全文获取类型
收费全文 | 25976篇 |
免费 | 185篇 |
国内免费 | 17篇 |
专业分类
教育 | 19430篇 |
科学研究 | 2411篇 |
各国文化 | 110篇 |
体育 | 1543篇 |
综合类 | 17篇 |
文化理论 | 472篇 |
信息传播 | 2195篇 |
出版年
2021年 | 137篇 |
2020年 | 188篇 |
2019年 | 319篇 |
2018年 | 2548篇 |
2017年 | 2479篇 |
2016年 | 1929篇 |
2015年 | 357篇 |
2014年 | 429篇 |
2013年 | 2794篇 |
2012年 | 570篇 |
2011年 | 1049篇 |
2010年 | 1050篇 |
2009年 | 648篇 |
2008年 | 957篇 |
2007年 | 1355篇 |
2006年 | 376篇 |
2005年 | 590篇 |
2004年 | 618篇 |
2003年 | 521篇 |
2002年 | 340篇 |
2001年 | 324篇 |
2000年 | 309篇 |
1999年 | 261篇 |
1998年 | 131篇 |
1997年 | 169篇 |
1996年 | 174篇 |
1995年 | 176篇 |
1994年 | 141篇 |
1993年 | 162篇 |
1992年 | 236篇 |
1991年 | 218篇 |
1990年 | 210篇 |
1989年 | 245篇 |
1988年 | 247篇 |
1987年 | 205篇 |
1986年 | 204篇 |
1985年 | 216篇 |
1984年 | 189篇 |
1983年 | 229篇 |
1982年 | 173篇 |
1981年 | 160篇 |
1980年 | 157篇 |
1979年 | 230篇 |
1978年 | 181篇 |
1977年 | 165篇 |
1976年 | 150篇 |
1975年 | 128篇 |
1974年 | 120篇 |
1973年 | 126篇 |
1971年 | 106篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
201.
David Burleigh 《Publishing Research Quarterly》2017,33(4):380-391
The library channel is often underappreciated as a key part of a publisher’s business strategy. In an age where publishers are constantly seeking new revenue and marketing opportunities, presence in the library—digitally—can yield significant growth. This paper examines the library channel, its business model based on library lending, the performance of eBooks and audiobooks across all subjects, and consumer reading behavior. Digital Book Clubs, a relatively new phenomenon, are also defined and illustrated with examples demonstrating the library’s valuable role in increasing discoverability and ultimately sales. 相似文献
202.
Katherine D. Veazey Morris Gilbert R. Parra Sarah R. S. Stender 《Journal of College Counseling》2011,14(1):21-33
The authors assessed the influences of several risk factors—self‐esteem, history of unwanted sexual contact (USC), depression, and sorority membership—on eating‐related and weight‐related attitudes and behaviors. Findings provide support for the roles of self‐esteem, depression, and USC on restricting attitudes. According to the authors' model, these independent variables predicted restricting attitudes that then predicted restricting behaviors. Implications for preventive interventions and the study's limitations are discussed. 相似文献
203.
204.
205.
This paper proves that social media use can contribute in important ways to employability outcomes. Specifically, results from a survey of 196 recent graduate students in China indicate that social media use is positively related to employability skills. Internship effectiveness serve as a mediating mechanism through which social media use affects employability skills. Zhongyong has a moderating effect on the social media use-internship effectiveness relationship. In addition to the direct moderating effect, Zhongyong is found to moderate the indirect relationship between social media use and employability skills. We discuss implications of these results for research and practice. 相似文献
206.
207.
208.
Kenneth D. Smith John Paul Eddy Thomas C. Richards Paul N. Dixon 《The American journal of distance education》2013,27(2):5-13
Abstract An empirical examination of accredited American higher education institutions was conducted to obtain baseline data regarding distance education copyright, intellectual property, and antitrust concerns. Additionally, a multiple‐case study involving ten of the top thirty accredited distance education institutions in America was conducted. Policy approaches were examined for all institutions, and differences were discussed between public and private institutions as well as between the following Carnegie Classification institutions: Research I and II, Doctorate I and II, and Master's I and II. Data indicated that, out of the schools surveyed, 22% of the institutions in these Carnegie Classification categories published copyright and intellectual property policies on their institution's Web site. In the case study, it was found that 90% of the institutions centrally controlled their distance education program administration as well as the copyright and intellectual property policies related to it. 相似文献
209.
210.
P.B. Tymms C.T. Fitz‐Gibbon J.J.C. McCabe R.D. Hazelwood 《School Effectiveness & School Improvement》2013,24(4):281-298
ABSTRACT This paper considers the examination results of TVEI and non TVEI pupils in the database established at the University of Newcastle in 1985‐87. The pupils took national exams in the summer of 1987, when they were about 16 years old. Their average grades (Exam Means) and their accumulated grades (Exam Totals) were considered separately. The Exam Mean and Exam Total scores were generally worse for TVEI than non TVEI pupils, even when pupils with the same ability test scores and aspirational scores were compared. However, it is possible that non TVEI factors caused the discrepancy in results and it is these factors which are the subjects of this paper. The paper considers firstly whether the differences are an artefact of regression analysis. Secondly, the data are considered using various multilevel models. Both analyses suggest that there was no TVEI effect on the Exam Mean score and a negative TVEI effect on the Exam Total. Various explanations for these findings, concerning internal school allocational and curriculum policies, are considered and discussed. 相似文献