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   38507篇
  免费   595篇
  国内免费   81篇
教育   27889篇
科学研究   3371篇
各国文化   367篇
体育   2726篇
综合类   75篇
文化理论   344篇
信息传播   4411篇
  2022年   187篇
  2021年   370篇
  2020年   548篇
  2019年   798篇
  2018年   1613篇
  2017年   1722篇
  2016年   1464篇
  2015年   729篇
  2014年   964篇
  2013年   7199篇
  2012年   1001篇
  2011年   1280篇
  2010年   1074篇
  2009年   924篇
  2008年   1039篇
  2007年   1095篇
  2006年   810篇
  2005年   773篇
  2004年   706篇
  2003年   610篇
  2002年   597篇
  2001年   726篇
  2000年   654篇
  1999年   593篇
  1998年   344篇
  1997年   351篇
  1996年   360篇
  1995年   313篇
  1994年   326篇
  1993年   282篇
  1992年   450篇
  1991年   443篇
  1990年   494篇
  1989年   458篇
  1988年   410篇
  1987年   365篇
  1986年   379篇
  1985年   436篇
  1984年   381篇
  1983年   350篇
  1982年   261篇
  1981年   278篇
  1980年   251篇
  1979年   360篇
  1978年   303篇
  1977年   251篇
  1976年   241篇
  1975年   204篇
  1974年   187篇
  1973年   220篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
The poor reading achievement of African-American children in urban schools is well established. African-American children from low-income homes may be at particular risk for reading difficulties, although middle-income children often fare poorly as well. Intervention efforts have focused on children in kindergarten through fifth grade. This article suggests that prevention efforts must begin prior to kindergarten entry. Several key variables that may influence young children's performance, including poverty, general oral language skills, dialectal variations, home literacy practices, standardized testing bias, and teacher expectations, are explored. Future directions for research addressing emergent literacy in African-American children are discussed throughout.  相似文献   
52.
53.
54.
55.
    
There is an increasing interest in linking character education programs with social and academic outcomes. The Child Development Project (CDP) is a character education program that promotes academic and social growth in teachers and students. This theory-driven evaluation employed a quasi-experimental design with matched control schools. School personnel participated in an intensive professional development process to learn the CDP model. Performance measures included state-mandated achievement measures, teacher self-assessment reports, and student attitudes and outcomes. Results yielded support for the CDP model as a strategy to improve social and, if properly implemented, cognitive outcomes in students; the model also improved teacher self-assessment and provided information that may facilitate professional growth about school collegiality. Implications for policy and practice will be discussed.  相似文献   
56.
57.
58.
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   
59.
60.
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