首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   73498篇
  免费   2805篇
  国内免费   39篇
  76342篇
  2020年   771篇
  2019年   939篇
  2018年   1302篇
  2017年   1342篇
  2016年   1428篇
  2015年   987篇
  2014年   1185篇
  2013年   6056篇
  2012年   2155篇
  2011年   2335篇
  2010年   1377篇
  2009年   1406篇
  2008年   2135篇
  2007年   2039篇
  2006年   1809篇
  2005年   1672篇
  2004年   1619篇
  2003年   1523篇
  2002年   1580篇
  2001年   2253篇
  2000年   2145篇
  1999年   1634篇
  1998年   870篇
  1997年   762篇
  1995年   685篇
  1992年   1381篇
  1991年   1316篇
  1990年   1304篇
  1989年   1225篇
  1988年   1141篇
  1987年   1141篇
  1986年   1172篇
  1985年   1242篇
  1984年   1014篇
  1983年   911篇
  1982年   707篇
  1981年   706篇
  1979年   1026篇
  1978年   772篇
  1976年   696篇
  1975年   934篇
  1974年   1028篇
  1973年   1009篇
  1972年   903篇
  1971年   813篇
  1970年   759篇
  1969年   769篇
  1968年   982篇
  1967年   941篇
  1966年   861篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
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   
992.
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   
993.
R L Calabrese  H Schumer 《Adolescence》1986,21(83):675-687
This research evaluated the effects of involvement of adolescents in community service activities on levels of alienation. It was proposed that alienation could be reduced through the implementation of a model which utilized community service activities to facilitate adolescent access to adult society, development of responsibility, collaborative and cooperative work, and control over planning and outcomes. It is suggested that adolescent involvement in service activities can produce positive benefits, among which are reduced levels of alienation, improved school behavior, improved grade point average, and acceptance by the adult community. These findings also suggest that females respond more positively to school when allowed to problem-solve collectively and collaboratively.  相似文献   
994.
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   
995.
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   
996.
H Svec 《Adolescence》1986,21(82):449-452
The literature supports the theory that high school dropouts are unable to find employment when they leave school, and that girls who dropout are more likely than boys to return. It was hypothesized that schools may not want to take back students who had once dropped out of school. To investigate the schools' response to dropouts trying to return, three actors were used to portray a male dropout, a female dropout and a parent of a dropout. Fifteen schools were contacted, to determine the differences in response to each actor. The results indicate that schools were more likely to accept the child who is represented by the parent, and that schools reacted more favorably to the parent. The results are discussed and specific recommendations made for program and practice.  相似文献   
997.
H E Mendelberg 《Adolescence》1986,21(81):215-224
Mexican-American adolescents of migrant origin present conflicting attitudes in their selection of ideal characters and images for identification. As minority members, identification with members of outside groups appears blocked for them. At the same time, encounters with outside society seem to undermine identification processes that develop within their own group, their families, and community. This study concludes that relationships of dominance and dependence in the outside society foster inhibitions to the process of identification, and disturbances in the mechanisms of defense in the minority member. These relationships seem to interfere with the internalization and adoption of significant others' characteristics and attitudes.  相似文献   
998.
999.
1000.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号