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   126425篇
  免费   1879篇
  国内免费   238篇
教育   87767篇
科学研究   13575篇
各国文化   1983篇
体育   9980篇
综合类   173篇
文化理论   1092篇
信息传播   13972篇
  2021年   962篇
  2020年   1678篇
  2019年   2579篇
  2018年   3180篇
  2017年   3413篇
  2016年   3449篇
  2015年   2321篇
  2014年   3179篇
  2013年   27302篇
  2012年   2454篇
  2011年   2844篇
  2010年   2389篇
  2009年   2640篇
  2008年   2479篇
  2007年   2204篇
  2006年   2437篇
  2005年   2411篇
  2004年   3120篇
  2003年   2379篇
  2002年   2215篇
  2001年   2182篇
  2000年   1864篇
  1999年   1719篇
  1998年   1479篇
  1997年   1552篇
  1996年   1701篇
  1995年   1469篇
  1994年   1484篇
  1993年   1477篇
  1992年   1610篇
  1991年   1519篇
  1990年   1502篇
  1989年   1462篇
  1988年   1294篇
  1987年   1225篇
  1986年   1253篇
  1985年   1530篇
  1984年   1354篇
  1983年   1346篇
  1982年   1285篇
  1981年   1208篇
  1980年   1196篇
  1979年   1361篇
  1978年   1249篇
  1977年   1148篇
  1976年   1040篇
  1975年   847篇
  1974年   852篇
  1973年   825篇
  1971年   689篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
921.
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   
922.
923.
924.
925.
926.
927.
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   
928.
929.
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   
930.
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