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   42644篇
  免费   685篇
  国内免费   29篇
教育   30369篇
科学研究   3671篇
各国文化   472篇
体育   3668篇
综合类   18篇
文化理论   364篇
信息传播   4796篇
  2022年   269篇
  2021年   455篇
  2020年   711篇
  2019年   1079篇
  2018年   1461篇
  2017年   1410篇
  2016年   1262篇
  2015年   768篇
  2014年   1123篇
  2013年   8247篇
  2012年   1030篇
  2011年   1090篇
  2010年   816篇
  2009年   873篇
  2008年   945篇
  2007年   871篇
  2006年   781篇
  2005年   705篇
  2004年   706篇
  2003年   612篇
  2002年   628篇
  2001年   811篇
  2000年   806篇
  1999年   703篇
  1998年   435篇
  1997年   428篇
  1996年   502篇
  1995年   451篇
  1994年   403篇
  1993年   396篇
  1992年   585篇
  1991年   593篇
  1990年   578篇
  1989年   602篇
  1988年   538篇
  1987年   561篇
  1986年   537篇
  1985年   610篇
  1984年   494篇
  1983年   474篇
  1982年   403篇
  1981年   379篇
  1980年   339篇
  1979年   519篇
  1978年   376篇
  1977年   332篇
  1976年   298篇
  1975年   266篇
  1974年   277篇
  1973年   256篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
The history of nursing education in America is briefly told, with the growth of education in institutions of higher learning emphasized. Two trends in nursing education are paralleled by similar developments in nursing literature. The growth of scholarship in nursing is also noted. It is pointed out that nursing is a discipline in its own right, and that training for leadership is required. Continuing education programs are mentioned, together with the increase in nursing literature. Integrated libraries for the health sciences are recommended.  相似文献   
132.
133.
A user study of the Index Medicus done at the Walter Reed Army Medical Center included responses from a group of sixty researchers, clinicians, residents, and interns. An analysis of the questionnaire shows that, while all respondents use the Index Medicus, most use it to search for a specific subject or a specific author reference. Comments received were critical of the delay from the time of journal publication until the appearance of its citation in Index Medicus. Suggestions were offered concerning the type of publication most of the respondents would prefer.  相似文献   
134.
The immediate circumstances of the new Broadcasting Act are discussed. The impact of this legislation on schools broadcasting is then considered in relation to the history of earlier legislation in the UK, and the early responses to the Television Act of 1954. The importance of the personnel involved in television production and their commitment to the values of public service is stressed, and placed against the gloomier forebodings of the pessimists of the past‐‐and of today. The article concludes with the assertion that it is the people in the television industry itself, and the values they hold, that will ensure the continued survival of good schools television.  相似文献   
135.
Time series analysis was used to investigate the hypothesis that during acquisition of a motor skill, knowledge of results (KR) information is used to generate a stable internal referent about which response errors are randomly distributed. Sixteen subjects completed 50 acquisition trials of each of three movements whose spatial-temporal characteristics differed. Acquisition trials were either blocked, with each movement being presented in series, or randomized, with the presentation of movements occurring in random order. Analysis of movement time data indicated the contextual interference effect reported in previous studies was replicated in the present experiment. Time series analysis of the acquisition trial data revealed the majority of individual subject response patterns during blocked trials were best described by a model with a temporarily stationary, internal reference of the criterion and systematic, trial-to-trial variation of response errors. During random trial conditions, response patterns were usually best described by a "White-noise" model. This model predicts a permanently stationary, internal reference associated with randomly distributed response errors that are unaffected by KR information. These results are not consistent with previous work using time series analysis to describe motor behavior (Spray & Newell, 1986).  相似文献   
136.
137.
138.
139.
140.
Serials, one of the more complicated areas of library technical endeavors, has lacked the benefit of standards for a long time. Even now, with standards beginning to be available, the majority of institutions are not working within standard serials formats. A survey to determine the use of serials standards in libraries was conducted in 1988 by the American Library Association, Resources and Technical Services Division, Serials Section, Committee to Study Serials Standards. In the spring of 1988 a survey was sent to a group encompassing the Association of Research Libraries members, CONSER participants, United States Newspaper Program participants, Microform Project libraries, and some vendors and librarians who attended the Committee meetings on a regular basis. The survey questionnaire assessed the current level of serials standards awareness of librarians and vendors. Topics included the type of serials systems used, standards relevant to serials control and union listing and whether or not they are implemented, types and levels of training staff received in the application of standards, benefits of the standards, and areas where standards are most needed.  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