全文获取类型
收费全文 | 115829篇 |
免费 | 1862篇 |
国内免费 | 240篇 |
专业分类
教育 | 79765篇 |
科学研究 | 13216篇 |
各国文化 | 1973篇 |
体育 | 9293篇 |
综合类 | 172篇 |
文化理论 | 1053篇 |
信息传播 | 12459篇 |
出版年
2021年 | 901篇 |
2020年 | 1644篇 |
2019年 | 2544篇 |
2018年 | 3017篇 |
2017年 | 3292篇 |
2016年 | 3362篇 |
2015年 | 2309篇 |
2014年 | 3171篇 |
2013年 | 27244篇 |
2012年 | 2319篇 |
2011年 | 2645篇 |
2010年 | 2286篇 |
2009年 | 2609篇 |
2008年 | 2322篇 |
2007年 | 2050篇 |
2006年 | 2306篇 |
2005年 | 2295篇 |
2004年 | 2986篇 |
2003年 | 2225篇 |
2002年 | 2045篇 |
2001年 | 1856篇 |
2000年 | 1428篇 |
1999年 | 1327篇 |
1998年 | 1270篇 |
1997年 | 1339篇 |
1996年 | 1548篇 |
1995年 | 1353篇 |
1994年 | 1343篇 |
1993年 | 1338篇 |
1992年 | 1337篇 |
1991年 | 1249篇 |
1990年 | 1268篇 |
1989年 | 1148篇 |
1988年 | 1017篇 |
1987年 | 949篇 |
1986年 | 997篇 |
1985年 | 1218篇 |
1984年 | 1126篇 |
1983年 | 1065篇 |
1982年 | 1076篇 |
1981年 | 1002篇 |
1980年 | 956篇 |
1979年 | 1054篇 |
1978年 | 1033篇 |
1977年 | 951篇 |
1976年 | 851篇 |
1975年 | 697篇 |
1974年 | 697篇 |
1973年 | 654篇 |
1972年 | 501篇 |
排序方式: 共有10000条查询结果,搜索用时 159 毫秒
101.
Wrist movements have been identified as an important factor in producing a successful golf swing, with their complex motion influencing both club head velocity and orientation. However, a detailed analysis of wrist angles is lacking in the literature. The purpose of this study was to determine kinematics across wrists and club head characteristics during the golf swing under weak, neutral and strong grip conditions. Twelve professional male golfers executed 24 shots using a driver under three grip conditions. A six degrees of freedom analysis of the hand with respect to the distal forearm was performed using a 10-camera three-dimensional motion capture system. Differences in joint angles were explored using repeated measures ANOVAs at key swing events (onset, top of backswing and impact), in addition club head velocity and clubface angle at impact were also explored. Main findings revealed significant differences in flexion/extension and internal/external rotation for both wrists at all swing events, whereas fewer significant interactions were found in ulnar/radial deviation across grips for both wrists at all events. Clubface angle only differed significantly between the weak and the strong and neural grips, presenting a more ‘open’ clubface to the intended hitting direction. This study is the first to explore tri-planar wrist movement and the effect of different grips, such analysis has implications for coaching knowledge and practice and should inform future research into different aspects of skill, technique analysis and may inform injury mechanisms/prevention. 相似文献
102.
Paul L. Morgan George Farkas Marianne M. Hillemeier Wik Hung Pun Steve Maczuga 《Child development》2019,90(5):1802-1816
Whether and to what extent kindergarten children's executive functions (EF) constitute promising targets of early intervention is currently unclear. This study examined whether kindergarten children's EF predicted their second-grade academic achievement and behavior. This was done using (a) a longitudinal and nationally representative sample (N = 8,920, Mage = 97.6 months), (b) multiple measures of EF, academic achievement, and behavior, and (c) extensive statistical control including for domain-specific and domain-general lagged dependent variables. All three measures of EF—working memory, cognitive flexibility, and inhibitory control—positively and significantly predicted reading, mathematics, and science achievement. In addition, inhibitory control negatively predicted both externalizing and internalizing problem behaviors. Children's EF constitute promising targets of experimentally evaluated interventions for increasing academic and behavioral functioning. 相似文献
103.
Inhibitory control is the capacity to suppress inappropriate responses. It is central to many aspects of development, most notably executive function and effortful control. Despite its importance, however, there are significant gaps in our understanding of inhibitory control’s early development, and several findings that remain hard to explain. Here, a new account of inhibitory control is presented, explaining previous findings by distinguishing between two distinct ways that inhibitory control is used. According to this “Strength/Endurance” account, inappropriate responses which are highly prepotent tax inhibitory strength; whereas inappropriate responses which remain active for a long time tax inhibitory endurance. The developmental trajectories of these two aspects of inhibitory control, and their separate impacts on broader development, are discussed. 相似文献
104.
105.
106.
107.
Peter J. A. Jones 《Cultural and Social History》2018,15(2):155-175
Humiliation and self-ridicule worked as surprisingly important tools of evangelical outreach in the first decades of the Franciscan Order (c.1210–50). According to early Franciscan texts such as the Assisi Compilation (c.1240s) and Jordan of Giano’s Chronica (c.1260), St Francis and his earliest followers sought to win supporters by stripping naked in public, mocking learned preachers and ludicrously imitating animals. Yet within a few decades of the founder’s death this type of humour had been erased from Franciscan texts. Chronicles now omitted references to Francis’s laughter, while humiliating behaviour came to be condemned by Franciscan preachers, chroniclers and theologians alike. From being a means of undermining dignity and reason, joking was now instead celebrated as a tool of upholding these very same values. Describing the nature of this shift, and contextualising it within the evolving institutional priorities of the Franciscans under the leadership of Bonaventure (d.1274), this article will complicate debates about the development of medieval humour, while also reflecting on laughter’s role as a means of resistance to the significant social and cultural upheavals of the 1200s. 相似文献
108.
109.
Michael J. Mouat 《Journal of Cultural Economy》2018,11(4):315-329
According to its proponents, animal-free animal food products, such as cultured meat and synthetic cow’s milk, have the potential to overcome various environmental, health and ethical challenges that have emerged around global animal product consumption and the industrial agriculture that is needed to support it. Apart from the myriad of technical problems making animal-free food products, critics have pointed out the blurry ontological status of the food and the ethical challenges therein, and have questioned the veracity of the various promissory narratives being produced. This paper considers animal-free food from a social studies of economies and markets (SSEM) perspective. As a market that currently mostly only exists in potential, an SSEM perspective can reveal the various social and material relations that comprise the (bio)capital formation that will underpin any market-to-be, an aspect of markets that are often invisible once markets are up and running. Moreover, this perspective details the intimate role markets have in establishing the ethical and ontological aspects of animal-free foods in a political economy shaped by neoliberalisation and financialisation. 相似文献
110.