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   14623篇
  免费   223篇
  国内免费   22篇
教育   10168篇
科学研究   1583篇
各国文化   135篇
体育   1344篇
综合类   7篇
文化理论   112篇
信息传播   1519篇
  2021年   147篇
  2020年   220篇
  2019年   317篇
  2018年   414篇
  2017年   392篇
  2016年   408篇
  2015年   274篇
  2014年   344篇
  2013年   2625篇
  2012年   319篇
  2011年   351篇
  2010年   311篇
  2009年   239篇
  2008年   301篇
  2007年   287篇
  2006年   256篇
  2005年   220篇
  2004年   244篇
  2003年   221篇
  2002年   195篇
  2001年   457篇
  2000年   316篇
  1999年   271篇
  1998年   128篇
  1997年   162篇
  1996年   142篇
  1995年   129篇
  1994年   155篇
  1993年   126篇
  1992年   192篇
  1991年   200篇
  1990年   201篇
  1989年   205篇
  1988年   175篇
  1987年   165篇
  1986年   181篇
  1985年   216篇
  1984年   171篇
  1983年   162篇
  1982年   142篇
  1981年   136篇
  1980年   119篇
  1979年   170篇
  1978年   138篇
  1977年   123篇
  1976年   94篇
  1975年   121篇
  1974年   104篇
  1973年   114篇
  1971年   101篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
This experimental study examines an online module designed to increase student competence in oral citation behavior using a mastery training strategy. Students in the experimental condition provided complete citations at a higher rate and provided more citation information for traditional and web-based sources compared with a control group without required training. Although subjective norms set by instructors also influence citation behavior, the general trend depicted was that students completing the required module training performed more complete citations. Implications for student learning, mastery instruction, and course assessment were considered to be generally beneficial and at minimal cost.  相似文献   
105.
ABSTRACT

The objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (< .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes.  相似文献   
106.
As counselor preparation programs are compelled to demonstrate student social and cultural competence, valid inventories are needed to measure development consistent with contemporary standards. The Intersectional Privilege Screening Inventory was created for this purpose, was assessed using 4 types of validity evidence, and has results supporting its use in student development.  相似文献   
107.
108.
109.
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   

110.
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