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   124564篇
  免费   1885篇
  国内免费   281篇
教育   86996篇
科学研究   13421篇
各国文化   1991篇
体育   9419篇
综合类   205篇
文化理论   1068篇
信息传播   13630篇
  2021年   978篇
  2020年   1669篇
  2019年   2605篇
  2018年   3116篇
  2017年   3396篇
  2016年   3433篇
  2015年   2350篇
  2014年   3245篇
  2013年   27488篇
  2012年   2464篇
  2011年   2835篇
  2010年   2436篇
  2009年   2708篇
  2008年   2503篇
  2007年   2223篇
  2006年   2517篇
  2005年   2481篇
  2004年   3057篇
  2003年   2383篇
  2002年   2172篇
  2001年   2085篇
  2000年   1697篇
  1999年   1578篇
  1998年   1471篇
  1997年   1521篇
  1996年   1702篇
  1995年   1472篇
  1994年   1476篇
  1993年   1478篇
  1992年   1512篇
  1991年   1421篇
  1990年   1443篇
  1989年   1333篇
  1988年   1199篇
  1987年   1132篇
  1986年   1161篇
  1985年   1421篇
  1984年   1299篇
  1983年   1277篇
  1982年   1259篇
  1981年   1183篇
  1980年   1159篇
  1979年   1250篇
  1978年   1215篇
  1977年   1121篇
  1976年   1000篇
  1975年   812篇
  1974年   812篇
  1973年   783篇
  1971年   639篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
Informed by the latest research on how people learn, effective teachers address both aspects of the teaching–learning equation—they engage students in the course material by implementing best teaching practices and they prepare students for learning by sharing best learning practices. The purpose of this study was to evaluate the impact of student‐centered learning practices on students’ perceptions of their ability to learn, specifically in a large enrollment, introductory food science and human nutrition course. Featured student‐centered learning practices included required assignments, optional study tools, and supplemental learning resources. A mixed method survey instrument with 5‐point Likert scales and qualitative, open‐ended questions was used to determine students’ (1) use of optional study tools and supplemental learning resources; (2) perceptions as to the quality and impact of required assignments, optional study tools, and supplemental learning resources to enhance their ability to learn; (3) perceptions as to the usefulness of required assignments, optional study tools, and supplemental learning resources to help them perform better in this course; and (4) overall satisfaction, as a learner, in this course. Overall, students identified study guides (developed using Bloom's taxonomy action verbs) (Mean = 4.34), microthemes (Mean = 4.27), and quizzes (Mean = 4.11) as the most beneficial resources to enhance their learning of the course material. Overall, 85% of students said they were extremely or very satisfied as learners in the course and nearly 75% of the students said the student‐centered learning practices should be offered to future FSHN 101 students.  相似文献   
992.
Educational Psychology Review - In his 1973 article The Structure of ill structured problems, Herbert Simon proposed that solving ill-structured problems could be modeled within the same...  相似文献   
993.
994.
Data from surveys of parents of students in Russian schools of various types in the years 2006 to 2011 show a high level of desire to invest in their children's education. There has been a high degree of stability in aspirations and investment in spite of the economic problems caused by global recession.  相似文献   
995.
996.
997.
998.
Counselors (N = 911) reported the research skills needed for practice and subsequent research training needs. Findings indicate that counselors have a high need for research skills at work, but training needs differ significantly by counselor type. Recommendations include increasing emphasis on single‐case design, survey design, and widely available data analysis tools.  相似文献   
999.
1000.
Objective: To analyze the possible dose-response association between components of sports participation (intensity, volume and previous engagement) and 4-year mortality rates among Brazilian adults.

Methods: 679 males and females (mean age among men = 66.7 ± 9.3 years old and mean age among women = 64.8 ± 8.9 years old) composed the study sample. Sports participation was assessed using Baecke’s questionnaire, which considers intensity, duration and previous engagement. Medical records were used to identify the cause of the death. Cox regression analysis was performed to determine the independent associations of exercise components and mortality.

Results: Participants that reported exercising at moderate-vigorous intensity (Moderate/vigorous: 4.1% versus None/light: 10.3% [p-value = 0.012]; HR = 0.42 [0.1 to 0.94)] and for more than four months (≥4 months: 5.3% versus <4 months: 10.2% [p-value = 0.038]; HR = 0.47 [0.24 to 0.94]) had lower mortality risk. The percentage of survival according to all-cause mortality was significantly higher for participants engaged in sports at moderate-vigorous intensity (p-value = 0.014), as well as for those engaged in sports for periods superior than four months (p-value = 0.036).

Conclusion: We found higher percentage of survival among adults engaged in sports at moderate-vigorous intensity and with at least four months of previous engagement.  相似文献   

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