全文获取类型
收费全文 | 21312篇 |
免费 | 303篇 |
国内免费 | 125篇 |
专业分类
教育 | 14912篇 |
科学研究 | 2418篇 |
各国文化 | 206篇 |
体育 | 1815篇 |
综合类 | 15篇 |
文化理论 | 224篇 |
信息传播 | 2150篇 |
出版年
2021年 | 174篇 |
2020年 | 360篇 |
2019年 | 499篇 |
2018年 | 635篇 |
2017年 | 616篇 |
2016年 | 611篇 |
2015年 | 386篇 |
2014年 | 494篇 |
2013年 | 3873篇 |
2012年 | 470篇 |
2011年 | 523篇 |
2010年 | 392篇 |
2009年 | 385篇 |
2008年 | 436篇 |
2007年 | 459篇 |
2006年 | 421篇 |
2005年 | 423篇 |
2004年 | 377篇 |
2003年 | 380篇 |
2002年 | 361篇 |
2001年 | 357篇 |
2000年 | 374篇 |
1999年 | 340篇 |
1998年 | 205篇 |
1997年 | 231篇 |
1996年 | 270篇 |
1995年 | 227篇 |
1994年 | 200篇 |
1993年 | 201篇 |
1992年 | 283篇 |
1991年 | 279篇 |
1990年 | 286篇 |
1989年 | 304篇 |
1988年 | 262篇 |
1987年 | 267篇 |
1986年 | 268篇 |
1985年 | 304篇 |
1984年 | 277篇 |
1983年 | 265篇 |
1982年 | 218篇 |
1981年 | 205篇 |
1980年 | 193篇 |
1979年 | 284篇 |
1978年 | 232篇 |
1977年 | 204篇 |
1976年 | 170篇 |
1975年 | 150篇 |
1974年 | 164篇 |
1973年 | 139篇 |
1971年 | 127篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
133.
Emerging fathers experience a variety of stressors, including identity and role transitions, changes in their relationships, and challenges in developing caregiving skills. Increasing expectations for father involvement in childcare are emphasizing the importance of the father role, but social supports for new fathers remain scarce. Nineteen expectant and new fathers participated in a pilot 5-week group intervention aimed at improving stress coping and involvement attitudes using a combination of mindfulness practices and skill-building for parenting and partner communication. We administered surveys pre- and postintervention to assess efficacy in the areas of stress, depressive symptoms, father involvement attitudes, and mindfulness. Within-participant differences were compared across participants as well as examining individual reliable change. Results indicated initial reductions in stress and depressive symptoms and increases in the mindfulness constructs of nonjudgment and nonreactivity. No significant changes were found in father involvement attitudes. Perinatal intervention specific to fathers holds promise as an underexplored avenue for supporting families across the transition to parenthood. 相似文献
134.
Michael A. Peters 《Educational Philosophy and Theory》2020,52(8):805-810
135.
Leonardo S. Fortes Dalton De Lima-Junior Lenamar Fiorese José R. A. Nascimento-Júnior Arnaldo L. Mortatti Maria E. C. Ferreira 《Journal of sports sciences》2020,38(5):552-558
ABSTRACTThe objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes. 相似文献
136.
137.
138.
139.
140.