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   19247篇
  免费   630篇
各国政治   700篇
工人农民   1387篇
世界政治   1044篇
外交国际关系   675篇
法律   11895篇
中国共产党   1篇
中国政治   61篇
政治理论   4067篇
综合类   47篇
  2021年   79篇
  2020年   226篇
  2019年   265篇
  2018年   1504篇
  2017年   1489篇
  2016年   1322篇
  2015年   342篇
  2014年   315篇
  2013年   1162篇
  2012年   438篇
  2011年   1209篇
  2010年   1271篇
  2009年   883篇
  2008年   1021篇
  2007年   957篇
  2006年   309篇
  2005年   330篇
  2004年   433篇
  2003年   400篇
  2002年   297篇
  2001年   476篇
  2000年   439篇
  1999年   306篇
  1998年   204篇
  1997年   173篇
  1996年   152篇
  1995年   148篇
  1994年   181篇
  1993年   140篇
  1992年   204篇
  1991年   223篇
  1990年   212篇
  1989年   217篇
  1988年   207篇
  1987年   192篇
  1986年   236篇
  1985年   210篇
  1984年   169篇
  1983年   180篇
  1982年   119篇
  1981年   121篇
  1980年   88篇
  1979年   137篇
  1978年   83篇
  1977年   84篇
  1976年   73篇
  1974年   74篇
  1973年   66篇
  1972年   66篇
  1970年   46篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
The understanding of positive development across adolescence rests on having a valid and equivalent measure of this construct across the breadth of this period of life. Does the Positive Youth Development (PYD) construct based on the Five Cs model have satisfactory psychometric properties for such longitudinal measurement invariance? Using longitudinal data derived from the 4-H Study of PYD, we assessed 920 youth (61.6% female) from a racially and ethically diverse sample (67.3% European American) who participated in three waves (Grades 8–10) of data collection. Building on prior findings that the Five Cs (i.e., Competence, Confidence, Connection, Character, and Caring) model of PYD was a robust measure that could be assessed comparably during early adolescence, we tested a hierarchy of second-order confirmatory factor analysis models to assess the extent to which PYD can be measured equivalently across middle adolescence. Evidence was found for strict measurement invariance across three measurement occasions, including equivalence of first-order and second-order factor loadings, equality of intercepts of observed variables, and equality of item uniqueness and disturbances of the first-order factors. These results suggest that PYD can be measured in the same way across measurement occasions, a prerequisite for the study of development. Implications for research and application of being able to measure PYD equivalently across adolescence are discussed.  相似文献   
872.
Research on the mechanisms by which interparental conflict (IPC) affects child depression suggests that both parenting and children’s conflict appraisals play important roles, but few studies have explored the role of general cognitive style or included both parenting and cognitions in the same design. Moreover, the effects of IPC on minority children are not well understood. In this longitudinal study, parenting was examined as a mediator of the relation between increasing IPC and change in depression. General cognitive style was included as a moderator. The combined influence of parenting and cognitions was also explored. A racially and ethnically diverse sample of 88 fifth and sixth graders from two urban schools reported their cognitive style, depressive symptoms, and perceptions of conflict and parenting at two time points separated by one year. Parental warmth/rejection mediated the relation between IPC and depression, and general cognitive style acted as a moderator. Parenting, cognitive style, and IPC did not significantly interact to predict change in depression over time. Findings indicate that both parenting and children’s general cognitive style play a role in understanding the impact of increasing IPC on children’s well-being.  相似文献   
873.
Using a risk and resiliency theoretical framework, the association between interparental conflict and academic achievement was examined. The sample consisted of 2,297 6th grade youth with a mean age of 11.92. Participants were mostly European American (81.8%) and 52% were girls. Results demonstrated that interparental conflict is a risk factor for lower academic achievement, suggesting that family interactions play a significant role in how youth perform in the academic setting. Youth self-blame acted as a significant mediator, providing some explanation for how interparental conflict affects academic achievement. Maternal acceptance and monitoring knowledge partially buffered the association between interparental conflict and youth self-blame. Additionally, the positive association between interparental conflict and perceived threat was stronger for youth who perceived relationships with mothers as more supportive, connected, and involved. Results from this study underscore the need for continued focus on the link between family and school environments with respect to youth developmental outcomes.  相似文献   
874.
875.
Intentional self regulation describes how people make choices, plan actions to reach their goals, and regulate the execution of their actions, making processes of intentional self regulation central to healthy human functioning. Prior research has confirmed the presence of three processes of intentional self regulation—elective selection (ES), optimization (O), and compensation (C)—in middle adolescence (Grades 8 through 10) and concurrent and predictive relationships with measures of Positive Youth Development (PYD). A fourth process, loss-based selection (LBS), should also develop by the end of middle adolescence. The present study used data from the 4-H Study of PYD to confirm the presence of a four-scale structure of intentional self regulation (ES, O, C, and LBS) in a sample of 2,357 racially diverse Grade 10 youth (63% female) and examine its covariation with indicators of positive and problematic development. Results supported the identification of a four-part structure of intentional self regulation, and scores covaried positively with indicators of PYD and negatively with substance use, delinquency, and depressive symptoms. Implications of the findings for the understanding of self-regulatory actions in adolescence and for future research are discussed.  相似文献   
876.
877.
This essay investigates the political economy of sexuality through an interpretation of sex shows for foreigners in Bangkok, Thailand. Reading these performances as both symptoms of, and analytical commentaries on, Western consumer desire, the essay suggests the ‘pussy shows’ parody the mass production that was a hallmark of Western masculine identity under Fordism. This reading makes a case for the erotic generativity of capitalism, illuminating how Western, post-Fordist political economy of the post-1970s generated demand for these erotic services in Asia and how Western, heterosexual masculine desire is integrated into global capitalist circuits.  相似文献   
878.
This article discusses the work of Dr Mary Louisa Gordon, who was appointed as the first English Lady Inspector of Prisons in 1908, and remained in post until 1921. Her attitude towards and treatment of women prisoners, as explained in her 1922 book Penal Discipline, stands in sharp contrast to that of her male contemporaries, and the categorisation of her approach as ‘feminist’ is reinforced by her documented connections with the suffragette movement. Yet her feminist and suffragist associations also resulted in the marginalisation and dismissal of her work, such that Mary Gordon and Penal Discipline are virtually unknown today. Nevertheless, her insights into the position and needs of women prisoners retain a striking contemporary relevance.  相似文献   
879.
880.
Two cross-sectional studies investigated media influences on adolescents’ substance use and intentions to use substances in the context of exposure to parental and peer risk and protective factors. A total of 729 middle school students (n = 351, 59% female in Study 1; n = 378, 43% female in Study 2) completed self-report questionnaires. The sample in Study 1 was primarily African-American (52%) and the sample in Study 2 was primarily Caucasian (63%). Across the two studies, blocks of media-related cognitions made unique contributions to the prediction of adolescents’ current substance use and intentions to use substances in the future above and beyond self-reported peer and parental influences. Specifically, identification with and perceived similarity to media messages were positively associated with adolescents’ current substance use and intentions to use substances in the future, and critical thinking about media messages and media message deconstruction skills were negatively associated with adolescents’ intention to use substances in the future. Further, peer influence variables (e.g., peer pressure, social norms, peer substance use) acted as risk factors, and for the most part, parental influence variables (e.g., parental pressure to not use, perceived parental reaction) acted as protective factors. These findings highlight the importance of developing an increased understanding of the role of media messages and media literacy education in the prevention of substance use behaviors in adolescence.  相似文献   
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