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   23519篇
  免费   412篇
  国内免费   32篇
教育   17037篇
科学研究   2012篇
各国文化   218篇
体育   1806篇
综合类   35篇
文化理论   202篇
信息传播   2653篇
  2022年   132篇
  2021年   238篇
  2020年   382篇
  2019年   515篇
  2018年   742篇
  2017年   821篇
  2016年   758篇
  2015年   461篇
  2014年   608篇
  2013年   4482篇
  2012年   591篇
  2011年   653篇
  2010年   503篇
  2009年   485篇
  2008年   536篇
  2007年   527篇
  2006年   461篇
  2005年   401篇
  2004年   386篇
  2003年   343篇
  2002年   398篇
  2001年   442篇
  2000年   412篇
  1999年   417篇
  1998年   218篇
  1997年   247篇
  1996年   258篇
  1995年   218篇
  1994年   224篇
  1993年   210篇
  1992年   309篇
  1991年   314篇
  1990年   335篇
  1989年   320篇
  1988年   305篇
  1987年   257篇
  1986年   268篇
  1985年   328篇
  1984年   273篇
  1983年   268篇
  1982年   204篇
  1981年   216篇
  1980年   190篇
  1979年   250篇
  1978年   226篇
  1977年   201篇
  1976年   169篇
  1975年   133篇
  1974年   130篇
  1973年   151篇
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
41.
42.
This study was designed to examine the magnitude and duration of excess postexercise oxygen consumption (EPOC) following upper body exercise, using lower body exercise for comparison. On separate days and in a counterbalanced order, eight subjects (four male and four female) performed a 20-min exercise at 60% of mode-specific peak oxygen uptake (VO2) using an arm crank and cycle ergometer. Prior to each exercise, baseline VO2 and heart rate (HR) were measured during the final 15 min of a 45-min seated rest. VO2 and HR were measured continuously during the postexercise period until baseline VO2 was reestablished. No significant difference between the two experimental conditions was found for magnitude of EPOC (t [7] = 0.69, p greater than .05). Mean (+/- SD) values were 9.2 +/- 3.3 and 10.4 +/- 5.8 kcal for the arm crank and cycle ergometer exercises, respectively. Duration of EPOC was relatively short and not significantly different (t [7] = 0.24, p greater than .05) between the upper body (22.9 +/- 13.7 min) and lower body (24.2 +/- 19.4 min) exercises. Within the framework of the chosen exercise conditions, these results suggest EPOC may be related primarily to the relative metabolic rate of the active musculature, as opposed to the absolute exercise VO2 or quantity of active muscle mass associated with these two types of exercise.  相似文献   
43.
44.
45.
The validity and reliability of curriculum‐based measures in reading as indicators of performance and progress for secondary‐school students were examined. Thirty‐five grade 8 students completed reading aloud and maze‐selection measures weekly for 10 weeks. Criterion measures were the state standards test in reading and the Woodcock–Johnson III Test of Achievement. Different time frames for each measure were compared. Most alternate‐form reliability coefficients were above .80. Criterion‐related validity coefficients ranged from .77 to .89. No differences related to time were found. Only maze selection reflected significant growth, with an average increase of 1.29 correct choices per week. Maze growth was related to the reading performance level and to change on the Woodcock–Johnson III from pre‐ to posttest.  相似文献   
46.
47.
48.
49.
This study examined literacy instruction in 14 first‐grade classrooms of English learners (ELs) in three schools in a large urban school district in southern California over a two‐year period. Pre‐ and posttest measures of oral‐reading fluency for 186 first graders, representing 11 native languages, were the outcome data. Reading‐fluency data were examined in reference to ratings of literacy practices using the English Learners Classroom Observation Instrument (ELCOI). Results indicated a moderately strong correlation (r= 0.65) between ELCOI rating and gain in oral‐reading fluency at the end of first grade. We report patterns of ELs who read below the oral‐reading fluency benchmark thresholds and patterns of students who were ultimately labeled with learning disabilities. Instructional practices of teachers rated “high” and “low” are discussed. Educational implications and recommendations for future research are discussed.  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