全文获取类型
收费全文 | 8773篇 |
免费 | 68篇 |
国内免费 | 7篇 |
专业分类
教育 | 6475篇 |
科学研究 | 729篇 |
各国文化 | 147篇 |
体育 | 526篇 |
综合类 | 5篇 |
文化理论 | 105篇 |
信息传播 | 861篇 |
出版年
2021年 | 55篇 |
2020年 | 84篇 |
2019年 | 155篇 |
2018年 | 207篇 |
2017年 | 237篇 |
2016年 | 220篇 |
2015年 | 171篇 |
2014年 | 216篇 |
2013年 | 2047篇 |
2012年 | 172篇 |
2011年 | 192篇 |
2010年 | 182篇 |
2009年 | 158篇 |
2008年 | 200篇 |
2007年 | 205篇 |
2006年 | 188篇 |
2005年 | 191篇 |
2004年 | 177篇 |
2003年 | 154篇 |
2002年 | 148篇 |
2001年 | 126篇 |
2000年 | 126篇 |
1999年 | 133篇 |
1998年 | 113篇 |
1997年 | 117篇 |
1996年 | 119篇 |
1995年 | 147篇 |
1994年 | 121篇 |
1993年 | 106篇 |
1992年 | 114篇 |
1991年 | 106篇 |
1990年 | 102篇 |
1989年 | 107篇 |
1988年 | 98篇 |
1987年 | 96篇 |
1986年 | 88篇 |
1985年 | 99篇 |
1984年 | 105篇 |
1983年 | 99篇 |
1982年 | 109篇 |
1981年 | 82篇 |
1980年 | 61篇 |
1979年 | 74篇 |
1978年 | 77篇 |
1977年 | 85篇 |
1976年 | 67篇 |
1975年 | 56篇 |
1974年 | 59篇 |
1973年 | 60篇 |
1971年 | 44篇 |
排序方式: 共有8848条查询结果,搜索用时 15 毫秒
201.
John E. Hilleary 《Journal of The Franklin Institute》1882,113(3):176-177
202.
203.
205.
206.
Traditional approaches to formative evaluation include one-to-one trials which provide some information about revisions that are needed in instructional materials, but typically fail to provide sufficient information about the learner's cognitive processing problems while studying the materials. Read-think-aloud methods are a viable alternative to traditional one-to-ones and provide valuable information about the learner's cognitive processing while reading instructional text. In this paper we describe the read-think-aloud method of formative evaluation and offer suggestions for its use. 相似文献
207.
The study assessed the effects of achievement standards, and choice of such standards, on mathematics performance in conditions where no tangible rewards were presented for reaching such standards. Elementary, junior high, and high school students performed a multiplication task in conditions where they chose standards, had standards imposed by an experimenter, or had no standards. Results demonstrated that high school students worked more multiplication problems when they chose standards than when identical standards were imposed by an experimenter or when no standards were present. Moreover, male students who chose standards worked more problems than did male students who had no standards; this effect was not found for female students. 相似文献
208.
John Downer 《Minerva》2017,55(2):229-248
Publics and policymakers increasingly have to contend with the risks of complex, safety-critical technologies, such as airframes and reactors. As such, ‘technological risk’ has become an important object of modern governance, with state regulators as core agents, and ‘reliability assessment’ as the most essential metric. The Science and Technology Studies (STS) literature casts doubt on whether or not we should place our faith in these assessments because predictively calculating the ultra-high reliability required of such systems poses seemingly insurmountable epistemological problems. This paper argues that these misgivings are warranted in the nuclear sphere, despite evidence from the aviation sphere suggesting that such calculations can be accurate. It explains why regulatory calculations that predict the reliability of new airframes cannot work in principle, and then it explains why those calculations work in practice. It then builds on this explanation to argue that the means by which engineers manage reliability in aviation is highly domain-specific, and to suggest how a more nuanced understanding of jetliners could inform debates about nuclear energy. 相似文献
209.
The aim of this study was to examine the association between alcohol consumption, alcohol sponsorship in sports and preferences of sponsored sportspeople regarding sponsorships/consumption. We investigate the impact of alcohol sponsorship on sportspeople in the Australian population using a national survey of sportspeople (N?=?2367), representing a range of club and professional sports. The results show an association between alcohol sponsorship of sport and increased alcohol consumption among sports participants (i.e. ‘sportspeople’). Additionally, a preference for sponsored alcohol brands was found by sponsored sportspeople. Our research adds to the growing evidence for policy review of alcohol sponsorship of sports and extends prior studies investigating impacts of alcohol sponsorship upon sports participants by generalizing to a large, national sample of sportspeople. 相似文献
210.
Tracing one's family genealogy is a complex process that requires situating a family's narratives within a historical context. This article reviews the use of critical family history research in an undergraduate Asian American studies course to examine not only the diversity and experiences of Asian Americans but also the unspoken narratives that lead to the creation of a single story. We are told single stories that often neglect the sociocultural factors—the historical reality—of our past. Our family histories are constructed historically and are embedded in social, political, and economic processes and relationships. This article argues that we need to complicate what we know about our past and examine policies and cultural practices that lead to a racialized system of power and privilege, racialized policies, and racialized oppression and progression. 相似文献