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   13022篇
  免费   207篇
  国内免费   11篇
教育   8973篇
科学研究   1660篇
各国文化   113篇
体育   984篇
综合类   17篇
文化理论   160篇
信息传播   1333篇
  2022年   87篇
  2021年   133篇
  2020年   203篇
  2019年   270篇
  2018年   390篇
  2017年   413篇
  2016年   376篇
  2015年   249篇
  2014年   363篇
  2013年   2149篇
  2012年   322篇
  2011年   304篇
  2010年   296篇
  2009年   257篇
  2008年   276篇
  2007年   285篇
  2006年   270篇
  2005年   229篇
  2004年   256篇
  2003年   223篇
  2002年   235篇
  2001年   312篇
  2000年   332篇
  1999年   252篇
  1998年   138篇
  1997年   179篇
  1996年   174篇
  1995年   118篇
  1994年   130篇
  1993年   115篇
  1992年   191篇
  1991年   174篇
  1990年   203篇
  1989年   206篇
  1988年   172篇
  1987年   186篇
  1986年   167篇
  1985年   199篇
  1984年   142篇
  1983年   122篇
  1982年   119篇
  1981年   95篇
  1980年   94篇
  1979年   165篇
  1978年   111篇
  1977年   98篇
  1975年   87篇
  1974年   89篇
  1973年   85篇
  1971年   81篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
111.
This article was delivered as the plenary address at the Massachusetts Association for Bilingual Education Annual Conference, November, 1986. The style of the speech has been preserved.  相似文献   
112.
113.
114.
To inform anti-doping policy and practice, it is important to understand the complexities of doping. The purpose of this study was to collate and systematically examine the reasoned decisions published by UK Anti-Doping for doping sanctions in rugby union in the UK since the introduction of the 2009 World Anti-Doping Code. Case files were content analysed to extract demographic information and details relating to the anti-doping rule violation (ADRV), including individuals’ explanations for how/why the ADRV occurred. Between 2009 and 2015, 49 rugby union players and one coach from across the UK were sanctioned. Over 50% of the cases involved players under the age of 25, competing at sub-elite levels. Reasons in defence of the ADRV focused on functional use and lifestyle factors rather than performance enhancement. An a priori assessment of the “need”, “risk” and “consequence” of using a substance was not commonplace; further strengthening calls for increasing the reach of anti-doping education. The findings also deconstruct the view that “doped” athletes are the same. Consequently, deepening understanding of the social and cultural conditions that encourage doping remains a priority.  相似文献   
115.
116.
117.
118.

Recent articles on the gifted self are characterized by theoretical confusion and lack of definitional clarity. This article, anchored in current self psychology theory, defines the self experience as the person's subjective experience of organization and meaning, the maintenance of which is crucial to normal functioning. Interactions with others are a formative part of the self experience. Traits of giftedness, and the reactions of others to these, contribute to the gifted self experience. Social and emotional problems of giftedness, such as those that arise with asynchronous development and perfectionism, are based on a compromised sense of cohesion and unity of the self experience.  相似文献   
119.
This study examines the materials of a contemporary pictorial artwork, belonging to the Macedonian Museum of Contemporary Art in Thessaloniki (Greece), and needing conservation. The combined use of micro-FTIR and micro-Raman spectroscopy allowed the identification of almost all painting materials. Moreover, the stability of a series of synthetic pigments towards accelerated ageing is investigated in applications using the contemporary binding medium styrene-acrylic copolymer. The pigments in question are: Hansa yellow PY3 and PY74, quinacridone PV19 and PR122, naphthol AS PR112, phthalocyanine green PG7 and blue PB15, dioxazine PV37, van Dyck brown PBk11, ivory black PBk9, and titanium dioxide PW6. The organic pigments were applied alone or mixed with titanium dioxide, in rutile form or as a mixture of rutile/anatase. The experimental swatches were subjected to ageing tests, and subsequently studied as to colour changes by means of colorimetric measurements, and as to the molecular structure differentiations by infrared spectroscopy in reflectance mode. The ageing tests included exposure to high temperature and humidity (90 °C, 60% RH) and to ultraviolet radiation (350 nm, 30 °C and 50% RH, with a substantial temperature increase at 90 °C for 3 days). The greater colour difference is caused by high temperature and humidity, whereas paint layers containing TiO2, and especially the mixture of the forms rutile/anatase, prove very susceptible to ultraviolet radiation, demonstrating a significant colour difference and extended molecular changes.  相似文献   
120.
Previous attempts to examine the effects of different types of text format on reading have focused on the improvement of reading. The present study investigated the effect of using a text format that might be predicted to disrupt reading. In this study 56 individuals were presented with reading material presented in right-justified format and in'ragged'uneven line format. Subjects performed significantly worse on right-justified material. Subjects who were classified as good readers on the basis of a pretest were more affected than poor readers. It is suggested that this may result from differences in the reading style of good and poor readers.  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