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   122171篇
  免费   1851篇
  国内免费   235篇
教育   84906篇
科学研究   13479篇
各国文化   1977篇
体育   9481篇
综合类   171篇
文化理论   1058篇
信息传播   13185篇
  2022年   526篇
  2021年   935篇
  2020年   1649篇
  2019年   2568篇
  2018年   3077篇
  2017年   3320篇
  2016年   3376篇
  2015年   2303篇
  2014年   3186篇
  2013年   27294篇
  2012年   2362篇
  2011年   2726篇
  2010年   2321篇
  2009年   2608篇
  2008年   2371篇
  2007年   2116篇
  2006年   2359篇
  2005年   2358篇
  2004年   3040篇
  2003年   2349篇
  2002年   2158篇
  2001年   2018篇
  2000年   1699篇
  1999年   1578篇
  1998年   1452篇
  1997年   1521篇
  1996年   1704篇
  1995年   1464篇
  1994年   1472篇
  1993年   1471篇
  1992年   1506篇
  1991年   1423篇
  1990年   1416篇
  1989年   1352篇
  1988年   1194篇
  1987年   1139篇
  1986年   1175篇
  1985年   1432篇
  1984年   1287篇
  1983年   1295篇
  1982年   1270篇
  1981年   1182篇
  1980年   1163篇
  1979年   1290篇
  1978年   1218篇
  1977年   1120篇
  1976年   1006篇
  1975年   823篇
  1974年   792篇
  1973年   680篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
991.
992.
993.
Using a participatory learning approach, we report on the delivery and evaluation of a climate change and risk assessment tool to help manage water risks within the agricultural sector. Post-graduate water-professional students from a range of countries, from both developed and emerging economies were involved in using this tool. Our approach included participative learning tools – group discussion, software, and risk matrices. The materials developed met the needs of the students, allowing these students to incorporate their learning and adapt the package of materials for use in their home countries. Analysis of evaluations show that the tools and materials are particularly useful and emphasizes the need for sound learning materials and tools, funding to deliver training, and policy support to accelerate education and adoption of authentic climate change adaptation practices. The expected benefits for water professionals about climate change will be translated into improved socioeconomic and environmental outcomes if adopted.  相似文献   
994.
995.
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   
996.
997.
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   

998.
999.
In this essay, Jennifer Morton discusses educators as central examples of agents who engage in ideal and nonideal ways of thinking. The educator, as a representative of the political community, is tasked with two aims. The first is nurturing students with the skills and knowledge they need for the world as they will find it. In pursuing this goal, the educator is assuming certain social facts, some of them unjust, that constitute the present nonideal world. The second aim is civic — educating future citizens. Insofar as the educator is involved in pursuing this goal, his or her role is to work at making certain future social facts true, in the hope of making the future slightly more ideal. Morton argues that if we think of these two aims instrumentally, they can come into conflict. She does not suggest a resolution to this conflict, but rather develops an alternative expressive account of the civic role of the educator. Ideal thinking by educators, Morton maintains, should be thought of as constituting an expression of respect toward their fellow citizens here and now. Ultimately, she argues that this expressive component of the educator's job is crucial to the educator's role in the political community.  相似文献   
1000.
N. Mukunda 《Resonance》2011,16(9):796-797
  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