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   2295篇
  免费   29篇
  国内免费   16篇
教育   1643篇
科学研究   238篇
各国文化   41篇
体育   226篇
综合类   29篇
文化理论   26篇
信息传播   137篇
  2022年   30篇
  2021年   30篇
  2020年   40篇
  2019年   53篇
  2018年   88篇
  2017年   77篇
  2016年   78篇
  2015年   44篇
  2014年   56篇
  2013年   365篇
  2012年   72篇
  2011年   61篇
  2010年   51篇
  2009年   52篇
  2008年   53篇
  2007年   78篇
  2006年   70篇
  2005年   56篇
  2004年   66篇
  2003年   103篇
  2002年   129篇
  2001年   121篇
  2000年   74篇
  1999年   28篇
  1998年   19篇
  1997年   19篇
  1996年   20篇
  1995年   19篇
  1994年   16篇
  1993年   17篇
  1992年   14篇
  1991年   15篇
  1990年   16篇
  1988年   10篇
  1987年   13篇
  1986年   11篇
  1985年   13篇
  1984年   16篇
  1983年   11篇
  1982年   10篇
  1980年   14篇
  1979年   11篇
  1978年   12篇
  1977年   9篇
  1976年   11篇
  1975年   11篇
  1974年   10篇
  1973年   11篇
  1969年   10篇
  1927年   8篇
排序方式: 共有2340条查询结果,搜索用时 15 毫秒
951.
This article discusses the use of a sentence completion instrument predicated on Lazarus' multimodal system. The instrument, entitled The Multimodal Sentence Completion Form for Chindren (MSCF-C), is designed to systematically assess client needs and assist in identifying intervention strategies. Administration procedures and profile development also are addressed. To assist the reader in understanding the strengths and limitations of the MSCF-C, a case study of a 12-year-old sixth-grade student is presented. Based on the verbatim responses of this student, a profile of client characteristics and plausible strategies was outlined.  相似文献   
952.
953.
Screening and measurement of monoclonal (M) proteins are commonly performed using capillary zone electrophoresis (CZE). The identification of M-protein or monoclonal component (CM) is an essential requirement for diagnosis and monitoring of monoclonal gammopathies. The detection of CM has been largely improved by CZE. Capillary electrophoresis estimates CM more accurately, because absence of variation due to different dye binding affinities of proteins as instead seen with agarose gel electrophoresis. However, interferences can be present in CZE. This occurs because all substances absorbing at 200 nm can be identified. Recognition and handling of specimens exhibiting such interferences is essential to ensure accurate diagnostic and patient safety. We herein report on an unusual case of serum protein electrophoresis, to highlight that laboratory staff must be aware of and familiarise with the information provided by laboratory instruments. For example, in the case of serum indices, about specimen quality.  相似文献   
954.
The purpose of this study was to gain deeper insights into how technology restructures the classroom as a spatial setting and how the positioning of these technologies can be associated with educational practices. The research includes a photographic and schematic representation of 115 classrooms in 12 primary schools in Belgium, resulting in a typology based on structural features of the classrooms. Based on the typology derived and the specific positioning of technology, nine teachers were purposefully selected and interviewed regarding their perceptions concerning the link between the use of technology and the classroom layout. The results indicate that (1) the positioning of technology can be related to specific types of technology use; (2) the classroom layout is in transition from one central display to multiple screens; and (3) because of physical access to technology, the educational practice of individual classes is spatially dispersed over different locations within the school.  相似文献   
955.
956.
957.
A strategy to facilitate understanding of spatial randomness is described, using student activities developed in sequence: looking at spatial patterns, simulating approximate spatial randomness using a grid of equally‐likely squares, using binomial probabilities for approximations and predictions and then comparing with given Poisson probabilities. Key questions are discussed with students on concepts needed to understand the approximate models and to generate predictions based on the approximations. The sequence is structured to be interactive to encourage student's interest and curiosity.  相似文献   
958.
959.
960.
别居又称分居 ,是一种不同于夫妻因偶尔不和而暂时分居的法律行为。它产生于欧洲中世纪基督教的教会法 ,至今仍存在。国外各主要国家都规定了别居制度 ,并对缓和夫妻矛盾 ,降低离婚率起了非常重要的作用。我国建国以来的 1950年和 1980年两部婚姻法均未规定别居制度 ,但现实社会中别居现象大量存在。为了更好地规范别居这一法律行为 ,借鉴国外各主要国家别居制度 ,我国法律中应明确规定别居制度。  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