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   23563篇
  免费   337篇
  国内免费   57篇
教育   17110篇
科学研究   2062篇
各国文化   244篇
体育   1630篇
综合类   46篇
文化理论   125篇
信息传播   2740篇
  2021年   243篇
  2020年   308篇
  2019年   484篇
  2018年   686篇
  2017年   689篇
  2016年   652篇
  2015年   422篇
  2014年   575篇
  2013年   4604篇
  2012年   573篇
  2011年   591篇
  2010年   533篇
  2009年   493篇
  2008年   527篇
  2007年   489篇
  2006年   517篇
  2005年   451篇
  2004年   365篇
  2003年   323篇
  2002年   307篇
  2001年   474篇
  2000年   384篇
  1999年   339篇
  1998年   219篇
  1997年   217篇
  1996年   245篇
  1995年   200篇
  1994年   205篇
  1993年   226篇
  1992年   306篇
  1991年   310篇
  1990年   336篇
  1989年   305篇
  1988年   263篇
  1987年   273篇
  1986年   276篇
  1985年   269篇
  1984年   261篇
  1983年   261篇
  1982年   227篇
  1981年   211篇
  1980年   205篇
  1979年   280篇
  1978年   244篇
  1977年   192篇
  1976年   186篇
  1975年   160篇
  1974年   161篇
  1973年   160篇
  1971年   166篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Drawing distinctions on the basis of at least some case characteristics in making reporting decisions makes considerable sense. Using data from a national survey of mandated reporters that included vignettes in which case and personal characteristics were systematically varied, this paper examines the impact of selected characteristics while controlling for others. The data reveal that respondents noticed and responded to case characteristics. Abuse-relevant judgments and reporting intentions varied, often substantially, as a function of case characteristics. Three case characteristics--previous abuse, severity of abuse, and recantation--were powerful predictors of vignette outcomes. A history of previous abuse led to judgments of greater seriousness, a more salutary impact of a report, and greater likelihood of reporting. More severe abuse was more likely to be labelled as abuse, and was more likely to be reported. When the alleged victim retracted her accusation upon questioning by an authority figure, respondents were significantly less likely to intend a report. Child age, perpetrator intent and family socioeconomic status also influenced abuse-relevant judgments and reporting intentions. Respondents were more likely to intend a report when younger children, lazy or angry perpetrators and children from poorer families were portrayed.  相似文献   
12.
The aim of this study was to investigate the effects of extensive endurance training (15-25 h per week) on the development of maximal oxygen uptake (VO2 max) in boys from puberty. Maximal oxygen uptake was measured a number of times each year from the age of puberty and for the next 6-9 years in seven young male elite cross-country skiers. Mean VO2 max was measured as 76.3 and 80.1 ml kg-1 min-1 at the ages of 14 and 15 years respectively. Despite the fast rate of growth during puberty, maximal aerobic power showed seasonal variations from the age of 14, reaching a plateau at the age of 15, whereas VO2 max (ml kg-2/3 min-1) increased continuously. It is concluded that, during puberty, boys probably attain significant increases in VO2 max when appropriate amounts of endurance training are undertaken.  相似文献   
13.
14.
How has Item Response Theory helped solve problems in the development and use of computer-adaptive tests? Do we need to balance item content with computer-adaptive tests? Could we use IRT to evaluate unusual responses to computer-delivered tests?  相似文献   
15.
16.
The role of the literary agent and the reception granted agents by publishers have changed markedly over the course of the twentieth century. Henry Holt’s views of agents, written in the first decade of the century, help define the status and activities of agents at that time. These are compared with the role of agents today, using archival sources, the book trade literature, and interviews. Thomas L. Bonn, review editor of this journal, is a librarian, Library at State University College at Cortland. He is the author ofUnder Cover: An Illustrated History of American Mass Market Paperbacks andHeavy Traffic and High Culture: The New American Library as Literary Gatekeeper. He is working on a study of American literary agents.  相似文献   
17.
18.
19.
The 1991 Janet Doe lecturer describes the vision held by the founders of the Medical Library Association of medical information being readily accessible to health professionals no matter how far they were located from major medical centers, and traces the pursuit of this vision to current outreach activities.  相似文献   
20.
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