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   30866篇
  免费   1451篇
  国内免费   5篇
各国政治   1310篇
工人农民   1412篇
世界政治   2138篇
外交国际关系   1038篇
法律   20260篇
中国共产党   8篇
中国政治   235篇
政治理论   5666篇
综合类   255篇
  2021年   158篇
  2020年   576篇
  2019年   633篇
  2018年   813篇
  2017年   884篇
  2016年   960篇
  2015年   709篇
  2014年   772篇
  2013年   3097篇
  2012年   843篇
  2011年   891篇
  2010年   814篇
  2009年   873篇
  2008年   917篇
  2007年   956篇
  2006年   938篇
  2005年   834篇
  2004年   813篇
  2003年   776篇
  2002年   750篇
  2001年   1160篇
  2000年   1016篇
  1999年   841篇
  1998年   446篇
  1997年   320篇
  1996年   367篇
  1995年   337篇
  1994年   341篇
  1993年   342篇
  1992年   554篇
  1991年   592篇
  1990年   567篇
  1989年   507篇
  1988年   559篇
  1987年   490篇
  1986年   577篇
  1985年   543篇
  1984年   429篇
  1983年   405篇
  1982年   332篇
  1981年   316篇
  1980年   251篇
  1979年   358篇
  1978年   221篇
  1977年   180篇
  1976年   163篇
  1975年   208篇
  1974年   233篇
  1973年   175篇
  1972年   170篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
ABSTRACT

Extensive research, mainly undertaken by nutrition scientists and economists, indicates that the presence of a home garden is positively associated with improved household nutrition in rural households of the global South. However, this literature is relatively silent on the contexts that influence home garden uptake. This is problematic given rapidly changing social and economic landscapes, which reshape the place and scope for home gardens within households’ livelihood and food provisioning arrangements. Original research from Myanmar reported here reveals that emergent socio-economic contexts for rural households are posing heightened challenges for home gardens to contribute to food and nutrition security.  相似文献   
942.
943.

Taking her cue from the recent Cindy Sherman exhibition at Metro Pictures, New York, 'New Photographic Work 2000', Meagher considers the ways in which feminist art critics have analysed Sherman's work since it was first 'discovered' by Douglas Crimp in 1979. Her claim is that analyses of Sherman's work are involved in a debate about whether the images are useful or destructive to feminist politics. More importantly, what has come to be known as Sherman Studies places an emphasis not upon Sherman's art, but rather upon the identify of the artist. Instead of enquiring into the political status of the art works (are they feminist?), critics often end up asking after the political status of the artist herself (is she feminist?). Meagher's essay is in four sections: 'Encounters' traces the critical reaction to Sherman's work; 'In or Out of the Picture' considers the critical tendency to impose a narrative upon the work and the simultaneous insistence that this narrative is informed by the artist's feminist intent; 'New Photographic Work 2000' looks at the most recent reactions to Sherman'swork and prepares for the final section, 'Feminist Occasions', in which Meagher draws upon Nancy Miller and considers the relationship between feminist critics and their resistant celebrity.  相似文献   
944.
This study examined community-based clinicians’ (N = 294) attitudes, background/experiences, values, and knowledge relating to issues of co-occurring disorders, which occur at a high rate among adolescents involved in the juvenile justice system. Study results reveal that clinicians self-rate their clinical values and attitudes at or above the expected level of competency, but they concede that their skill and knowledge levels are not adequate. Comparison measures reveal that employment setting conditions, geographic region, hours worked per week, and strongly held convictions about the importance of integrated mental health and substance use disorders service delivery distinguish clinicians’ co-occurring disorders knowledge levels. Implications are offered.  相似文献   
945.
Many adolescents living in contexts characterized by adversity achieve positive outcomes. We adopt a protection–risk conceptual framework to examine resilience (academic achievement, civic participation, and avoidance of risk behaviors) among 1,722 never-married 12–19 year olds living in two Kenyan urban slums. We find stronger associations between explanatory factors and resilience among older (15–19 years) than younger (12–14 years) adolescents. Models for prosocial behavior and models for antisocial behavior emerge as key predictors of resilience. Further accumulation of evidence on risk and protective factors is needed to inform interventions to promote positive outcomes among youth situated in an ecology of adversity.  相似文献   
946.
Most research on the impact of Welfare Reform has been upon the employment status of parents and trends in declining caseloads. Recent research has examined how children in Temporary Assistance to Needy Families (TANF) program families are faring, with growing interest in the effects upon children of the disruptions to cash benefits that result from program sanctions, the policies that are intended to motivate parents to comply with work requirements. Adding to the body of knowledge on children and TANF sanctions, this study used administrative data to examine school attendance rates and disruptions to enrollment, for children from families with at least one sanction. Findings indicate that there are important probable connections between the factors that contribute to challenges to employment that relate to parenting and the school engagement of children in TANF families.  相似文献   
947.
Over the course of the life of the policy of apartheid, the South African State undertook an exercise of classifying the population into different racial categories. These racial classifications were accepted by most but also disputed by many individuals who appealed to be reclassified into other categories or were forcefully reclassified. Interwoven with the processes of racial classification and objections against classification were the laws against inter-racial coupling. The police arrested and the courts prosecuted thousands of individuals for unlawful sex with persons regarded as of other races. This article employs four illustrative cases to show how a certain idea of whiteness was constituted, elaborated, and rooted. The analysis undertaken in this article is grounded on the reports carried in the annual Survey of Race Relations in South Africa about the population of South Africa in the 1960s, a period that has been referred to as the hey-day of apartheid. The article underlines the role of sexuality in the making of whiteness, linking the intention of the immorality laws with the creation of whiteness generally and dominant white masculinity specifically. The State is shown to have been a principal actor in the rendition of sexuality as constitutive of whiteness. The article concludes that over the years the idea of sexuality and sexual immorality as conveyed by the apartheid legal Acts ended up distending the conception of being white, reshaping the development of personal and social relations of whites to each other and to members of groupings.  相似文献   
948.
In this essay, the authors, all experimental filmmakers, discuss the impact of Born in Flames on their own work, as well as the ways their various projects pick up, extend, or change the political questions raised by the film. The relationships of experimental film to political community and community building are explored, particularly in the context of queer, feminist, trans, anti-racist politics and media.  相似文献   
949.
Understanding the prevalence and correlates of decisional autonomy within specific cultural contexts is necessary to fully comprehend how family processes are embedded within culture. The goals of this study were to describe mothers’ and fathers’ decision-making with adolescents (M = 12.51 years, SD = 0.58; 51% female), including parent-unilateral, joint, and youth-unilateral decision-making, and to examine the socio-cultural and family characteristics associated with these different types of decision-making in 246 Mexican-origin families. Mothers reported more joint and youth-unilateral decision-making and less parent-unilateral decision-making than did fathers. Fathers reported more youth-unilateral decision-making with sons than with daughters. Further, for mothers, more traditional gender role attitudes and higher levels of mother-adolescent conflict were associated with more parent-unilateral and less joint decision-making. In contrast, for fathers, lower levels of respect values were associated with more youth-unilateral decision-making with sons, and higher levels of parent-adolescent warmth were associated with more youth-unilateral decision-making with daughters. The importance of understanding the different correlates of mothers’ and fathers’ decision-making with sons versus daughters is discussed.  相似文献   
950.
Student engagement is an important contributor to school success, yet high school students routinely describe themselves as disengaged. Identifying factors that alter (increase) engagement is a key aspect of improving support for student achievement. This study investigated students’ perceptions of autonomy, teacher connection, and academic competence as predictors of changes in student engagement within the classroom from the start to the end of a course. Participants were 578 (58% female) diverse (67.8% White, 25.2% African American, 5.1% Hispanic, 1.2% Asian American) high school students from 34 classrooms who provided questionnaire data both at the start and the end of a single course. Novel results from a cross-lagged model demonstrated that students who perceived their classrooms as allowing and encouraging their own autonomy in the first few weeks increased their engagement throughout the course, rather than the typical decline in engagement that was demonstrated by students in other classrooms. This finding is unique in that it extended to both students’ perceptions of engagement and observations of student engagement, suggesting a fairly robust pattern. The pertinence of this finding to adolescent developmental needs and its relationship to educational practice is discussed.  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