全文获取类型
收费全文 | 33722篇 |
免费 | 1364篇 |
国内免费 | 13篇 |
出版年
2019年 | 416篇 |
2018年 | 599篇 |
2017年 | 631篇 |
2016年 | 665篇 |
2015年 | 504篇 |
2014年 | 594篇 |
2013年 | 3086篇 |
2012年 | 1042篇 |
2011年 | 1090篇 |
2010年 | 679篇 |
2009年 | 672篇 |
2008年 | 947篇 |
2007年 | 959篇 |
2006年 | 867篇 |
2005年 | 858篇 |
2004年 | 835篇 |
2003年 | 804篇 |
2002年 | 855篇 |
2001年 | 951篇 |
2000年 | 882篇 |
1999年 | 724篇 |
1998年 | 421篇 |
1997年 | 392篇 |
1996年 | 370篇 |
1995年 | 363篇 |
1993年 | 347篇 |
1992年 | 604篇 |
1991年 | 574篇 |
1990年 | 561篇 |
1989年 | 518篇 |
1988年 | 533篇 |
1987年 | 499篇 |
1986年 | 498篇 |
1985年 | 516篇 |
1984年 | 480篇 |
1983年 | 447篇 |
1982年 | 381篇 |
1981年 | 369篇 |
1979年 | 466篇 |
1978年 | 426篇 |
1977年 | 358篇 |
1976年 | 356篇 |
1975年 | 413篇 |
1974年 | 502篇 |
1973年 | 469篇 |
1972年 | 360篇 |
1971年 | 349篇 |
1970年 | 344篇 |
1968年 | 412篇 |
1967年 | 359篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
891.
892.
893.
Four experiments examined two alternative views of retrieval events. The results of Experiment 1 were equivocal because of an apparent “ceiling effect.” The results of Experiments 2, 3, and 4, in which changes were made in basic procedures, seemed to indicate that the act of retrieval itself had an effect on the memorability of words.
相似文献894.
55 English-speaking institutionalized adolescents (37 boys and 18 girls between ages of 14 and 19 yr.) were given questionnaires measuring perceived parental inconsistency and different components of emotional development. Canonical correlation analysis indicated that a significant proportion (51%) of the variation in emotional adjustment was accounted for by parental inconsistency. It is suggested that the efficiency of using parents as agents of change for their behaviour-disordered children can be enhanced by including theory on parenteral inconsistency in program content. 相似文献
895.
This study replicated the results of an earlier one in which college women showing psychological similarities to anorexics indicated an unrealistically larger body-image relative to controls but only if they were relatively thin. This kind of perceptual enhancement was not found when inanimate objects were rated. The proposal that an enhanced body image plays a dynamic role in motivating food restraint (and may increase the risk of becoming anorexic) was supported by an analysis of dieting strategies. 相似文献
896.
B S Randhawa 《Psychological reports》1990,66(2):531-538
The present study investigated the congruence between the factor structures of the learning environment and cognitive variables for mathematics and English courses in Grade 10. Three common factors were obtained in each course. Procedural characteristics and cognitive factors in mathematics were highly similar to the corresponding factors in English. However, the formative characteristics factor identified in mathematics was not congruent to the corresponding factor in English. Learning environment variables produced two factors. These factors resembled the congruent factor properties for the two courses when the learning environment and cognitive variables were factor analyzed together. Implications for learning and instructional research are mentioned. 相似文献
897.
The Slade model for development of anorexia nervosa proposes that the female may seek success and control in her life by pursuing a thin body through dieting when faced with serious personal problems. Extending upon this model, the present program of research has sought to identify those characteristics of women generally at-risk for anorexia nervosa that would make dieting behavior especially successful, permitting the progression from food restraint into food aversion. The present studies considered whether heightened and stress-related inner stimulation could interfere with the at-risk woman's sensitivity to hunger sensations, thereby decreasing her motivation to eat. A series of analyses conducted within two studies indicated: (1) a relationship between elevated daily stress, concern over being over-whelmed by inner feelings, and a loss of discrimination regarding sources of inner feelings, (2) a tendency to narrow attentional focus when overloaded with excessive internal stimulation, and (3) diminished sensitivity to hunger sensations for women generally at-risk for anorexia nervosa given a narrowed attentional focus. 相似文献
898.
The author is an internist in a non-university hospital. He discusses the possibilities and limits of dealing with patients suffering from ulcerative colitis and Crohn's disease. He demonstrates the clinical importance of a psychoanalytic perspective with three case illustrations. 相似文献
899.
900.
Arthur B. Millman 《Synthese》1990,82(1):23-52
This paper is a detailed critical study of Adolf Grünbaum's work on the Duhemian thesis. I show that (a) Grünbaum's geometrical counterexample to the (D1) subthesis is unsuccessful, even with minimal claims made for what the counterexample is supposed to show, and (b) the (D2) subthesis is not a reasonable one (and cannot correctly be attributed to Duhem). The paper concludes with an argument about the relation between the Duhemian thesis, concerning component hypotheses of a scientific theory, and the view that it is impossible to falsify entire theories conclusively. 相似文献