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   2319篇
  免费   52篇
教育   1894篇
科学研究   47篇
各国文化   34篇
体育   71篇
综合类   1篇
文化理论   9篇
信息传播   315篇
  2023年   13篇
  2022年   21篇
  2021年   38篇
  2020年   69篇
  2019年   85篇
  2018年   122篇
  2017年   125篇
  2016年   113篇
  2015年   69篇
  2014年   99篇
  2013年   549篇
  2012年   69篇
  2011年   61篇
  2010年   56篇
  2009年   62篇
  2008年   64篇
  2007年   58篇
  2006年   69篇
  2005年   58篇
  2004年   62篇
  2003年   26篇
  2002年   37篇
  2001年   26篇
  2000年   19篇
  1999年   32篇
  1998年   25篇
  1997年   25篇
  1996年   39篇
  1995年   20篇
  1994年   27篇
  1993年   17篇
  1992年   15篇
  1991年   12篇
  1990年   16篇
  1989年   7篇
  1988年   8篇
  1987年   13篇
  1986年   10篇
  1985年   15篇
  1984年   11篇
  1983年   7篇
  1982年   12篇
  1981年   7篇
  1979年   14篇
  1978年   5篇
  1977年   12篇
  1976年   6篇
  1975年   7篇
  1974年   6篇
  1973年   5篇
排序方式: 共有2371条查询结果,搜索用时 15 毫秒
961.
962.
In this paper we describe a UK‐based participatory action research project that looks beyond the discourse of tolerance to investigate and challenge heteronormative processes in primary schools through reflective action research. This 28‐month ESRC‐funded project supports 15 primary teachers working in schools in three regions of the UK to develop action research projects that address lesbian, gay, bisexual and transgender equality in their own schools and classrooms. In this paper we will examine how the original principles on which the project design was based have manifested themselves throughout the course of the project, drawing upon examples of classroom practice and reflective discussions among project team members. We will explore how designing intentionally for collective participation has produced spaces for people to do and think in ways that have not only gone beyond what we imagined but have also challenged and sometimes contradicted our own ways of thinking.  相似文献   
963.
Changes in visual attention and story comprehension for children (N = 132) with attention deficit hyperactivity disorder (ADHD) and comparison peers were examined. Between the ages of 7 and 9 (Phase 1) and approximately 21 months later (Phase 2), children viewed 2 televised stories: 1 in the presence of toys and 1 in their absence. Both groups of children showed developmental increases in visual attention and stable group differences over time. Deficits in comprehension among children with ADHD, however, increased over time. Whereas comparison children’s recall of factual and causal information increased over time in both viewing conditions, children with ADHD showed no developmental improvement in recall of factual information in the toys‐present condition and no improvement in recall of causal relations in either viewing condition.  相似文献   
964.
965.
There is limited research studying fluid and electrolyte balance in rugby union players, and a paucity of information regarding the test–retest reliability. This study describes the fluid balance of elite rugby union players across multiple squads and the reliability of fluid balance measures between two equivalent training sessions. Sixty-one elite rugby players completed a single fluid balance testing session during a game simulation training session. A subsample of 21 players completed a second fluid balance testing session during an equivalent training session. Players were weighed in minimal clothing before and after each training session. Each player was provided with their own drinks which were weighed before and after each training session. More players gained body weight (9 (14.8%)) during training than lost greater than 2% of their initial body mass (1 (1.6%)). Pre-training body mass and rate of fluid loss were significantly associated (r?=?0.318, p?=?.013). There was a significant correlation between rate of fluid loss in sessions 1 (1.74?±?0.32?L?h?1) and 2 (1.10?±?0.31?L.?h?1), (r?=?0.470, p?=?.032). This could be useful for nutritionists working with rugby squads to identify players with high sweat losses.  相似文献   
966.
Our purpose was to compare joint loads between habitual rearfoot (hRF) and habitual mid/forefoot strikers (hFF), rearfoot (RFS) and mid/forefoot strike (FFS) patterns, and shorter stride lengths (SLs). Thirty-eight hRF and hFF ran at their normal SL, 5% and 10% shorter, as well as with the opposite foot strike. Three-dimensional ankle, knee, patellofemoral (PF) and hip contact forces were calculated. Nearly all contact forces decreased with a shorter SL (1.2–14.9% relative to preferred SL). In general, hRF had higher PF (hRF-RFS: 10.8 ± 1.4, hFF-FFS: 9.9 ± 2.0 BWs) and hip loads (axial hRF-RFS: ?9.9 ± 0.9, hFF-FFS: ?9.6 ± 1.0 BWs) than hFF. Many loads were similar between foot strike styles for the two groups, including axial and lateral hip, PF, posterior knee and shear ankle contact forces. Lateral knee and posterior hip contact forces were greater for RFS, and axial ankle and knee contact forces were greater for FFS. The tibia may be under greater loading with a FFS because of these greater axial forces. Summarising, a particular foot strike style does not universally decrease joint contact forces. However, shortening one’s SL 10% decreased nearly all lower extremity contact forces, so it may hold potential to decrease overuse injuries associated with excessive joint loads.  相似文献   
967.
Purpose: The purpose of this study was to examine differences in heart rate recovery (HRRec) and oxygen consumption recovery (VO2 recovery) between young healthy-weight children and children with obesity following a maximal volitional graded exercise test (GXTmax). Method: Twenty healthy-weight children and 13 children with obesity completed body composition testing and performed a GXTmax. Immediately after the GXTmax, HRRec and VO2 recovery were measured each minute for 5 consecutive minutes. Results: There were no statistically significant group differences in HRRec for the 5 min following maximal exercise, Wilks’s Lambda = .885, F(4, 28) = 0.911, p = .471, between the healthy-weight children and children with obesity despite statistically significant differences in body fat percentage (BF%; healthy-weight children, 18.5 ± 6.1%; children with obesity, 41.1 ± 6.9%, p < .001) and aerobic capacity relative to body mass (VO2 peak; healthy-weight children, 46.8 ± 8.2 mL/kg/min; children with obesity, 31.9 ± 4.7 mL/kg/min, p < .001). There were statistically significant differences in VO2 recovery for the 5 min following exercise, Wilks’s Lambda = .676, F(4, 26) = 3.117, p = .032. There were no statistically significant correlations between HRRec and body mass index (BMI), BF%, VO2peak, or physical activity. Conclusions: In a healthy pediatric population, obesity alone does not seem to significantly impact HRRec, and because HRRec was not related to obesity status, BMI, or BF%, it should not be used as the sole indicator of aerobic capacity or health status in children. Using more than one recovery variable (i.e., HRRec and VO2 recovery) may provide greater insight into cardiorespiratory fitness in this population.  相似文献   
968.
This paper examines the implications of the context of creation on the current and potential future uses of the records produced by the Comissao de Acolhimento, Verdade e Reconciliacao de Timor-Leste (Commission for Reception, Truth and Reconciliation, or CAVR). Given that the CAVR relied heavily on the testimony of the East Timorese people in its investigations that addressed a 25-year period, this paper considers the nature of memory and the role it played in creating and shaping the CAVR records. It also addresses the potential influences of the CAVR records, particularly the final report, Chega!, in shaping what will be known about this period by the Timorese people. The paper concludes with a discussion of the potential role of the CAVR records in contributing to the history of Timor-Leste. Although truth commissions are a problematic form of truth telling, with significant implications for the writing of history, the records of the CAVR are an invaluable source of information for Timorese history. If future users can recognize the CAVR records as the products of the context of their creation, these records will have a critical role to play in the development of history within Timor-Leste.  相似文献   
969.
In this paper we present a number of metrics for usage of the SAO/NASA Astrophysics Data System (ADS). Since the ADS is used by the entire astronomical community, these are indicative of how the astronomical literature is used. We will show how the use of the ADS has changed both quantitatively and qualitatively. We will also show that different types of users access the system in different ways. Finally, we show how use of the ADS has evolved over the years in various regions of the world.  相似文献   
970.
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