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   204篇
  免费   10篇
教育   141篇
科学研究   45篇
各国文化   1篇
体育   5篇
文化理论   1篇
信息传播   21篇
  2023年   6篇
  2022年   5篇
  2021年   7篇
  2020年   9篇
  2019年   12篇
  2018年   15篇
  2017年   19篇
  2016年   9篇
  2015年   4篇
  2014年   14篇
  2013年   26篇
  2012年   13篇
  2011年   10篇
  2010年   9篇
  2009年   7篇
  2008年   6篇
  2007年   10篇
  2006年   4篇
  2005年   2篇
  2004年   2篇
  2002年   2篇
  2001年   1篇
  1999年   2篇
  1996年   1篇
  1994年   2篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1987年   1篇
  1986年   1篇
  1985年   2篇
  1984年   2篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
  1977年   1篇
  1972年   1篇
  1965年   1篇
排序方式: 共有214条查询结果,搜索用时 15 毫秒
211.
The medical and economic importance of ticks has long been recognized due to their ability to transmit diseases to humans and animals. Ticks cause great economic losses to livestock, and adversely affect livestock hosts in several ways. Loss of blood is a direct effect of ticks acting as potential vector for haemo-protozoa and helminth parasites. Blood sucking by large numbers of ticks causes reduction in live weight and anemia among domestic animals, while their bites also reduce the quality of hides. However, major losses caused by ticks are due to their ability to transmit protozoan, rickettsial and viral diseases of livestock, which are of great economic importance world-wide. There are quite a few methods for controlling ticks, but every method has certain shortcomings. The present review is focused on ticks importance and their control.  相似文献   
212.
213.
This article draws primarily upon Asian research, literature, and experience to describe the open and dualmode universities of East and South Asia. It describes their origins, admissions, development, delivery methods, and applications of technology. It discusses their successes and failures and the contributing political, social, economic, and cultural factors. It questions whether Asian distance education is best served by adopting Western models or whether there is need for the evolution of indigenous systems more firmly based upon local, vocational, social, and cultural needs. It considers faculty development and performance improvement issues and concludes by arguing for more research and evaluation to increase the institutions' standing with the governments, students, and communities they serve.  相似文献   
214.
  • 170 early career researchers interviewed three times over 2 years, have uniquely contributed towards a stress test of scholarly communications and cracks have been identified.
  • The perfect storm created by the convergence of millennial values and the pandemic appears to have fast-forwarded the cracking process, perhaps, for the good.
  • The cracks in question are: (1) peer review; (2) reputational assessment; (3) unethical/questionable practices; (4) collaboration; (5) networking.
  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