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   130136篇
  免费   1926篇
  国内免费   245篇
教育   90194篇
科学研究   13870篇
各国文化   2001篇
体育   10369篇
综合类   196篇
文化理论   1106篇
信息传播   14571篇
  2021年   992篇
  2020年   1697篇
  2019年   2620篇
  2018年   3333篇
  2017年   3568篇
  2016年   3575篇
  2015年   2348篇
  2014年   3199篇
  2013年   27354篇
  2012年   2625篇
  2011年   3160篇
  2010年   2509篇
  2009年   2678篇
  2008年   2640篇
  2007年   2406篇
  2006年   2552篇
  2005年   2560篇
  2004年   3228篇
  2003年   2495篇
  2002年   2339篇
  2001年   2330篇
  2000年   1996篇
  1999年   1831篇
  1998年   1492篇
  1997年   1546篇
  1996年   1706篇
  1995年   1474篇
  1994年   1476篇
  1993年   1479篇
  1992年   1666篇
  1991年   1564篇
  1990年   1569篇
  1989年   1540篇
  1988年   1374篇
  1987年   1296篇
  1986年   1311篇
  1985年   1584篇
  1984年   1401篇
  1983年   1380篇
  1982年   1305篇
  1981年   1209篇
  1980年   1196篇
  1979年   1402篇
  1978年   1277篇
  1977年   1159篇
  1976年   1062篇
  1975年   869篇
  1974年   879篇
  1973年   847篇
  1971年   701篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
942.
943.
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   
944.
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   
945.
946.
947.
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   
948.
949.
950.
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