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   26692篇
  免费   308篇
  国内免费   14篇
教育   18909篇
科学研究   2201篇
各国文化   297篇
体育   2580篇
综合类   9篇
文化理论   256篇
信息传播   2762篇
  2021年   266篇
  2020年   420篇
  2019年   632篇
  2018年   836篇
  2017年   765篇
  2016年   749篇
  2015年   458篇
  2014年   622篇
  2013年   4969篇
  2012年   560篇
  2011年   616篇
  2010年   473篇
  2009年   501篇
  2008年   539篇
  2007年   499篇
  2006年   496篇
  2005年   431篇
  2004年   452篇
  2003年   368篇
  2002年   370篇
  2001年   496篇
  2000年   550篇
  1999年   476篇
  1998年   299篇
  1997年   287篇
  1996年   339篇
  1995年   271篇
  1994年   285篇
  1993年   253篇
  1992年   376篇
  1991年   398篇
  1990年   375篇
  1989年   401篇
  1988年   373篇
  1987年   358篇
  1986年   354篇
  1985年   394篇
  1984年   320篇
  1983年   334篇
  1982年   261篇
  1981年   264篇
  1980年   280篇
  1979年   383篇
  1978年   284篇
  1977年   259篇
  1976年   225篇
  1975年   196篇
  1974年   201篇
  1973年   197篇
  1971年   185篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
The incidence of human immunodeficiency virus (HIV) infection acquired by children through sexual abuse is presently unknown. A telephone survey of 63 practitioners of pediatric sexual abuse (PSA) assessment in the five U.S. regions with highest prevalence of HIV infection was conducted to determine the present status of guidelines for HIV antibody testing of PSA victims. No formal protocol was used by any of those surveyed, and a literature review found no existing guidelines for HIV antibody testing of PSA victims. A standard set of clinical situations was presented to practitioners to assess whether a consensus exists of indications for HIV antibody testing of abused children. Seven clinical profiles with 12 criteria were presented including HIV antibody status, AIDS/ARC clinical profile, and behavioral profile of the assailant; clinical profile of the victim; pre-assault victim behavioral profile compatible with high risk of HIV infection (exclusively adolescents); parent/guardian anxiety/psychosocial profile; and profile of the assaultive act with respect to potential transmissibility of HIV. We found an 85% or greater consensus for 6 testing criteria, and based upon these propose an interim set of HIV antibody testing guidelines for PSA victims. There was no consensus about five testing criteria, but their frequent citation merits further consideration. Clinical application of interim guidelines and design of prospective studies to quantitatively evaluate them are reviewed.  相似文献   
932.
933.
934.
Knowledgeable observers generally agree that students can give reasonably unbiased assessments of their classes, as long as proper instruments and procedures are used. These same observers agree, however, that more research is needed to understand the subtle dynamics which affect evaluations. Students' expectations (obtained on the first day) and the violation of these expectations are two possible factors. Their effects on students' final interest and future intentions are compared with students' actual reports of the class given at the end of the semester (n=196). Regression analysis using a simultaneous entry of expectations, expectancy violations, and final reports shows that students' reports at the end of the course account for almost all of the explained variance in the course rating items.  相似文献   
935.
The authors argue that conventional mandatory and voluntary school desegregation techniques have failed to provide minority students with maximum feasible relief from invidious discrimination because they do not redress the root causes of segregation. They demonstrate that residential-based student assignment plans as well as plans that give students limited access to a few educationally enriched magnet schools are not asymmetrical remedies to wrongful segregation and thus work to perpetuate the racial and social inequities that they purport to correct. The authors offer an alternative approach to school desegregation—controlled choice—that operates independently from residential housing patterns and which explicitly seeks to maximize personal choice within a racially unitary, equitable, and educationally enhanced system of public schooling. Controlled choice was originally pioneered in Cambridge, Mass. during the early 1980s and has recently been adopted in Little Rock, Ark., and Fall River, Mass. The policy is also being actively reviewed by several of the nation's largest school districts including Seattle, Memphis, and Boston.  相似文献   
936.
937.
938.
Despite long-established roots in experimental psychophysiology and psychosomatic medicine, behavioral medicine and health psychology have only recently emerged as recognized, highly visible disciplines within medicine and the behavioral sciences. The rapid development of these fields has resulted partly from important scientific advances in the biomedical and behavioral sciences and partly from changing societal concerns and values. The latter include a greater preoccupation with individual self-expression and self-fulfillment, a decline in respect for authority per se, and an increased skepticism about social institutions. Coupled with these changes has been an increasing desire to take responsibility for one's own life and, in matters of health, of one's own body. The ways in which scientific advances and social changes have influenced the shape of contemporary behavioral medicine and health psychology are explored with the aid of two illustrations: the growth of a developmental perspective in behavioral medicine and health psychology; and work and health, including the effects of job stress and unemployment. Finally, the author stresses the need for a greater sense of community and concern for others, if we are to succeed in creating a growth-enhancing, health-producing climate for society as a whole and for each of us as individuals.  相似文献   
939.
940.
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   
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