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   26604篇
  免费   341篇
  国内免费   22篇
教育   18231篇
科学研究   2816篇
各国文化   263篇
体育   2374篇
综合类   38篇
文化理论   222篇
信息传播   3023篇
  2021年   234篇
  2020年   400篇
  2019年   546篇
  2018年   700篇
  2017年   796篇
  2016年   716篇
  2015年   463篇
  2014年   648篇
  2013年   4632篇
  2012年   578篇
  2011年   601篇
  2010年   528篇
  2009年   508篇
  2008年   519篇
  2007年   514篇
  2006年   491篇
  2005年   439篇
  2004年   705篇
  2003年   564篇
  2002年   601篇
  2001年   533篇
  2000年   557篇
  1999年   423篇
  1998年   224篇
  1997年   288篇
  1996年   320篇
  1995年   251篇
  1994年   253篇
  1993年   233篇
  1992年   349篇
  1991年   340篇
  1990年   351篇
  1989年   396篇
  1988年   331篇
  1987年   364篇
  1986年   323篇
  1985年   412篇
  1984年   330篇
  1983年   291篇
  1982年   267篇
  1981年   226篇
  1980年   215篇
  1979年   330篇
  1978年   252篇
  1977年   225篇
  1976年   218篇
  1975年   184篇
  1974年   199篇
  1973年   181篇
  1971年   184篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
The most frequently requested accommodation among students with learning disabilities (LD) in postsecondary settings is extended test time. The frequency with which this accommodation is requested and granted compels disability service providers to become knowledgeable about the factors that influence the need for, and appropriateness of, the accommodation. Moreover, the synthesis of these factors becomes the basis for determining if the accommodation is reasonable under federal law. The purpose of this article is to present a step‐by‐step model to be used as a decision‐making process when considering the accommodation of extended test time for postsecondary students with LD. The model is designed to assist disability service providers in the analysis and synthesis of information collected from (1) the student's diagnostic evaluation, (2) the course or classroom test to be accommodated, and (3) student interviews. A list of diagnostic tests from the four most frequently administered test batteries used with adults is provided, along with a concise explanation of how characteristics of LD impact reading, writing, and math, and relate to the need for extended time. This information can be used to determine if extended test time is a reasonable accommodation and to estimate how much additional time to provide.  相似文献   
34.
This paper considers the background of the Library-Bibliographic Classification as the national classification system of Russia, and its history and application in the USSR. It gives the general characteristic of the LBC structure, content and system of designations, as well as the state of its present updating.  相似文献   
35.
Between 1880 and 1950, the role of women as authors of elementary readers flowered and faded. From 1880 to 1915, female authorship dominated. Over the next fifteen years female authorship withstood the challenge of the scientific movement in education. Women’s role as solo authors declined, however, during the Depression, World War II and the postwar years. These changes are explained by the deteriorating environment for female professionalism, changes in the concept of reading expertise, the expanded role of publishers in textbook development, and the differences between men and women in opportunities for graduate study. E. Jennifer is Monaghan a professor in the Department of Educational Services, Brooklyn College of the City University of New York. She is the founder of the History of Reading Special Interest Group of the International Reading Association and author ofA Common Heritage: Noah Webster’s Blue-Back Speller.  相似文献   
36.
37.
The aim was to examine cross-cultural variation in linguistic responsiveness to young children in 10 English-speaking mother–child dyads and 10 Italian-speaking mother– child dyads. All 20 children were late talkers who possessed delays in expressive vocabulary development but age-appropriate cognitive and receptive language skills. Dyads were filmed in 15 minute free play contexts, which were transcribed and coded for measures of maternal linguistic input (e.g. rate, MLU, labels, expansions) and child language productivity (e.g. utterances, different words used). The results revealed that the Italian mothers used more utterances, spoke more quickly and used a more diverse vocabulary than the Canadian mothers. The Italian children mirrored their mothers and also used more utterances and a more diverse vocabulary than the Canadian children. Mothers in both groups used similar percentages of responsive labels and expansions. However, Italian mothers responded to fewer of their children's vocalisations, using a smaller percentage of imitations and interpretations than the Canadian mothers. Correlations between maternal input and children's language productivity revealed that contingent language measures (e.g. imitations, interpretations, expansions) were related to high levels of productivity in children in both cultural groups. The results support the use of language interventions based on increasing maternal responsiveness for these children at the one-word stage of language development. They also point to differences that may be culturally based. For example, Italian mothers use faster rates of interaction and appear to have higher expectations for their children's verbal participation in interaction. This is reflected in higher rates of language production from their children, even though children in both cultural groups have similar vocabulary sizes.  相似文献   
38.
依据现代跳技术的主要特点与发展趋势,结合大学生跳远运动员绝对速度水平相对较低,助跑准确性与稳定性不高的实际情况,对普通高校高水平跳远运动员训练的方法学中的训练指导思想、训练状态目标、训练系统调控方法,一般训练与专项训练的关系、专项素质和专项技术特征及其训练手段等六个主要问题做了尝试性的探讨。  相似文献   
39.
因学习《星光为何这般灿烂?》一的启发,深入研究中国乒乓球队科学管理的经验,提出以为本、系统理念、乒乓化、创新出效、竞争求胜等规律。  相似文献   
40.
An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  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