全文获取类型
收费全文 | 20006篇 |
免费 | 248篇 |
国内免费 | 56篇 |
专业分类
教育 | 14702篇 |
科学研究 | 1514篇 |
各国文化 | 238篇 |
体育 | 1368篇 |
综合类 | 45篇 |
文化理论 | 124篇 |
信息传播 | 2319篇 |
出版年
2021年 | 198篇 |
2020年 | 255篇 |
2019年 | 391篇 |
2018年 | 563篇 |
2017年 | 590篇 |
2016年 | 558篇 |
2015年 | 357篇 |
2014年 | 496篇 |
2013年 | 4196篇 |
2012年 | 481篇 |
2011年 | 509篇 |
2010年 | 446篇 |
2009年 | 453篇 |
2008年 | 458篇 |
2007年 | 430篇 |
2006年 | 461篇 |
2005年 | 394篇 |
2004年 | 295篇 |
2003年 | 284篇 |
2002年 | 266篇 |
2001年 | 408篇 |
2000年 | 332篇 |
1999年 | 284篇 |
1998年 | 204篇 |
1997年 | 195篇 |
1996年 | 212篇 |
1995年 | 193篇 |
1994年 | 204篇 |
1993年 | 186篇 |
1992年 | 274篇 |
1991年 | 260篇 |
1990年 | 272篇 |
1989年 | 256篇 |
1988年 | 219篇 |
1987年 | 229篇 |
1986年 | 232篇 |
1985年 | 231篇 |
1984年 | 218篇 |
1983年 | 207篇 |
1982年 | 191篇 |
1981年 | 170篇 |
1980年 | 177篇 |
1979年 | 234篇 |
1978年 | 191篇 |
1977年 | 137篇 |
1976年 | 153篇 |
1975年 | 148篇 |
1974年 | 124篇 |
1973年 | 126篇 |
1971年 | 131篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
191.
Abbie E. Smith-Ryan Eric T. Trexler Hailee L. Wingfield Malia N.M. Blue 《Journal of sports sciences》2016,34(21):2038-2046
The purpose of this study was to evaluate two practical interval training protocols on cardiorespiratory fitness, lipids and body composition in overweight/obese women. Thirty women (mean ± SD; weight: 88.1 ± 15.9 kg; BMI: 32.0 ± 6.0 kg · m2) were randomly assigned to ten 1-min high-intensity intervals (90%VO2 peak, 1 min recovery) or five 2-min high-intensity intervals (80–100% VO2 peak, 1 min recovery) or control. Peak oxygen uptake (VO2 peak), peak power output (PPO), body composition and fasting blood lipids were evaluated before and after 3 weeks of training, completed 3 days per week. Results from ANCOVA analyses demonstrated no significant training group differences for any primary variables (P > 0.05). When training groups were collapsed, 1MIN and 2MIN resulted in a significant increase in PPO (?18.9 ± 8.5 watts; P = 0.014) and time to exhaustion (?55.1 ± 16.4 s; P = 0.001); non-significant increase in VO2 peak (?2.36 ± 1.34 ml · kg?1 · min?1; P = 0.185); and a significant decrease in fat mass (FM) (??1.96 ± 0.99 kg; P = 0.011). Short-term interval exercise training may be effective for decreasing FM and improving exercise tolerance in overweight and obese women. 相似文献
192.
David S. Haydon Ross A. Pinder Paul N. Grimshaw William S. P. Robertson 《Sports Engineering》2016,19(3):177-184
Limited recommendations of wheelchair configurations for court sports have been identified in the published literature. To accommodate the wide range of impairments in wheelchair rugby, players are given a point score that reflects their impairment. Players have regularly been grouped as high-, mid-, or low-point players in research, with high-point players having greater levels of muscle function compared with other classifications. This research documented the wheelchair configurations of elite Australian wheelchair rugby players across classification groups. Significant differences (p < 0.05) were found for increased seat height and decreased seat depth for high-point players compared with low- and mid-point groups, respectively. Low-point players displayed reduced wheelchair mass compared with high- and mid-point players, as well as increased frame length. Camber angles showed no significant differences across the classification groups. The incorporation of anthropometric measures, such as the elbow angle at the top dead center, was also investigated. While elbow angle showed no significant differences, seat height-to-total arm length ratio was higher for high-point players. Participants also completed surveys detailing their perception of the effect of altering wheelchair configurations. It is suggested that wheelchair configurations should consider an individual’s anthropometrics, impairment, training history, and court role to promote optimal performance, with predictive modeling having the potential to reduce the associated time and cost. 相似文献
193.
194.
This research examines 441 front-page images published in 367 newspapers on the day following the shooting in Paris of 12 people at or near the Charlie Hebdo office. The aim of this study is to understand how mainstream media visually framed responsibility for the Charlie Hebdo massacre and how these visual frames coalesced to represent collective narratives about press freedom. Through a collaborative visual analysis, this study attempts to understand how the selected visual frames worked to communicate the causes, effects, and responses to the massacre and also to press freedom—an ideological construct that news media had a vested interest in advancing. 相似文献
195.
196.
197.
The purpose of this study was to investigate whether a linear factor analytic method commonly used to investigate violation of the item response theory (IRT) unidimensionality assumption is sensitive to measurable curricular differences within a school district and to examine the possibility of differential item performance for groups of students receiving different instruction. For grades 3 and 6 in reading and mathematics, personnel from two midwestern school systems that regularly administer standardized achievement tests identified the formal textbook series used and provided ratings of test-instructional match for each school building (classroom). For both districts, the factor analysis results suggested no differences in percentages of variance for large first factors and relatively small second factors across ratings or series groups. The IRT analyses indicated little, if any, differential item performance for curricular subgroups. Thus, the impact of factors that might be related to curricular differences was judged to be minor. 相似文献
198.
199.
Mikyung Shin Hyunjoo Lee John William McKenna 《International Journal of Inclusive Education》2016,20(1):91-107
Co-teaching is commonly used to support students with disabilities in inclusive educational settings. However, there is often a gap between the potential effectiveness of co-teaching and actual classroom practice. This study examined preservice teachers’ co-teaching experiences to better understand this gap to identify potential practices for improving teacher training and service delivery. A review of 11 studies revealed that both special education and general education preservice teachers believed that co-teaching practices provided them opportunities to communicate and work collaboratively. Both groups agreed on the significant impact of personality in co-teaching as well as challenges in implementing co-teaching. Furthermore, special education preservice teachers noted that they lacked content knowledge, whereas general education preservice teachers thought they needed more training in the provision of accommodations and modifications. Study limitations, areas for future research, and implications for preservice teacher preparation are discussed. 相似文献
200.