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   124820篇
  免费   1905篇
  国内免费   242篇
教育   86934篇
科学研究   13447篇
各国文化   1997篇
体育   9562篇
综合类   194篇
文化理论   1072篇
信息传播   13761篇
  2021年   954篇
  2020年   1677篇
  2019年   2585篇
  2018年   3159篇
  2017年   3431篇
  2016年   3472篇
  2015年   2328篇
  2014年   3197篇
  2013年   27458篇
  2012年   2443篇
  2011年   2864篇
  2010年   2395篇
  2009年   2638篇
  2008年   2462篇
  2007年   2238篇
  2006年   2455篇
  2005年   2450篇
  2004年   3106篇
  2003年   2384篇
  2002年   2229篇
  2001年   2100篇
  2000年   1733篇
  1999年   1653篇
  1998年   1485篇
  1997年   1535篇
  1996年   1699篇
  1995年   1470篇
  1994年   1471篇
  1993年   1467篇
  1992年   1519篇
  1991年   1439篇
  1990年   1441篇
  1989年   1359篇
  1988年   1238篇
  1987年   1147篇
  1986年   1179篇
  1985年   1447篇
  1984年   1315篇
  1983年   1298篇
  1982年   1258篇
  1981年   1171篇
  1980年   1161篇
  1979年   1264篇
  1978年   1212篇
  1977年   1131篇
  1976年   1010篇
  1975年   819篇
  1974年   814篇
  1973年   786篇
  1971年   629篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
892.
This article focuses on counseling research in the community college context. The article suggests the need for a robust community college knowledge base, describes some limitations of the current community college literature, and suggests a framework for more effective work in this area. The authors’ own experiences and selected examples of published studies are used as illustrations of the hurdles encountered and solutions available when examining counseling theories, practices, and outcomes in 2‐year settings.  相似文献   
893.
This paper demonstrates the application of module arithmetic for controlling the level of information security by a new technique referred as integer splitting. The basic definitions and concepts of the method are provided. The mathematical function of arising transformation is described in detail; its properties were studied and the basic theorems were proven that justify the use of splitting in practical applications. An active system was designed and characteristic cases of its operation are considered.  相似文献   
894.
895.
896.
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   
897.
898.
899.
900.
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