首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   126253篇
  免费   1897篇
  国内免费   247篇
教育   87634篇
科学研究   13578篇
各国文化   1987篇
体育   9768篇
综合类   202篇
文化理论   1075篇
信息传播   14153篇
  2021年   958篇
  2020年   1653篇
  2019年   2559篇
  2018年   3145篇
  2017年   3454篇
  2016年   3454篇
  2015年   2315篇
  2014年   3181篇
  2013年   27203篇
  2012年   2493篇
  2011年   2950篇
  2010年   2439篇
  2009年   2658篇
  2008年   2515篇
  2007年   2302篇
  2006年   2483篇
  2005年   2491篇
  2004年   3135篇
  2003年   2427篇
  2002年   2269篇
  2001年   2159篇
  2000年   1820篇
  1999年   1716篇
  1998年   1472篇
  1997年   1530篇
  1996年   1693篇
  1995年   1468篇
  1994年   1465篇
  1993年   1467篇
  1992年   1558篇
  1991年   1476篇
  1990年   1474篇
  1989年   1424篇
  1988年   1277篇
  1987年   1213篇
  1986年   1239篇
  1985年   1495篇
  1984年   1355篇
  1983年   1331篇
  1982年   1259篇
  1981年   1182篇
  1980年   1169篇
  1979年   1313篇
  1978年   1238篇
  1977年   1141篇
  1976年   1027篇
  1975年   828篇
  1974年   837篇
  1973年   801篇
  1971年   669篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
At the University of Maine, middle and high school teachers observed more than 250 university science, technology, engineering, and mathematics classes and collected information on the nature of instruction, including how clickers were being used. Comparisons of classes taught with (n = 80) and without (n = 184) clickers show that, while instructional behaviors differ, the use of clickers alone does not significantly impact the time instructors spend lecturing. One possible explanation stems from the observation of three distinct modes of clicker use: peer discussion, in which students had the opportunity to talk with one another during clicker questions; individual thinking, in which no peer discussion was observed; and alternative collaboration, in which students had time for discussion, but it was not paired with clicker questions. Investigation of these modes revealed differences in the range of behaviors, the amount of time instructors lecture, and how challenging the clicker questions were to answer. Because instructors can vary their instructional style from one clicker question to the next, we also explored differences in how individual instructors incorporated peer discussion during clicker questions. These findings provide new insights into the range of clicker implementation at a campus-wide level and how such findings can be used to inform targeted professional development for faculty.  相似文献   
912.
913.
914.
915.
916.
917.
Digitize-and-lend library projects can benefit societies in multiple ways, from providing information to people in remote areas or with physical disabilities to facilitating the sharing of library resources with information-poor communities. This article explores the potential of digitize and lend as well as outlines how projects can be undertaken in a manner respectful of the balance of copyright.  相似文献   
918.
919.
To explore the university experiences of students with learning disabilities (LD), 63,802 responses to the 2014 Student Experience in the Research University Survey were analyzed. Compared to other students, those with self‐reported LD (5.96 percent) had difficulty with assignments and had more obstacles caused by nonacademic responsibilities and imposed by their skill levels. Students with self‐reported LD sensed more bias toward people with disabilities on campus, and they were less satisfied with their overall experience. Interactions between disability status and age suggested even more challenges for older students who self‐reported LD. Approximately one‐third of students who self‐reported LD received accommodations. The rate of accommodations was higher among individuals who were wealthy, who lived alone, and who were out‐of‐state students. Compared to students who self‐reported LD but reported no accommodations, those with accommodations had more contact with faculty and less difficulty with assignments.  相似文献   
920.
Dropping out of university is regularly discussed as a negative indicator. However, research on actual career trajectories of dropouts is virtually non‐existent. This study estimates the association between tertiary dropouts and career chances in 15 European countries. Using data from the 2011 Programme for the International Assessment of Adult Competencies (PIAAC), estimates are derived from the application of propensity score matching taking a variety of individual background characteristics including cognitive skills into account. Results indicate that individuals are likely to fare better in the labour market if they enrol in university and drop out than if they do not enrol at all. Policy makers need to revise the notion that dropping out is purely negative.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号