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   23501篇
  免费   281篇
  国内免费   14篇
教育   16695篇
科学研究   1920篇
各国文化   250篇
体育   2296篇
综合类   7篇
文化理论   212篇
信息传播   2416篇
  2021年   235篇
  2020年   359篇
  2019年   536篇
  2018年   728篇
  2017年   665篇
  2016年   662篇
  2015年   402篇
  2014年   532篇
  2013年   4235篇
  2012年   484篇
  2011年   536篇
  2010年   402篇
  2009年   434篇
  2008年   473篇
  2007年   439篇
  2006年   414篇
  2005年   359篇
  2004年   389篇
  2003年   304篇
  2002年   323篇
  2001年   458篇
  2000年   508篇
  1999年   434篇
  1998年   255篇
  1997年   248篇
  1996年   306篇
  1995年   244篇
  1994年   257篇
  1993年   220篇
  1992年   349篇
  1991年   366篇
  1990年   339篇
  1989年   364篇
  1988年   336篇
  1987年   325篇
  1986年   325篇
  1985年   370篇
  1984年   292篇
  1983年   303篇
  1982年   239篇
  1981年   246篇
  1980年   259篇
  1979年   349篇
  1978年   258篇
  1977年   238篇
  1976年   199篇
  1975年   181篇
  1974年   182篇
  1973年   176篇
  1971年   174篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
161.
162.
163.
University autonomy and public policies: A system theory perspective   总被引:3,自引:1,他引:3  
This article addresses problems facing universities because of external pressures for changes in their teaching, research, and governance and management policies and practices to align them with public policies. The view is put that governments are introducing public policies in times of economic recession to achieve rationalisation of human, physical and financial resources in higher education and to foster initiatives that shape university teaching and research to serve the needs of society and assist in national economic recovery. Examples of these external pressures, which have resulted in intrusions into the autonomy of university governance and management, are provided in the context of general system theory. It is assumed that the pressure of public policies on universities will continue and that each university should have a development plan for its present and future teaching and research activities, which has the endorsement of the government higher education advisory agency so that university management can function on a secure basis. The effectiveness and efficiency of functioning at the various levels of the university system should be assessed by periodic evaluative reviews. The quality of management by academic leaders should be fostered by the establishment of national centres for the study of higher education management and policy. The relationship between government higher education advisory agencies and universities should be renegotiated so that, as interdependent and interrelated parts of the higher education system, they work in joint co-operation to ensure the most effective and appropriate development of each institution. Nevertheless, a state of equilibrium between the university system and the supra (social) system within which it exists will never fully be achieved. The fundamental role and functions of a university require that it be concerned with teaching and researching both ageless and current phenomena. Hence, a perfect equilibrium state cannot exist if external social pressures are for the main weight of university activities to be shifted to providing service for the current needs of society.  相似文献   
164.
165.
166.
Rats shocked once by a stationary, wire-wrapped prod mounted on the wall of the test chamber incorporated sand, wooden blocks, or commercial bedding material on the floor of the chamber into a defensive response. They moved the available material toward and over the shock prod in all three conditions, adapting the response topography to the particular demands of the available material. In the sand and bedding conditions, the rats buried the prod by pushing and spraying piles of the material with snout and forepaws, whereas, in the blocks condition they picked up the blocks with their teeth and placed them individually around the prod. In Experiment 2, the rats buried the shock prod with blocks even when they had to first carry the blocks to the prod from the back of the chamber. Thus, conditioned defensive burying is not a simple, reflexive response to objects paired with a painful stimulus: it is a complex behavioral sequence that can vary as a function of the availability of burying materials.  相似文献   
167.
168.
169.
The effects of salience on 4- and 6-year-old children's ability to classify multiplicatively was investigated. A rank-ordered salience hierachy consisting of 3 dimensions was first assessed for each S. Several weeks later half the Ss of each age group were presented with a series of 9 3 times 3 matrix problems consisting of values from 2 dimensions ranked high in salience. The remaining half received identically structured matrices consisting of values from 1 highly salient dimension and of others from a dimension ranked low in salience. The goal in each problem was to select that compound stimulus from a set of alternatives that appropriately filled an empty cell in the matrix. Prior to the matrix problems, half the Ss in each matrix condition received sensitization training designed to increase the salience of the relevant dimensions in the matrix problems. The results showed that the pre-assessed salience of the relevant dimensions affected matrix solution in that more accurate performance was associated with those problems with both relevant dimensions relatively high in salience than those with one high and one low. Although the older Ss solved more problems, the evidence for coordination in the younger Ss was clear. No effects of sensitization training were found.  相似文献   
170.
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