全文获取类型
收费全文 | 8841篇 |
免费 | 258篇 |
专业分类
各国政治 | 448篇 |
工人农民 | 402篇 |
世界政治 | 506篇 |
外交国际关系 | 262篇 |
法律 | 5603篇 |
中国共产党 | 3篇 |
中国政治 | 57篇 |
政治理论 | 1742篇 |
综合类 | 76篇 |
出版年
2020年 | 108篇 |
2019年 | 143篇 |
2018年 | 204篇 |
2017年 | 221篇 |
2016年 | 215篇 |
2015年 | 150篇 |
2014年 | 153篇 |
2013年 | 966篇 |
2012年 | 230篇 |
2011年 | 228篇 |
2010年 | 191篇 |
2009年 | 213篇 |
2008年 | 261篇 |
2007年 | 223篇 |
2006年 | 257篇 |
2005年 | 227篇 |
2004年 | 231篇 |
2003年 | 204篇 |
2002年 | 215篇 |
2001年 | 266篇 |
2000年 | 267篇 |
1999年 | 193篇 |
1998年 | 119篇 |
1997年 | 121篇 |
1996年 | 111篇 |
1995年 | 99篇 |
1994年 | 96篇 |
1993年 | 112篇 |
1992年 | 184篇 |
1991年 | 200篇 |
1990年 | 180篇 |
1989年 | 181篇 |
1988年 | 162篇 |
1987年 | 180篇 |
1986年 | 176篇 |
1985年 | 164篇 |
1984年 | 157篇 |
1983年 | 167篇 |
1982年 | 96篇 |
1981年 | 91篇 |
1980年 | 77篇 |
1979年 | 106篇 |
1978年 | 76篇 |
1977年 | 74篇 |
1976年 | 60篇 |
1975年 | 59篇 |
1974年 | 63篇 |
1973年 | 73篇 |
1972年 | 63篇 |
1968年 | 53篇 |
排序方式: 共有9099条查询结果,搜索用时 15 毫秒
261.
262.
The eyes of fourteen fatally abused children and sixteen control cases were examined histopathologically. Ten of the abused children showed intraocular change. The most common ocular changes were subdural hemorrhage of the optic nerve and retinal hemorrhage which involved all the layers of the retina, but most commonly the nerve fiber layer, ganglion cell layer and inner nuclear layer. The presence of blood cavities within the retina partially supported the hypothesis of traumatic retinoschisis. The control cases of non-abused children rarely showed intraocular hemorrhage. 相似文献
263.
J E Allard 《Journal - Forensic Science Society》1992,32(1):49-58
Lorraine Benson's body was found beaten and strangled at Raynes Park, Surrey, in December 1988. Considering the possibility of linked offences, a murder squad was set up to work alongside a team already investigating a rape series in the Kingston area. A man's handkerchief left at a site a quarter of a mile from the murder scene was found to be stained with blood and saliva matching that of the victim. A DNA profile was obtained from a stain of nasal mucus on this handkerchief and found to match a suspect later arrested for an attempted rape in the same locality. Also of forensic interest were dust marks made by the zips of the victim's and defendant's coats and identification of the rope used for strangulation. 相似文献
264.
E. M. Miltenburg H. G. van de Werfhorst S. Musterd K. Tieskens 《Housing Policy Debate》2018,28(4):609-634
Policymakers have actively pursued urban renewal and dispersal programs to deconcentrate poverty in urban neighborhoods. Relocation strategies lead to new housing opportunities and may encourage employment opportunities for relocated residents if resourceful contacts and job information become more easily available after the move. This study provides an innovative evaluation of the early impacts of involuntary relocation programs in the Netherlands on the housing careers, earnings and employment rates of forced relocatees. It establishes a quasi-experimental design by employing unique longitudinal individual-level population registry data from Statistics Netherlands: forced relocatees are tracked and matched to a control group consisting of similar residents that were not forced to move. A difference-in-difference design shows that forced relocatees are living in less deprived neighborhoods after the move. However, we find no conclusive evidence that this upgrade in housing leads to more socioeconomic opportunities for the forced relocatees. 相似文献
265.
Florian Justwan Bert Baumgaertner Juliet E. Carlisle April K. Clark Michael Clark 《Journal of Elections, Public Opinion & Parties》2018,28(4):424-442
There is widespread evidence that individuals select information that supports their convictions and worldviews. This behavior yields the formation of echo chambers – environments in which an individual’s own political beliefs are repeated and amplified and dissenting opinions are screened out. Recent research demonstrates that social networking sites such as Facebook or Twitter can facilitate this selection into homogenous networks. Using data from a representative nation-wide online survey, we consider the degree to which respondents’ social media networks resemble virtual echo chambers. We then analyze the effect of these social media echo chambers on satisfaction with democracy among Democrats and Republicans in the aftermath of the 2016 US elections. Our findings reveal that virtual echo chambers boost democratic satisfaction among Republicans but they do not have an effect on system support by self-identified Democrats. Our paper therefore adds to a growing literature linking online behaviors to mass attitudes about politics. 相似文献
266.
267.
Participatory governance offers the potential to deliver responsive and accountable services. This article tests this expectation by looking at how members of participatory extension platforms in Malawi understand the meaning of “demand-driven” services, and allocate responsibility and influence in service provision. Results show that most respondents agree on bottom-up extension services that respond to expressed farmers’ needs (86% of respondents), and assign responsibility and influence widely across state and non-state actors. While these findings suggest that these participatory mechanisms can promote responsiveness to farmers’ needs and accountability, they also point toward different governance challenges in extension services. 相似文献
268.
E. Fouksman 《Third world quarterly》2017,38(8):1847-1872
What role have the processes and institutions of international development played in creating and propagating ideas around the world? This paper demonstrates that networks of development-focused civil society institutions can form global epistemic bridges even where communication technology, global markets, infrastructure, or state services do not reach. Given the penetration of these ‘civil society knowledge networks’ throughout the world, it is crucial to understand how these networks form, and how they create and spread ideas, mediating between global discourses and local needs. This paper builds on a multi-sited case study of one such civil society knowledge network, which includes an international foundation, its partner non-governmental organisations (NGOs) in Kenya, and one village where these NGOs run a forest conservation project. The case study provides a closely textured analysis of the mechanisms of knowledge production and consumption in the network, including personality politics, language, technology, political connections and the power dynamics of knowledge flows. It demonstrates the ways remoteness and disconnection are overcome through the epistemic reach of institutional networks involved in development interventions. 相似文献
269.
270.
Aprile D. Benner Alaina E. Boyle Farin Bakhtiari 《Journal of youth and adolescence》2017,46(10):2129-2142
The transition to high school is disruptive for many adolescents, yet little is known about the supportive relational processes that might attenuate the challenges students face as they move from middle to high school, particularly for students from more diverse backgrounds. Identifying potential buffers that protect youth across this critical educational transition is important for informing more effective support services for youth. In this study, we investigated how personal characteristics (gender, nativity, parent education level) and changes in support from family, friends, and school influenced changes in socioemotional adjustment and academic outcomes across the transition from middle to high school. The data were drawn from 252 students (50% females, 85% Latina/o). The results revealed declines in students’ grades and increases in depressive symptoms and feelings of loneliness across the high school transition, with key variation by student nativity and gender. Additionally, stable/increasing friend support and school belonging were both linked to less socioemotional disruptions as students moved from middle to high school. Increasing/stable school belonging was also linked to increases in school engagement across the high school transition. These findings suggest that when high school transitions disrupt supportive relationships with important others in adolescents’ lives, adolescents’ socioemotional well-being and, to a lesser extent, their academic engagement are also compromised. Thus, in designing transition support activities, particularly for schools serving more low-income and race/ethnic minority youth, such efforts should strive to acclimate new high school students by providing inclusive, caring environments and positive connections with educators and peers. 相似文献