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   19348篇
  免费   245篇
  国内免费   29篇
教育   13461篇
科学研究   2311篇
各国文化   173篇
体育   1490篇
综合类   14篇
文化理论   185篇
信息传播   1988篇
  2022年   103篇
  2021年   209篇
  2020年   295篇
  2019年   395篇
  2018年   586篇
  2017年   611篇
  2016年   664篇
  2015年   457篇
  2014年   505篇
  2013年   3119篇
  2012年   547篇
  2011年   573篇
  2010年   453篇
  2009年   336篇
  2008年   427篇
  2007年   377篇
  2006年   353篇
  2005年   931篇
  2004年   764篇
  2003年   565篇
  2002年   343篇
  2001年   542篇
  2000年   354篇
  1999年   300篇
  1998年   142篇
  1997年   181篇
  1996年   161篇
  1995年   145篇
  1994年   160篇
  1993年   131篇
  1992年   198篇
  1991年   217篇
  1990年   205篇
  1989年   215篇
  1988年   178篇
  1987年   182篇
  1986年   184篇
  1985年   223篇
  1984年   171篇
  1983年   157篇
  1982年   145篇
  1981年   132篇
  1980年   128篇
  1979年   178篇
  1978年   142篇
  1977年   120篇
  1975年   118篇
  1974年   102篇
  1973年   112篇
  1971年   103篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
The present study examined three hypotheses regarding the consequences of early brain damage for academic achievement: First, early brain insults will have a negative impact on achievement, even in children with normal intelligence. Second, underachievement in these children will be at least partially independent of IQ (i.e., not fully accounted for by a lowering of IQ within the average range). Third, normally intelligent children with histories of brain insult will also manifest selective cognitive dysfunctions. To test these hypotheses, we compared two groups of children who had recovered from Haemophilus influenzae type b meningitis. The "complicated" group consisted of children who, as a consequence of having sustained neurologic complications during their illness, were more likely to have had brain insults. Children in the "uncomplicated" group did not have complications with their illness and were regarded as having escaped significant central nervous system (CNS) pathology. Only children with normal hearing and a prorated Full Scale IQ of at least 80 (WISC-R) were considered. Group differences on the Wide Range Achievement Test-Revised were consistent with the first two hypotheses. Although the two groups had similar Verbal IQs, the complicated group also had a lower mean Performance IQ and performed less well on perceptually demanding neuropsychological tasks. Findings suggest that learning disabilities may have selective, brain-related cognitive antecedents; but they challenge the practice of using IQ criteria for clinical diagnosis.  相似文献   
92.
93.
94.
95.
96.
97.
98.
J. Franklin Jameson and Waldo G. Leland remain forever linked in American archival history as the founders, respectively, of the National Archives and the American archival profession. From the immediate post-Revolutionary period until the eve of the First World War, American historians recognized that their nation's early history remained locked in European archives. However, not until the pioneering efforts of Leland, working under supervision of Jameson during the early 20th century, did any of these historical researchers bring to the United States, along with the voluminous copies of archival documents, the emerging tenets of European archival theory. This is the story of the collaboration between Jameson and Leland, and of Leland's efforts to professionalize American archival practice on the basis of European archival theory.  相似文献   
99.
100.
Currently, about ten Goryeo dynasty (918–1392 CE) sutra boxes are preserved in museums in Korea, Japan, the United States, the Netherlands, and the United Kingdom. This article is the result of an examination of a sutra box in the collection of the Rijksmuseum, Amsterdam (hereafter ‘Rijksmuseum sutra box’), which was first introduced to a European audience in the Transactions and Proceedings of the Japanese Society, in 1913–1914. The Rijksmuseum sutra box differs from other Goryeo sutra boxes. With its altered structure and modified motifs, this box bears significant value, not only for the research of thirteenth-century Goryeo mother-of-pearl art, but also for the study of cross-cultural adaptations in East Asian lacquer art. This article investigates the date of manufacture of the sutra box by analysing the manufacturing techniques and its various original and modified parts. For this, an X-ray radiograph was carried out for the first time. As a result, discoveries have been made regarding the structure and decoration of the lower part, which has been modified and is different from Goryeo mother-of-pearl sutra boxes. Finally, this paper reconsiders conservation and repair of Goryeo sutra boxes, as illuminated by an understanding of the original and repaired parts of this box.  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