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   6214篇
  免费   95篇
  国内免费   6篇
教育   4562篇
科学研究   384篇
各国文化   100篇
体育   510篇
综合类   4篇
文化理论   107篇
信息传播   648篇
  2023年   16篇
  2022年   26篇
  2021年   72篇
  2020年   159篇
  2019年   203篇
  2018年   225篇
  2017年   260篇
  2016年   246篇
  2015年   153篇
  2014年   190篇
  2013年   1335篇
  2012年   183篇
  2011年   199篇
  2010年   158篇
  2009年   154篇
  2008年   187篇
  2007年   181篇
  2006年   153篇
  2005年   165篇
  2004年   139篇
  2003年   142篇
  2002年   130篇
  2001年   107篇
  2000年   109篇
  1999年   69篇
  1998年   67篇
  1997年   87篇
  1996年   88篇
  1995年   61篇
  1994年   76篇
  1993年   64篇
  1992年   78篇
  1991年   61篇
  1990年   63篇
  1989年   51篇
  1988年   48篇
  1987年   38篇
  1986年   53篇
  1985年   55篇
  1984年   55篇
  1983年   52篇
  1982年   43篇
  1981年   34篇
  1980年   36篇
  1979年   38篇
  1978年   39篇
  1977年   25篇
  1976年   23篇
  1975年   16篇
  1948年   18篇
排序方式: 共有6315条查询结果,搜索用时 31 毫秒
61.
62.
ABSTRACT

This study aimed to assess the effect of playing surface (Natural [NT] and Artificial [AT] Turf) on the fatigue response to a soccer-specific exercise protocol (SSEP). Eighteen male soccer players completed the SSEP on NT and AT with pre-, post-, and 48 h post-assessments of eccentric knee flexor (eccKF) and concentric knee extensor peak torque (PT), peak countermovement (CMJ) and squat jump (SJ) height, and Nordic hamstring break angle. No significant main effects for surface or any surface and time interactions were observed for any of the outcome measures, except for eccKF PT recorded at 3.14 rad·s-1, which was significantly lower 48 h post-trial in the AT condition (AT = 146.3 ± 20.4 Nm; NT = 158.8 ± 24.7 Nm). Main effects for time were observed between pre- and post-trial measures for eccKF PT at all angular velocities, Nordic break angle, CMJ and SJ height. Nordic break angle, and both CMJ and SJ height were significantly impaired 48 h post-trial when compared to pre-trial. The findings of the current study suggest surface dependent changes in eccKF PT which may have implications for recovery and subsequent performance after competition on AT.  相似文献   
63.
64.
Students with Attention Deficit Hyperactivity Disorders (ADHD) frequently experience significant difficulty mastering basic academic skills. This meta‐analysis focuses on one specific potential area of learning difficulties for these students: namely, writing. To identify the extent and depth of the potential writing challenges faced by students with ADHD, we conducted a meta‐analysis comparing the writing performance of grade 1 to 12 students with ADHD to their normally achieving peers. We located 44 papers, yielding 45 studies with 87 effect sizes. The average weighted effect sizes showed that students with ADHD obtained lower scores than their normally achieving peers for writing quality (–0.78), output (–0.64), number of genre elements (–0.69), vocabulary (–0.76), spelling (–0.80), and handwriting (–0.62). Contrary to expectations, moderator analyses found that neither study quality nor the source from which ADHD students were drawn (i.e., school/community vs. clinic/hospital) accounted for variability above sampling error alone.  相似文献   
65.
66.
67.
Abstract

Students develop robust mental models of teaching and learning during their school years, and as such, often teach as they were taught—possibly perpetuating practices that limit intellectual inquiry in classrooms. This paper reports on an analysis, using a conceptual framework and NUD?1ST software, of a cohort of 3rd‐year teacher education students' reflections on changes in their mental models following their experiences in a problem‐based learning (PBL) topic. Results provide evidence that students do report changing mental models in areas such as (a) the value of case studies for engaging with subject content, motivating learning, and connecting theory with practice; (b) self‐reflection and peer collaboration for cognitive and professional growth; and (c) processes of inquiry for developing self‐regulated learning practices.  相似文献   
68.
69.
70.
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