全文获取类型
收费全文 | 1526篇 |
免费 | 62篇 |
专业分类
各国政治 | 86篇 |
工人农民 | 208篇 |
世界政治 | 111篇 |
外交国际关系 | 67篇 |
法律 | 708篇 |
中国政治 | 15篇 |
政治理论 | 383篇 |
综合类 | 10篇 |
出版年
2023年 | 10篇 |
2020年 | 12篇 |
2019年 | 32篇 |
2018年 | 34篇 |
2017年 | 41篇 |
2016年 | 42篇 |
2015年 | 32篇 |
2014年 | 39篇 |
2013年 | 215篇 |
2012年 | 53篇 |
2011年 | 64篇 |
2010年 | 39篇 |
2009年 | 51篇 |
2008年 | 61篇 |
2007年 | 54篇 |
2006年 | 68篇 |
2005年 | 56篇 |
2004年 | 53篇 |
2003年 | 50篇 |
2002年 | 50篇 |
2001年 | 33篇 |
2000年 | 36篇 |
1999年 | 26篇 |
1998年 | 14篇 |
1997年 | 24篇 |
1996年 | 26篇 |
1995年 | 23篇 |
1994年 | 24篇 |
1993年 | 20篇 |
1992年 | 23篇 |
1991年 | 27篇 |
1990年 | 20篇 |
1989年 | 20篇 |
1988年 | 23篇 |
1987年 | 16篇 |
1986年 | 14篇 |
1985年 | 19篇 |
1984年 | 14篇 |
1983年 | 9篇 |
1982年 | 15篇 |
1981年 | 8篇 |
1980年 | 11篇 |
1979年 | 14篇 |
1978年 | 11篇 |
1977年 | 11篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1974年 | 8篇 |
1973年 | 7篇 |
1971年 | 5篇 |
排序方式: 共有1588条查询结果,搜索用时 15 毫秒
881.
Jon M. Hussey Lewayne D. Gilchrist Mary Rogers Gillmore Mary Jane Lohr 《Journal of youth and adolescence》1992,21(4):409-420
Previous research suggests that maternal smoking during pregnancy remains prevalent, particularly among adolescents. However, little is known about the factors related to smoking during adolescent pregnancy. The goal of the present study is to identify intrapersonal, familial, and peer factors that are related to smoking during adolescent pregnancy, and to determine the relative degree to which they affect this behavior. Interviews were conducted with 241 unmarried pregnant adolescents who planned to carry their pregnancies to term. Consistent with previous studies, 27% of the respondents reported daily smoking during pregnancy, and whites reported higher rates of use than members of other racial groups. Smoking during adolescent pregnancy was related to intrapersonal, familial, and peer factors. The results of a regression analysis suggest that perceived parental disapproval of smoking during pregnancy, friends' cigarette use, and race play a particularly important role in this behavior. The implications of these findings for preventive programs are discussed.Research reported here and the preparation of this report were supported by Grant DA-05208 from the National Institute on Drug Abuse.Received M.A. in sociology from the University of Washington. Research interests include health behaviors, and the relationship between social stratification and health.Received Ph.D. in social welfare from the University of Washington. Research interests are in adolescent development, gender issues in adolescent development, and health promotion and problem prevention with children and adolescents. Received Ph.D. in sociology from the University of Washington. Research interests are adolescent problem behaviors, and particularly adolescent sexual decision making.Received M.S. in educational psychology from the University of Wisconsin—Madison. Research interests: adolescent substance use, pregnancy and parenthood, and peer relations. 相似文献
882.
Mary Cowan Viernstein Peter V. McGinn Robert Hogan 《Journal of youth and adolescence》1977,6(2):169-178
This paper describes the personality correlates of differential verbal and mathematical ability in very bright adolescent boys (N=182). The results indicate that there are few mean personality differences between two groups of boys formed on the basis of high scores on measures of either verbal or quantitative ability. On the other hand, within each of these groups there are dependable personality correlates of differences between verbal and quantitative ability. In particular, boys with high verbal relative to their quantitative scores seem independent, rational, reflective, and mature, regardless of their vocational or academic preferences.Work on this paper was supported by a grant from the Spencer Foundation, Chicago, Illinois.Received her Ph.D. in psychology from the Johns Hopkins University. Major interests are personality theory and medical psychology.Received his Ph.D. in psychology from the Johns Hopkins University. Major interests are education and developmental psychology.Received his Ph.D. in psychology from the University of California at Berkeley. Major interests are personality theory and moral development. 相似文献
883.
884.
885.
886.
887.
888.
889.
Miller-Johnson Shari Costanzo Philip R. Coie John D. Rose Mary R. Browne Dorothy C. Johnson Courtney 《Journal of youth and adolescence》2003,32(5):375-384
This study investigated associations between peer status, peer group social influences, and risk-taking behaviors in an urban sample of 647 African American seventh-grade students. The highest rates of problem behaviors were seen in the controversial peer status group, or those youth who were both highly liked and highly disliked by other youth. Findings also revealed contrasting patterns of peer group leadership. The more conventional, positive leadership style predicted lower rates, and the less mainstream, unconventional style predicted higher rates of involvement in problem behaviors. Conventional leaders were most likely to be popular status youth, while unconventional leaders were mostly to be both controversial and popular status youth. Controversial status youth were also more likely to be involved in deviant peer groups. Results highlight the importance of controversial status students as key influence agents during early adolescence. We discuss the implications of these results for preventive interventions to reduce adolescent problem behaviors. 相似文献
890.
Meg Russell 《The Political quarterly》2003,74(3):311-318