全文获取类型
收费全文 | 10025篇 |
免费 | 118篇 |
国内免费 | 8篇 |
专业分类
教育 | 7050篇 |
科学研究 | 1134篇 |
各国文化 | 67篇 |
体育 | 654篇 |
综合类 | 4篇 |
文化理论 | 60篇 |
信息传播 | 1182篇 |
出版年
2022年 | 60篇 |
2021年 | 113篇 |
2020年 | 157篇 |
2019年 | 212篇 |
2018年 | 332篇 |
2017年 | 311篇 |
2016年 | 318篇 |
2015年 | 183篇 |
2014年 | 310篇 |
2013年 | 1730篇 |
2012年 | 246篇 |
2011年 | 277篇 |
2010年 | 232篇 |
2009年 | 213篇 |
2008年 | 263篇 |
2007年 | 226篇 |
2006年 | 208篇 |
2005年 | 183篇 |
2004年 | 202篇 |
2003年 | 147篇 |
2002年 | 150篇 |
2001年 | 221篇 |
2000年 | 228篇 |
1999年 | 196篇 |
1998年 | 106篇 |
1997年 | 150篇 |
1996年 | 127篇 |
1995年 | 96篇 |
1994年 | 114篇 |
1993年 | 98篇 |
1992年 | 188篇 |
1991年 | 152篇 |
1990年 | 140篇 |
1989年 | 162篇 |
1988年 | 148篇 |
1987年 | 124篇 |
1986年 | 121篇 |
1985年 | 124篇 |
1984年 | 94篇 |
1983年 | 104篇 |
1982年 | 77篇 |
1981年 | 90篇 |
1980年 | 78篇 |
1979年 | 112篇 |
1978年 | 74篇 |
1977年 | 74篇 |
1976年 | 67篇 |
1974年 | 66篇 |
1973年 | 60篇 |
1972年 | 54篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Mamathole Margaret Lediga 《Public Library Quarterly》2018,37(3):296-305
ABSTRACTThe information and knowledge society has resulted in the exponential growth of information and communication technologies (ICTs), thus creating a gap between those who use ICTs and those who do not; hence the emergence of the term “digital divide” in the 1990s. One of the milestones of South Africa’s National Development Plan, a policy that charts the country’s development up until 2030, is to ensure that high-speed broadband internet is universally available at competitive prices. Notwithstanding the importance of ICTs in public libraries, the provision of such is still taking place on a limited scale in South Africa. This article investigates the use of ICTs in public libraries in South Africa as a tool in bridging the digital divide. It also examines the inequalities in access and use and suggests ways in which ICTs may be used to reduce the digital divide. A qualitative research methodology was adopted. In order for public libraries to function as an important tool in bridging the digital divide, there is a need to standardize the provision of public library services with regard to the digital divide. 相似文献
52.
53.
Veronika Karnowski Larissa Leonhard Anna Sophie Kümpel 《Communication Research Reports》2018,35(2):91-100
Social media have become an integral part of online news use, affecting how individuals find, consume, and share news. By applying the Theory of Reasoned Action (TRA), this study investigates the effects of motives, attitude, and intention on news-sharing behavior among German social media users (n = 333). Findings show that news-sharing attitude and subjective norms have a positive effect on news-sharing intention, which in turn has a positive effect on actual news-sharing behavior. Taken together, we see that a new media behavior in the early phases of its societal diffusion—like social media news sharing in Germany in 2015—can mainly be explained by a rational choice logic and is rooted in the motives of socializing and information seeking. This finding thus reflects the double nature of social media as a means for both information retrieval and social grooming. 相似文献
54.
55.
56.
57.
B. G. C. Maisonneuve T. Honegger J. Cordeiro O. Lecarme T. Thiry D. Fuard K. Berton E. Picard M. Zelsmann D. Peyrade 《Biomicrofluidics》2016,10(2)
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks. 相似文献
58.
The authors examined the relationship between stress, adaptive coping, and life satisfaction among college students who reported having a friend or family member with eating disorder symptomatology. A hierarchical regression confirmed the study's hypotheses. Higher stress was linked with less life satisfaction. After stress was controlled, plan coping had a beneficial influence on life satisfaction. College counselors can use these findings when choosing interventions for clients who are close to someone with an eating disorder. 相似文献
59.
60.