全文获取类型
收费全文 | 14502篇 |
免费 | 128篇 |
国内免费 | 13篇 |
专业分类
教育 | 9573篇 |
科学研究 | 2418篇 |
各国文化 | 143篇 |
体育 | 967篇 |
综合类 | 6篇 |
文化理论 | 115篇 |
信息传播 | 1421篇 |
出版年
2021年 | 115篇 |
2020年 | 162篇 |
2019年 | 257篇 |
2018年 | 343篇 |
2017年 | 315篇 |
2016年 | 274篇 |
2015年 | 188篇 |
2014年 | 249篇 |
2013年 | 2848篇 |
2012年 | 262篇 |
2011年 | 256篇 |
2010年 | 224篇 |
2009年 | 227篇 |
2008年 | 224篇 |
2007年 | 223篇 |
2006年 | 201篇 |
2005年 | 182篇 |
2004年 | 181篇 |
2003年 | 173篇 |
2002年 | 169篇 |
2001年 | 210篇 |
2000年 | 231篇 |
1999年 | 195篇 |
1998年 | 133篇 |
1997年 | 131篇 |
1996年 | 157篇 |
1995年 | 130篇 |
1994年 | 148篇 |
1993年 | 141篇 |
1992年 | 193篇 |
1991年 | 191篇 |
1990年 | 184篇 |
1989年 | 202篇 |
1988年 | 166篇 |
1987年 | 164篇 |
1986年 | 198篇 |
1985年 | 208篇 |
1984年 | 168篇 |
1983年 | 165篇 |
1982年 | 164篇 |
1981年 | 129篇 |
1980年 | 149篇 |
1979年 | 181篇 |
1978年 | 148篇 |
1977年 | 132篇 |
1976年 | 136篇 |
1975年 | 112篇 |
1974年 | 133篇 |
1973年 | 117篇 |
1971年 | 124篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Broad and discipline-specific information literacy competencies must be mastered by science, technology, engineering, and math (STEM) students. This study assessed changes in student perceptions of their competency in information literacy after continuous efforts in course curriculum. Data were gathered in 2015–2016 from first year interdisciplinary project-based courses with STEM students to assess changes in information literacy competencies. Analyses suggested there was a significant increase in students' perception of their familiarity with library resources, search strategies, citation use, and ability to evaluate source quality. There was no change in their perception of their ability to evaluate the variety of source and source relevance and a decrease in their perception of the ethical use of information. With faculty-librarian partnership and integrated instruction in a first year course, students showed the largest perceived increases in foundational information literacy skills but struggled with information literacy abilities. This study provides a baseline of information literacy competencies of first year students and provides recommendations for continuing education. 相似文献
62.
The information practices of collaborative interdisciplinary researchers, especially in distributed environments, remain understudied. Embracing the naturalistic paradigm, this qualitative case study relies upon semi-structured interviews, snowball sampling, and grounded analysis. Based on interviews with 53 participants from 11 Digging Into Data 3 (DID3, 2014-2016) projects, this study examines the working practices of scholars (library and information science professionals, humanists, and computer scientists) engaging in collaborative, international, data-intensive, publicly-funded interdisciplinary research. Benefits of such work include avoiding redundancy, exploding disciplinary silos, and more ambitious, larger-scale outputs. Challenges and lessons learned center on innovation, flexibility, and failure, translation, intermediaries, divisions of labor and delegation of responsibilities and tasks, conflict resolution, technology, outputs and publication, and timeframe, sustainability, and infrastructure. 相似文献
63.
64.
Relational transgressions are emotionally difficult for those who directly experience the transgression. Less is known about how transgressions affect those located within the personal network of a relational transgression victim. This study explored how network members engaged in support marshaling in response to another’s transgression experience. Results indicate that some participants marshaled support, citing four reasons for their actions: perceived insufficiency, camaraderie, personal ramifications, and personal values. We explore these reasons for marshaling support and discuss them within the broader context of support marshaling and relational transgressions. 相似文献
65.
Joanne DiFrancisco-Donoghue William G. Werner Peter C. Douris Hallie Zwibel 《运动与健康科学(英文)》2022,11(6):725
BackgroundEsports players, like traditional athletes, practice for long hours and, thus, are vulnerable to the negative health effects of prolonged sitting. There is a lack of research on the physical activity and the health ramifications of prolonged sitting by competitive players. The purpose of this study was to investigate activity levels, body mass index (BMI), and body composition in collegiate esports players as compared to age-matched controls.MethodsTwenty-four male collegiate esports players and non-esports players between 18 and 25 years of age signed a written consent to participate. Physical activity was examined using daily activity (step count) with a wrist-worn activity tracker. A questionnaire assessing physical activity was also administered. Secondary outcomes included body-fat percentage, lean-body mass, BMI, and bone mineral content measured using dual X-ray absorptiometry.ResultsThe step count in the esports players was significantly lower than the age-matched controls (6040.2 ± 3028.6 vs. 12843.8 ± 5661.1; p = 0.004). Esports players exhibited greater body-fat percentage (p = 0.05), less lean body mass (p = 0.003), and less bone mineral content (p = 0.03), despite no difference in BMI between the esports and non-esports players.ConclusionAs compared to non-esports players, collegiate esports players were significantly less active and had a higher body-fat percentage, with lower lean body mass and bone mineral content. The BMIs showed no difference between the 2 groups. Esports athletes displayed significantly less activity and poor body composition, which are all correlated with potential health issues and risk of injury. BMI did not capture this difference and should not be considered as an accurate measure of health in competitive esports players. 相似文献
66.
67.
68.
69.
70.