全文获取类型
| 收费全文 | 132028篇 |
| 免费 | 1954篇 |
| 国内免费 | 257篇 |
专业分类
| 教育 | 91008篇 |
| 科学研究 | 14113篇 |
| 各国文化 | 2041篇 |
| 体育 | 10819篇 |
| 综合类 | 199篇 |
| 文化理论 | 1148篇 |
| 信息传播 | 14911篇 |
出版年
| 2021年 | 1029篇 |
| 2020年 | 1776篇 |
| 2019年 | 2722篇 |
| 2018年 | 3526篇 |
| 2017年 | 3743篇 |
| 2016年 | 3714篇 |
| 2015年 | 2417篇 |
| 2014年 | 3266篇 |
| 2013年 | 27710篇 |
| 2012年 | 2749篇 |
| 2011年 | 3312篇 |
| 2010年 | 2614篇 |
| 2009年 | 2765篇 |
| 2008年 | 2760篇 |
| 2007年 | 2540篇 |
| 2006年 | 2670篇 |
| 2005年 | 2658篇 |
| 2004年 | 3349篇 |
| 2003年 | 2571篇 |
| 2002年 | 2430篇 |
| 2001年 | 2401篇 |
| 2000年 | 2074篇 |
| 1999年 | 1909篇 |
| 1998年 | 1528篇 |
| 1997年 | 1586篇 |
| 1996年 | 1737篇 |
| 1995年 | 1495篇 |
| 1994年 | 1504篇 |
| 1993年 | 1494篇 |
| 1992年 | 1717篇 |
| 1991年 | 1620篇 |
| 1990年 | 1611篇 |
| 1989年 | 1597篇 |
| 1988年 | 1417篇 |
| 1987年 | 1363篇 |
| 1986年 | 1395篇 |
| 1985年 | 1654篇 |
| 1984年 | 1449篇 |
| 1983年 | 1436篇 |
| 1982年 | 1247篇 |
| 1981年 | 1075篇 |
| 1980年 | 1028篇 |
| 1979年 | 1285篇 |
| 1978年 | 1133篇 |
| 1977年 | 1022篇 |
| 1976年 | 948篇 |
| 1975年 | 785篇 |
| 1974年 | 796篇 |
| 1973年 | 762篇 |
| 1972年 | 615篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
991.
992.
993.
Alan M. Schwitzer Shana Pribesh Amanda Ellis‐O'Quinn Patricia B. Huber Elizabeth C. Wilmer 《Journal of College Counseling》2016,19(1):76-95
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
994.
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
995.
996.
997.
A Campus-Wide Investigation of Clicker Implementation: The Status of Peer Discussion in STEM Classes
Justin D. Lewin Erin L. Vinson MacKenzie R. Stetzer Michelle K. Smith 《CBE life sciences education》2016,15(1)
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
998.
999.
1000.