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   18581篇
  免费   148篇
  国内免费   15篇
教育   13065篇
科学研究   2042篇
各国文化   258篇
体育   1194篇
综合类   10篇
文化理论   187篇
信息传播   1988篇
  2020年   184篇
  2019年   303篇
  2018年   371篇
  2017年   439篇
  2016年   392篇
  2015年   289篇
  2014年   403篇
  2013年   3964篇
  2012年   331篇
  2011年   350篇
  2010年   314篇
  2009年   303篇
  2008年   374篇
  2007年   373篇
  2006年   351篇
  2005年   329篇
  2004年   297篇
  2003年   274篇
  2002年   259篇
  2001年   248篇
  2000年   264篇
  1999年   253篇
  1998年   191篇
  1997年   191篇
  1996年   202篇
  1995年   218篇
  1994年   217篇
  1993年   215篇
  1992年   251篇
  1991年   249篇
  1990年   241篇
  1989年   256篇
  1988年   218篇
  1987年   227篇
  1986年   228篇
  1985年   252篇
  1984年   256篇
  1983年   247篇
  1982年   221篇
  1981年   203篇
  1980年   164篇
  1979年   219篇
  1978年   223篇
  1977年   185篇
  1976年   170篇
  1975年   149篇
  1974年   141篇
  1973年   156篇
  1972年   108篇
  1971年   119篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
This article discusses the changing relationships of authors and publishers, the current trends and challenges they face, and the direction of these relationships in the future. As the STM publishing industry finds itself in the midst of significant technological and economic changes, this article provides background to these changes and looks at the key elements, including open access business development, institutional repository trends, and emerging public financing policies in the future.  相似文献   
12.
13.
Do students today know less than their parents or grandparents did as students? Are they being academically outclassed by students of other nations? Or have ideologically driven policy makers painted an unnecessarily negative picture of student achievement?  相似文献   
14.
15.
16.
17.
Data from the International Social Survey Program indicate considerablevariation in the desire of respondents for increased spendingon the environment in Australia, Austria, Great Britain, theUnited States, and West Germany. This paper explores this variationwith the following objectives: (1) to determine the extent towhich the social bases of environmental concern are consistentacross nations; (2) to determine how the issue of the environmenthas been politicized in the five industrialized nations, focusingon the association of Old Leftist concerns and environmentalconcern; and (3) to determine the extent to which the socialbases of environmental concern can explain the cross-nationalvariation. The study usesa regression analysis, testing variablesrepresenting the social bases of environmental concern frompast research in the United States, a scale representing commitmentto the platform of the Old Left, and dummy variables for eachcountry. The results show that the social bases of environmentalconcern are the same in the five countries studied, includinga consistent positive association of Old Leftism with environmentalconcern. However, substantial variation between countries inthe overall level of concern remains. Potential sources of theremaining variation are examined.  相似文献   
18.
19.
Students who are deaf or hard of hearing (SDHH) often use test accommodations when they participate in large-scale, standardized assessments. The purpose of this article is to present findings from the Third Annual Survey of Assessment and Accommodations for Students who are Deaf or Hard of Hearing. The "big five" accommodations were reported by at least two-thirds of the 389 participants: extended time, small group/individual administration, test directions interpreted, test items read aloud, and test items interpreted. In a regression analysis, language used in instruction showed the most significant effects on accommodations use. The article considers these findings in light of a more proactive role for the National Survey in providing evidence for the effectiveness of accommodations with SDHH.  相似文献   
20.
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