全文获取类型
收费全文 | 6610篇 |
免费 | 194篇 |
专业分类
各国政治 | 361篇 |
工人农民 | 314篇 |
世界政治 | 445篇 |
外交国际关系 | 299篇 |
法律 | 4071篇 |
中国政治 | 33篇 |
政治理论 | 1250篇 |
综合类 | 31篇 |
出版年
2023年 | 48篇 |
2022年 | 37篇 |
2021年 | 47篇 |
2020年 | 106篇 |
2019年 | 134篇 |
2018年 | 199篇 |
2017年 | 188篇 |
2016年 | 208篇 |
2015年 | 147篇 |
2014年 | 160篇 |
2013年 | 702篇 |
2012年 | 246篇 |
2011年 | 240篇 |
2010年 | 161篇 |
2009年 | 196篇 |
2008年 | 201篇 |
2007年 | 216篇 |
2006年 | 174篇 |
2005年 | 134篇 |
2004年 | 148篇 |
2003年 | 154篇 |
2002年 | 146篇 |
2001年 | 246篇 |
2000年 | 252篇 |
1999年 | 173篇 |
1998年 | 71篇 |
1997年 | 69篇 |
1996年 | 67篇 |
1995年 | 60篇 |
1994年 | 64篇 |
1993年 | 56篇 |
1992年 | 126篇 |
1991年 | 113篇 |
1990年 | 143篇 |
1989年 | 129篇 |
1988年 | 140篇 |
1987年 | 133篇 |
1986年 | 106篇 |
1985年 | 108篇 |
1984年 | 87篇 |
1983年 | 80篇 |
1982年 | 59篇 |
1981年 | 49篇 |
1980年 | 40篇 |
1979年 | 55篇 |
1978年 | 39篇 |
1976年 | 30篇 |
1975年 | 28篇 |
1974年 | 40篇 |
1973年 | 29篇 |
排序方式: 共有6804条查询结果,搜索用时 15 毫秒
201.
202.
de Graaf H van de Schoot R Woertman L Hawk ST Meeus W 《Journal of youth and adolescence》2012,41(5):583-592
Although the relation between family relationships and the timing of sexual debut has been the focus of many studies, research
on mediating factors is scarce. This study examines whether low levels of family cohesion result in an earlier onset of romantic
and sexual experiences, and whether the link between family cohesion and an early sexual debut is mediated by early romantic
initiation. A longitudinal sample of 314 adolescent girls and 222 boys, aged 12–17 at Wave 1, completed questionnaires at
three measurement points with three year intervals. The results showed that sexual debut followed romantic initiation for
77% of the participants. For early adolescent females (aged 12–14), high levels of family cohesion resulted in a later sexual
debut and this association was fully mediated by a delay of romantic initiation. Among boys and older girls, timing of romantic
initiation did not mediate the link between family cohesion and timing of sexual initiation. Early adolescent girls who have
negative relationships with their parents turn to romantic relationships for intimacy and support, which subsequently provide
the opportunity for an early sexual debut. Low levels of family cohesion thus primarily precipitate romantic initiation and
sexual initiation appears to be secondary to this process among girls in this age group. 相似文献
203.
Nanette S. Danielsson Allison G. Harvey Shane MacDonald Markus Jansson-Fröjmark Steven J. Linton 《Journal of youth and adolescence》2013,42(8):1223-1233
Depression is a common and debilitating disorder in adolescence. Sleep disturbances and depression often co-occur with sleep disturbances frequently preceding depression. The current study investigated whether catastrophic worry, a potential cognitive vulnerability, mediates the relationship between adolescent sleep disturbances and depressive symptoms, as well as whether there are gender differences in this relationship. High school students, ages 16–18, n = 1,760, 49 % girls, completed annual health surveys including reports of sleep disturbance, catastrophic worry, and depressive symptoms. Sleep disturbances predicted depressive symptoms 1-year later. Catastrophic worry partially mediated the relationship. Girls reported more sleep disturbances, depressive symptoms, and catastrophic worry relative to boys. The results, however, were similar regardless of gender. Sleep disturbances and catastrophic worry may provide school nurses, psychologists, teachers, and parents with non-gender specific early indicators of risk for depression. Several potentially important practical implications, including suggestions for intervention and prevention programs, are highlighted. 相似文献
204.
Christine Jackson Susan T. Ennett Denise M. Dickinson J. Michael Bowling 《Journal of youth and adolescence》2013,42(11):1687-1695
Sipping alcohol during childhood may be a marker of differentiation as regards children’s future risk of underage drinking; yet very little is known about alcohol use when it occurs among elementary school-aged children. The purpose of the present study is to examine alcohol sipping behavior in a sample of third-grade school children to learn whether sipping is associated with attributes that could increase children’s likelihood of further underage drinking. We collected telephone interview data from 1,050 mothers and their third grade children (mean age 9.2 years; 48.2 % male) residing in the Southeastern United States. The majority of mothers were White non-Hispanic (69.02 %) or Black non-Hispanic (21.3 %); most (85 %) lived in households shared with fathers or other adult caretakers. We hypothesized that children who sip alcohol would score lower than abstinent peers on indicators of competence and score higher on indicators of exposure to alcohol-specific socialization by parents and peers. A multivariate model controlling for frequency of parent alcohol use and demographic covariates showed that children who had sipped alcohol were significantly less likely than abstinent peers to affirm indicators of competence and significantly more likely to affirm indicators of exposure to alcohol specific socialization by parents and by same age peers. These preliminary findings suggest that developmental attributes associated with risk of underage drinking begin to differentiate at least as young as middle childhood. Research is needed to test prospectively for continuity between alcohol risk attributes present in middle childhood and future alcohol use. 相似文献
205.
Vangie A. Foshee Thad S. Benefield Heath Luz McNaughton Reyes Susan T. Ennett Robert Faris Ling-Yin Chang Andrea Hussong Chirayath M. Suchindran 《Journal of youth and adolescence》2013,42(4):471-486
The peer context is a central focus in research on adolescent risk behaviors but few studies have investigated the role of the peer context in the perpetration of adolescent dating violence. This longitudinal study examined between-subjects and within-person contemporaneous and lagged effects of peer attributes, measured with social network analyses, on trajectories of dating violence perpetration and determined if effects varied by grade and/or sex of the adolescent. Data are from adolescents who participated in a five-wave panel study beginning when they were in 7 through 9th grade and ending when they were in 10 through 12th grade (n = 3,412); half were male, 40.5 % were white, 49.9 % were black and 10.4 % were of another race/ethnicity. Significant between-subjects effects indicate that adolescents who typically have friends who use dating violence, and girls who are typically high in social status, are at increased risk for using dating violence throughout adolescence. Adolescents who typically have high quality friendships and girls who typically have friends with pro-social beliefs are at decreased risk for using dating violence throughout adolescence. Significant within-person contemporaneous effects indicate that both boys and girls reported lower levels of dating violence than usual at times when they had more friends with pro-social beliefs, and reported higher levels of dating violence than usual at times when they had higher social status. None of the lagged effects were significant and none of the effects varied across grade. These findings suggest that the peer context plays an important role in the development of the perpetration of adolescent dating violence. 相似文献
206.
Understanding party competition as a ‘political market’, we explore its characteristics during the second Merkel government, 2009–13. On the demand side, analysing opinion polls and the Länder election results, we find that the outcome of the next Bundestag election was uncertain. Thus, electoral competition was likely to be intense. On the supply side, opposition parties presented credible alternatives to government policies with regard to social as well as environmental policy. Regarding the Euro crisis, however, a consensus across the established parties existed. Studying three of the most salient policy issues, we identify party competition as a crucial determinant of decision-making. While the debate on minimum wages was substantially shaped by party competition, resulting in ‘anticipatory obedience’, nuclear energy only became affected by electoral considerations after the ‘Fukushima shock’ which resulted in a major policy shift. Regarding the response to the Euro crisis, however, party competition was essentially suspended. 相似文献
207.
Connor T. Jerzak 《International Journal of Politics, Culture, and Society》2014,27(3):367-388
This analysis tackles the question of whether the democratic deficit in the European Union is associated with repeated referendums—giving voters a second chance to vote “yes” for EU treaties. Looking at repeated referendums in Ireland on the Nice and Lisbon treaties, I argue that, broadly speaking, these referendums failed to give Irish voters the meaningful ability to contest the direction of EU policy or to choose among alternative policy options, an example of how the democratic deficit can endure even when the EU incorporates electoral mechanisms. I first discuss how this theoretical insight is evidenced by five aspects of the Irish referendums. Then, I examine three of these aspects more closely in case studies of the Nice and Lisbon referendums, focusing on how leaders (1) conceptualized the failure of the initial referendums as deriving from voter incomprehension, (2) planned repeated referendums in an additional effort to ratify the treaties, and (3) mobilized “yes” voters through extreme predictions about the consequences of second “no” outcomes. I conclude by discussing socio-economic trends seen from 2003 to 2014 and their implications for issues related to the EU’s democratic deficit. 相似文献
208.
Although many scholars of Central and Eastern Europe politics write about the relative weaknesses of civil societies, some studies delivered evidence of cases where interest groups were able to influence particular decisions and policies. Therefore, we aimed at identifying and examining the most influential national interest groups of eight different policy areas in post-communist Hungary hoping to explore the reasons for their success. Older generations of organisations benefit from political embeddedness, while newer advocacy groups rely more on legal instruments and public mobilisation. The operation of successful groups has not been affected by the strong political polarisation of the Hungarian party system. 相似文献
209.
Carolina T. Maciel 《Contemporary Politics》2015,21(4):435-450
As a sensitive area in international trade, animal welfare measures have encountered resistance in negotiations at the World Trade Organization (WTO). Consequently, alternative avenues have been pursued to reach international trade policy convergence. To further understand the contemporary trade politics of animal welfare, an empirical investigation was conducted on the interplay between European and Brazilian actors in the context of livestock production. By drawing upon diplomatic studies and the global governance literature, this study identifies and analyses initiatives that parallel the WTO approach and through which the development and implementation of mutually acceptable farm animal welfare measures have been pursued. Research findings indicate that a constellation of international non-diplomatic actors are currently engaged in influencing the future development of farm animal welfare measures. Among the initiatives that enable the alignment of European and Brazilian animal welfare policies and practices, there are soft instruments such as knowledge sharing and private standards. The rise of new actors and the use of soft instruments have been, to a certain extent, able to mitigate the tardiness of a WTO consensus regarding the use of animal welfare measures. However, there are concerns that the use of private standards has become a shortcut to circumvent the rigours of the multilateral trading system. This concern deserves a closer look because instead of paving the way, private standards may hamper trade relations which in turn hamper progress in animal welfare matters. 相似文献
210.
Carin Björngren Cuadra 《Journal of immigrant & refugee studies》2015,13(3):302-320
The aim is to explore experiences and considerations of social workers regarding irregular migrants, understood as being prone to be “collateral damage.” It is revealed that some social workers approve assistance exceeding that which can find support in the national legislation. They are hereby addressing the normative conditions for recognition and installing new frames for apprehending irregular migrants. This process is referred to as a reframing of recognizability. By exceeding the limits of “belonging,” social workers question their profession's national link as well as the inability of a nationally anchored understanding of social work to deal with irregular migrants. 相似文献