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   26070篇
  免费   374篇
  国内免费   16篇
教育   18671篇
科学研究   2053篇
各国文化   273篇
体育   2640篇
综合类   7篇
文化理论   273篇
信息传播   2543篇
  2021年   296篇
  2020年   461篇
  2019年   694篇
  2018年   934篇
  2017年   868篇
  2016年   804篇
  2015年   501篇
  2014年   619篇
  2013年   4812篇
  2012年   586篇
  2011年   605篇
  2010年   466篇
  2009年   502篇
  2008年   527篇
  2007年   488篇
  2006年   467篇
  2005年   395篇
  2004年   417篇
  2003年   343篇
  2002年   350篇
  2001年   480篇
  2000年   524篇
  1999年   455篇
  1998年   276篇
  1997年   263篇
  1996年   332篇
  1995年   261篇
  1994年   277篇
  1993年   234篇
  1992年   356篇
  1991年   380篇
  1990年   352篇
  1989年   382篇
  1988年   353篇
  1987年   337篇
  1986年   331篇
  1985年   375篇
  1984年   299篇
  1983年   309篇
  1982年   248篇
  1981年   253篇
  1980年   262篇
  1979年   355篇
  1978年   264篇
  1977年   243篇
  1976年   206篇
  1975年   189篇
  1974年   188篇
  1973年   178篇
  1971年   178篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Three factors tied with secondary student success in content‐area reading are demonstrated: (a) validated teacher‐focused and student‐focused interventions, (b) integrated and comprehensive service delivery systems, and (c) well‐designed, data‐based professional developmental programs. Difficult challenges face secondary students with LD and their teachers with regard to these students’ participation and success in required general education classes. Recently, instructional methods and materials have been developed and validated for promoting these students’ success. Some of them focus on how general education teachers plan and teach their content‐area courses; others focus on giving students the strategies they need to respond independently to the demands of their courses. This article describes these instructional methods, a service‐delivery model for implementing these interventions in secondary schools, and professional‐development mechanisms and administrative support that must be in place for the model to be maintained effectively.  相似文献   
42.
43.
Knowledgeable observers generally agree that students can give reasonably unbiased assessments of their classes, as long as proper instruments and procedures are used. These same observers agree, however, that more research is needed to understand the subtle dynamics which affect evaluations. Students' expectations (obtained on the first day) and the violation of these expectations are two possible factors. Their effects on students' final interest and future intentions are compared with students' actual reports of the class given at the end of the semester (n=196). Regression analysis using a simultaneous entry of expectations, expectancy violations, and final reports shows that students' reports at the end of the course account for almost all of the explained variance in the course rating items.  相似文献   
44.
45.
46.
There is limited information on the anthropometry, strength, endurance and flexibility of female rock climbers. The aim of this study was to compare these characteristics in three groups of females: Group 1 comprised 10 elite climbers aged 31.3 +/- 5.0 years (mean +/- s) who had led to a standard of 'hard very severe'; Group 2 consisted of 10 recreational climbers aged 24.1 +/- 4.0 years who had led to a standard of 'severe'; and Group 3 comprised 10 physically active individuals aged 28.5 +/- 5.0 years who had not previously rock-climbed. The tests included finger strength (grip strength, finger strength measured on climbing-specific apparatus), flexibility, bent arm hang and pull-ups. Regression procedures (analysis of covariance) were used to examine the influence of body mass, leg length, height and age. For finger strength, the elite climbers recorded significantly higher values (P < 0.05) than the recreational climbers and non-climbers (four fingers, right hand: elite 321 +/- 18 N, recreational 251 +/- 14 N, non-climbers 256 +/- 15 N; four fingers, left hand: elite 307 +/- 14 N, recreational 248 +/- 12 N, non-climbers 243 +/- 11 N). For grip strength of the right hand, the elite climbers recorded significantly higher values than the recreational climbers only (elite 338 +/- 12 N, recreational 289 +/- 10 N, non-climbers 307 +/- 11 N). The results suggest that elite climbers have greater finger strength than recreational climbers and non-climbers.  相似文献   
47.
48.
49.
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   
50.
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