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   22020篇
  免费   294篇
  国内免费   27篇
各国政治   523篇
工人农民   1282篇
世界政治   402篇
外交国际关系   1468篇
法律   8164篇
中国共产党   1223篇
中国政治   3058篇
政治理论   2494篇
综合类   3727篇
  2024年   1篇
  2023年   9篇
  2022年   122篇
  2021年   301篇
  2020年   308篇
  2019年   120篇
  2018年   1356篇
  2017年   1387篇
  2016年   1092篇
  2015年   341篇
  2014年   385篇
  2013年   560篇
  2012年   844篇
  2011年   1905篇
  2010年   2249篇
  2009年   1875篇
  2008年   1905篇
  2007年   2066篇
  2006年   1404篇
  2005年   1209篇
  2004年   654篇
  2003年   619篇
  2002年   539篇
  2001年   445篇
  2000年   165篇
  1999年   96篇
  1998年   48篇
  1997年   42篇
  1996年   41篇
  1995年   44篇
  1994年   44篇
  1993年   20篇
  1992年   20篇
  1991年   18篇
  1990年   17篇
  1989年   11篇
  1988年   12篇
  1987年   7篇
  1986年   9篇
  1985年   1篇
  1984年   11篇
  1983年   8篇
  1982年   5篇
  1981年   3篇
  1980年   1篇
  1979年   5篇
  1978年   7篇
  1977年   9篇
  1975年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
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   
932.
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   
933.
934.
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   
935.
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   
936.
The current study examined concurrent and longitudinal predictors of early adolescents’ involvement in Internet aggression. Cross-sectional results (N = 330; 57% female) showed that the likelihood of reporting Internet aggression was higher among youth who spent more time using Internet-based technologies to communicate with friends and who were themselves targets of Internet aggression. Offline relational aggression and beliefs supportive of relational and physical aggression also predicted concurrent involvement in Internet aggression. We used longitudinal data (N = 150; 51% female) to distinguish between youth who were aggressive in traditional contexts only (i.e., school) from those who were aggressive both online and offline. These results indicated that youth who were aggressive both online and offline were older at the initial assessment, were targets of Internet aggression, and held beliefs more supportive of relational aggression than youth who were aggressive offline only. Implications and directions for future research are discussed.  相似文献   
937.
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   
938.
939.
This study examined the effects of neighborhood context on juvenile recidivism to determine if neighborhoods influence the likelihood of reoffending. Although a large body of literature exists regarding the impact of environmental factors on delinquency, very little is known about the effects of these factors on juvenile recidivism. The sample analyzed includes 7,061 delinquent male juveniles committed to community-based programs in Philadelphia, of which 74% are Black, 13% Hispanic, and 11% White. Since sample youths were nested in neighborhoods, a hierarchical generalized linear model was employed to predict recidivism across three general categories of recidivism offenses: drug, violent, and property. Results indicate that predictors vary across the types of offenses and that drug offending differs from property and violent offending. Neighborhood-level factors were found to influence drug offense recidivism, but were not significant predictors of violent offenses, property offenses, or an aggregated recidivism measure, despite contrary expectations. Implications stemming from the finding that neighborhood context influences only juvenile drug recidivism are discussed.  相似文献   
940.
This study used data from a sample of 6th to 12th grade students (N = 48,641, 51% female), nested in 192 schools, to determine if the influence of family-based protective factors varied across different school contexts. Hierarchical logistic regression models were used to examine the effects of individual-level family protective factors, relative to school-level aggregates of the same factors, on recent (past 30 days) use of cigarettes, alcohol, and marijuana. Cross-level interactions indicated that the effect of the student’s level of family protection, relative to other students in their school, differed depending on the aggregated school level of family protection. The results suggested that the benefit of belonging to a well-functioning family was more influential for students attending schools characterized by higher-than-average aggregated levels of protection compared to students attending schools of lower-than-average protection. Thus, family-level factors offered less protection for students in relatively high-risk school contexts. These results were consistent with a protective–reactive interaction and suggest that a thorough understanding of adolescent substance use must consider the complex interplay among adolescents, their families, and their social environments.  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