 相似文献