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   10083篇
  免费   130篇
  国内免费   8篇
教育   7002篇
科学研究   1167篇
各国文化   57篇
体育   811篇
综合类   4篇
文化理论   91篇
信息传播   1089篇
  2022年   82篇
  2021年   132篇
  2020年   174篇
  2019年   281篇
  2018年   422篇
  2017年   375篇
  2016年   385篇
  2015年   209篇
  2014年   338篇
  2013年   1662篇
  2012年   255篇
  2011年   271篇
  2010年   247篇
  2009年   228篇
  2008年   252篇
  2007年   219篇
  2006年   197篇
  2005年   164篇
  2004年   193篇
  2003年   157篇
  2002年   151篇
  2001年   216篇
  2000年   214篇
  1999年   193篇
  1998年   107篇
  1997年   144篇
  1996年   117篇
  1995年   86篇
  1994年   108篇
  1993年   78篇
  1992年   173篇
  1991年   134篇
  1990年   123篇
  1989年   155篇
  1988年   132篇
  1987年   107篇
  1986年   112篇
  1985年   121篇
  1984年   93篇
  1983年   95篇
  1982年   69篇
  1981年   75篇
  1980年   66篇
  1979年   112篇
  1978年   72篇
  1977年   63篇
  1976年   58篇
  1975年   52篇
  1974年   66篇
  1973年   63篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
This study attempts to establish the extent to which study programmes and study conditions within selected fields of study vary among institutions of higher education in the Federal Republic of Germany and the extent to which diversification has an impact on the careers and work assignments of graduates. All persons who graduated during the 1983‐1984 and 1984‐1985 academic years in mechanical engineering, economics/business, and social work from seven institutions of higher education were surveyed during their final year of study, again in a longitudinal study two years after graduation, and finally, four to five years after graduation. The authors come to the conclusion that the vertical diversification of higher education in the Federal Republic of Germany has had a less pronounced effect on the careers of graduates, over the last few years, than had been expected. No dominant elements of study programmes and study conditions could be identified which might explain study outcomes, careers, and job assignments.  相似文献   
22.
23.
24.
Acquiring both published and unpublished documents produced in Africa is, generally, a difficult task due to the existing poor state of bibliographic control and the publishing industry. It is even more difficult to obtain unpublished documents in a specialized area of study such as demography--a diffuse area which cuts across several disciplines. This paper discusses the problems encountered on acquisition trips to some African countries to acquire unpublished population material. To help solve the problems, the Population Association of Africa must persuade its members to send copies of their publications to population libraries and documentation centers in their individual countries for dissemination to the other users in Africa. The various organizations and institutions in Africa engaged in the teaching and research of population studies should have an agreement to exchange copies of their theses. The Economic Commission for Africa (ECA) and the Organization of African Unity (OAU) should make representations to the various African member countries on the need to disseminate the results of vital censuses and surveys conducted. Finally, the Population Information Network for Africa (POPIN-AFRICA) with its coordinating unit at the population division of ECA should ensure that all the nodes of the network have the financial and other resources to be able to acquire the relevant documents needed for their operations.  相似文献   
25.
Computers are integral to medical practice, education, and research. While medical students learn computer skills during their training, many practicing physicians do not have the same computer experience. To familiarize this group with the exciting developments in medical informatics, the Himmelfarb Health Sciences Library and Department of Computer Medicine at the George Washington University Medical Center organized a workshop "Introducing Your Office Computer!" for attending physicians. The workshop featured a short lecture/video presentation on computer applications in medicine followed by a "computer fair" of five computer applications. Eleven physicians attended the workshop. Feedback was very positive; many called later to request more detailed instructions on using the programs demonstrated. It was a valuable experience for the staff, and new bridges were built between departments and clients.  相似文献   
26.
27.
28.
29.
30.
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