全文获取类型
收费全文 | 65687篇 |
免费 | 2700篇 |
国内免费 | 45篇 |
专业分类
68432篇 |
出版年
2020年 | 767篇 |
2019年 | 921篇 |
2018年 | 1338篇 |
2017年 | 1346篇 |
2016年 | 1410篇 |
2015年 | 973篇 |
2014年 | 1156篇 |
2013年 | 5619篇 |
2012年 | 2098篇 |
2011年 | 2322篇 |
2010年 | 1369篇 |
2009年 | 1344篇 |
2008年 | 2009篇 |
2007年 | 1977篇 |
2006年 | 1726篇 |
2005年 | 1569篇 |
2004年 | 1540篇 |
2003年 | 1408篇 |
2002年 | 1435篇 |
2001年 | 2245篇 |
2000年 | 2152篇 |
1999年 | 1577篇 |
1998年 | 809篇 |
1997年 | 704篇 |
1996年 | 627篇 |
1995年 | 620篇 |
1994年 | 592篇 |
1993年 | 620篇 |
1992年 | 1275篇 |
1991年 | 1202篇 |
1990年 | 1207篇 |
1989年 | 1101篇 |
1988年 | 1065篇 |
1987年 | 1034篇 |
1986年 | 1052篇 |
1985年 | 1090篇 |
1984年 | 854篇 |
1983年 | 742篇 |
1982年 | 572篇 |
1979年 | 814篇 |
1978年 | 623篇 |
1975年 | 743篇 |
1974年 | 821篇 |
1973年 | 758篇 |
1972年 | 708篇 |
1971年 | 626篇 |
1969年 | 608篇 |
1968年 | 716篇 |
1967年 | 679篇 |
1966年 | 624篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
911.
This study measured students' attitudes toward a university's student health services (SHS) and identified factors that were related to their attitudes. A questionnaire surveying students' attitudes was administered to a sample of 150 students at the Oxford Campus of the University of Mississippi. Analysis of the data revealed that students' attitudes had a statistically significant correlation with the following variables: perceived medical care cost, amount of health information/education received during medical encounters, time spent in the waiting room of the SHS, sex of the student, and income of the student. There was no significant relationship between attitude and age. 相似文献
912.
The past fifteen years, in particular, have seen a major increase in the extent to which both adolescents and young adults are engaging in sexual intercourse. While several studies call attention to the increasing incidence among college/university students, the concomitant shifts in the sociopsychological realms of sexuality are also important dimensions which impact upon sexual concerns of youth. Hence, the purposes of this study are to examine the behaviors, attitudes, and concerns of students who have engaged in coitus, as well as any changes they seek in their sex lives. The sample consisted of 123 never-married male and 205 never-married female undergraduate students from a state university. The data were obtained by utilizing an anonymous questionnaire administered to volunteers during regular university classes. Among the coitally active, 67.4% of males were psychologically satisfied after their first sexual experience, but only 28.3% of females. In contrast, 80.9% of males and 28.3% of females reported current psychological satisfaction with their sexual experiences. Significant differences between genders focused on male dissatisfaction with infrequent opportunities for sexual intercourse, lack of variety of sex partners, and insufficient oral-genital stimulation, whereas females expressed concerns relating to lack of stimulation to their breasts, painful sexual intercourse, lack of orgasm during sexual intercourse, and feelings of guilt and fear. An increasing awareness of current sexual behaviors, attitudes, and concerns of university students can help family life educators to meet student needs as they react to changes in interpersonal relationships, families, and society. 相似文献
913.
The eating disorders of anorexia nervosa and bulimia are increasing in frequency among adolescent females. These increases have been linked to the cultural ideal in American society of thinness. Attempting to control weight is one behavioral manifestation of the desire for thinness. One particular group of adolescents, female cheerleaders, often experience pressure to attain and maintain weight that is lower than other adolescents of the same height. This study examined cheerleaders' desire for thinness in relationship to disordered eating and weight control behaviors. A Desire for Thinness Scale and selected scales from three eating disorders instruments were administered to 751 high school cheerleaders from the Midwest. Cheerleaders who scored in the upper third on the Desire for Thinness Scale were compared with those who scored in the lower third. Cheerleaders who expressed a strong desire for thinness had significantly higher scores (p less than .0001) on 7 of 8 eating disorders scales. The greater the desire for thinness, the more likely the tendency to report disordered eating and weight control behaviors associated with bulimia. Implications from this study include an awareness of how a cultural ideal of thinness may indirectly increase disordered eating and weight control behaviors by making weight loss a salient goal. A proactive approach to modifying negative aspects of the cultural emphasis on thinness is proposed. 相似文献
914.
Factors related to eating disorders in young adolescent girls 总被引:1,自引:0,他引:1
The objective of this study was to identify factors related to eating disorders in young adolescent girls. Three hundred eighty-five girls who were attending a career conference at a midwestern university completed the Eating Disorder Instrument (EDI) along with a biographical data sheet. The EDI is designed for the assessment of psychological and behavior traits common in eating disorders. While 81% of the young subjects were assessed to be within the range for ideal weight or were underweight, 78% preferred to weigh less. Only 14% were satisfied with their current weight. Findings for each of the subscales used revealed significant differences among the girls based on intact versus broken family; subjects' actual and preferred weight; whether the family ate meals together; average grades; age and grade in school; fathers' occupation; future career plans; place of residence; and feelings toward their mothers. 相似文献
915.
Adolescent alcoholism in Benin City, Nigeria 总被引:1,自引:0,他引:1
O A Pela 《Adolescence》1986,21(82):487-492
The consumption of alcohol by Nigerian adolescents is investigated. Adolescence and alcoholism as applied in this study are defined, and the financial costs and physical and mental effects of alcohol use are described. The author used unobtrusive methods to gather data, visiting three nightclubs and an amusement park where alcohol is served in order to observe and interview adolescents. The findings show that adolescents begin drinking at an early age and consume large quantities of beer. The findings are consistent with those of other epidemiological studies. Finally, recommendations for controlling adolescent alcohol use are made. 相似文献
916.
Variables which differentiate placement of adolescents into juvenile justice or mental health systems 总被引:2,自引:0,他引:2
Studies of the variables that determine whether an adolescent is placed in the mental health or juvenile justice system for treatment have led to conflicting conclusions based on impressionistic data. The primary hypothesis of this study--that demographic variables would and personality/psychopathology variables would not differentiate into which system a youth will be placed--was supported. Adolescents were studied at intake into both the juvenile justice system and the mental health system. Data were collected on demographics (structured interviews), personality/psychopathology (MMPI), social adjustment (CAAP), and academic achievement (PIAT). A discriminant function analysis identified eight statistically significant variables which differentiated the two groups. In order of decreasing importance they are: ethnicity, gender, MMPI-depression, previous mental health history, CAAP-productivity, drug use, parental marital history, and parental religious preference. 相似文献
917.
The authors, a college psychotherapist and dean of students, describe the relationship between these college personnel. They describe the dynamics of their interaction and the importance of communication and mutual understanding. They define counseling and therapy, discuss the issues of agency and confidentiality, suggest methods of referral and consultation, and emphasize the need for support and trust within a school community. Finally, they present case studies that illustrate the benefits of mutual trust, understanding, and respect. 相似文献
918.
919.
E A Waites 《Journal of the American Psychoanalytic Association》1986,34(3):637-662
Gifted women often find it difficult to integrate an acceptable social image with an autonomous artistic identity. This paper explores the ambitions and conflicts of Zelda Fitzgerald, who aspired to be an artist in several fields, but whose fame is largely contingent on the role she played in the life of her husband, F. Scott Fitzgerald. Zelda's flamboyant public pose, which served as a model for many of her husband's literary characters, is interpreted as an attempt to organize a consistent identity configuration by means of constant appeals for applause from an admiring audience. But although this configuration provided some stability and cohesion for her during her twenties, it was a superficial and vulnerable structure which failed to support her serious artistic aspirations. An examination of the separation conflicts and difficulties in internalization which contributed to Zelda's dilemma leads to a consideration of the role of the father in the organization of differentiated female achievements. Although Zelda Fitzgerald's pathology was extreme, her struggles suggest useful insights into the intrapsychic and social barriers commonly confronting creative women. 相似文献
920.