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   14316篇
  免费   194篇
  国内免费   7篇
教育   10463篇
科学研究   1227篇
各国文化   86篇
体育   1162篇
综合类   7篇
文化理论   93篇
信息传播   1479篇
  2021年   113篇
  2020年   161篇
  2019年   266篇
  2018年   377篇
  2017年   391篇
  2016年   352篇
  2015年   219篇
  2014年   293篇
  2013年   2706篇
  2012年   311篇
  2011年   374篇
  2010年   232篇
  2009年   234篇
  2008年   342篇
  2007年   243篇
  2006年   314篇
  2005年   205篇
  2004年   199篇
  2003年   182篇
  2002年   219篇
  2001年   325篇
  2000年   294篇
  1999年   264篇
  1998年   133篇
  1997年   158篇
  1996年   177篇
  1995年   179篇
  1994年   144篇
  1993年   171篇
  1992年   240篇
  1991年   212篇
  1990年   207篇
  1989年   250篇
  1988年   249篇
  1987年   207篇
  1986年   210篇
  1985年   230篇
  1984年   193篇
  1983年   231篇
  1982年   157篇
  1981年   142篇
  1980年   137篇
  1979年   212篇
  1978年   167篇
  1977年   157篇
  1976年   132篇
  1975年   119篇
  1974年   112篇
  1973年   119篇
  1971年   98篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Research in Higher Education - State financial aid grant programs are commonly categorized as either need-based, merit-based, or both, but their initial eligibility requirements include many more...  相似文献   
2.
3.
This article describes the Engineering Professors' Conference (EPC) approach to quality assurance for Higher Education Institutions, which is currently the only formalized alternative to British Standard 5750 'Quality Systems'. The EPC approach is based on principles of quality assurance and Total Quality Management which have been developed in industry. These ideas are briefly outlined, and an opinion expressed on the interpretation and application of BSS7S0 for HE. The EPC model is explained, illustrated with example elements taken from the EPC Specification and Guidelines for Quality Assurance in Higher Education. A top-down approach to the development of an institutional quality system is described, based on a quality policy statement. Areas of activity which have an important impact on the quality of education are identified, emphasising the quality assurance requirements of academic departments. Supporting and administrative quality system requirements are also described, as these also play an important role in the quality of education. Formal quality procedures and documentation in key areas are proposed.  相似文献   
4.
5.
6.
7.
8.
9.
Duchenne Muscular Dystrophy (DMD) is a neurogenetic developmental disorder that presents with progressive muscular weakness. It is caused by a mutation in a gene that results in the absence of specific products that normally localize to muscle cells and the central nervous system (CNS). The majority of affected individuals have IQs within the normal range, generally with lower verbal than performance IQ scores. Prior work has demonstrated selective deficits on tests of verbal span and immediate memory. For the current study, 26 boys with DMD (and normal intellectual function) and their unaffected siblings were evaluated. Paired comparisons demonstrated that the children with DMD had significantly poorer academic achievement scores than their siblings, even though their vocabulary levels and home and educational environments were comparable. Children with DMD also had more behavioral concerns, physical disabilities, and poorer verbal memory spans. Linear regression indicated that behavioral concerns, executive function, and physical disability did not contribute substantially to academic performance, whereas performance on verbal span did. DMD presents with a selective developmental aberration in verbal span that has wide‐ranging consequences on learning skills.  相似文献   
10.
本文要点: ◆遗传型是机体全部遗传基因的总和,代表了个体的遗传潜力.在决定个体的解剖、生化、生理、行为等特性或遗传表型(如褐色的眼睛、75kg的体重、50 ml/kg/min的最大摄氧量等)上起主导作用.  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