全文获取类型
收费全文 | 18213篇 |
免费 | 282篇 |
国内免费 | 54篇 |
专业分类
教育 | 13523篇 |
科学研究 | 1241篇 |
各国文化 | 193篇 |
体育 | 1296篇 |
综合类 | 44篇 |
文化理论 | 104篇 |
信息传播 | 2148篇 |
出版年
2022年 | 124篇 |
2021年 | 211篇 |
2020年 | 282篇 |
2019年 | 446篇 |
2018年 | 616篇 |
2017年 | 637篇 |
2016年 | 586篇 |
2015年 | 388篇 |
2014年 | 537篇 |
2013年 | 3636篇 |
2012年 | 523篇 |
2011年 | 515篇 |
2010年 | 478篇 |
2009年 | 425篇 |
2008年 | 463篇 |
2007年 | 428篇 |
2006年 | 427篇 |
2005年 | 382篇 |
2004年 | 281篇 |
2003年 | 266篇 |
2002年 | 255篇 |
2001年 | 376篇 |
2000年 | 308篇 |
1999年 | 259篇 |
1998年 | 170篇 |
1997年 | 160篇 |
1996年 | 180篇 |
1995年 | 147篇 |
1994年 | 161篇 |
1993年 | 144篇 |
1992年 | 218篇 |
1991年 | 218篇 |
1990年 | 243篇 |
1989年 | 219篇 |
1988年 | 182篇 |
1987年 | 184篇 |
1986年 | 193篇 |
1985年 | 176篇 |
1984年 | 180篇 |
1983年 | 167篇 |
1982年 | 136篇 |
1981年 | 137篇 |
1980年 | 137篇 |
1979年 | 191篇 |
1978年 | 161篇 |
1977年 | 112篇 |
1976年 | 120篇 |
1975年 | 111篇 |
1973年 | 106篇 |
1971年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
Qingli Lei Rose A. Mason Yan Ping Xin John L. Davis Marie David Catharine Lory 《Learning disabilities research & practice》2020,35(4):201-217
This single-case meta-analysis is the first to provide a quantitative synthesis of the published literature on mathematics word problem-solving intervention studies for English learners with learning disabilities and mathematics difficulties. A total of ten single-subject studies were included for analysis. The current study investigated the magnitude of the effect of mathematics interventions targeting the improvement of students’ mathematics word problem-solving performance, and analyzed variables that moderated this effect. Results indicate a moderate overall effect size of 0.81 (95% CI [0.71, 0.90]) on word problem-solving performance for English learners with learning disabilities and mathematics difficulties. Moderator variables such as the implementer of the interventions, instructional focus, and word problem-solving content significantly moderated the mathematics intervention effects. 相似文献
102.
ABSTRACTRecently, there has been much controversy over the International Association of Athletics Federation (IAAF) regulations regarding eligibility to compete and natural testosterone levels in female athletes. Much interest lies in the analysis of Caster Semenya's extraordinary performance. The objective of this work were, a) Complete an analysis of Caster Semenya's results during the 800m finals and b) search for existing similar performances by other female athletes. We analysed the results of the finals of all IAAF World Championships and Olympic Games from 1984–2016, including the 800m results of the Diamond Leagues 2016–2018. Exponential curves were fit to the data to characterise and predict performance for each event. Caster Semenya's finishing times before her ineligibility to compete and after the suspension of the IAAF hyperandrogenism regulation were found to be 1.24% and 1.49%, respectively, faster than the characteristic performance of the elite-standard in the women’s 800m final. Other female athletes, with finishing times faster than the ones predicted by the characteristic curves were also discovered. The percentage difference in performance between Caster Semenya and the other participants did not reach 3% in the 800m event. No conclusions can be drawn regarding extraordinary results ever performed during the 100m, 200m or 400m finals. 相似文献
103.
We present a variant of the Game of Pig to introduce the concepts of probability, simulation and expected value. 相似文献
104.
105.
106.
107.
108.
Abstract The authors focus on exploiting new methods of language acquisition with the help of the possibilities offered by the Internet. As a new option for computer‐assisted language learning, the Internet is considered to be a source for individual learning and problem oriented teaching in many other areas. Expanding knowledge in parallel in informatics and the English language is an asset. In addition to pointing out starting off sites for ESL teachers and introducing some interesting examples, some criteria of constructing language teaching WWW pages of our own are also listed. 相似文献
109.
Maria Rontou 《Support for Learning》2012,27(4):140-149
This article deals with differentiation of teaching methods and extra time in class for pupils with dyslexia by English as a Foreign Language (EFL) teachers in two Greek state secondary schools. Activity theory is applied to analyse the contradictions that emerge around the issue of differentiation for pupils with dyslexia from data compiled from interviews with teachers, pupils and parents and field notes from lesson observations across two schools. The analysis shows that contradictions are created when participants try to achieve their goals for differentiation by lack of teachers’ knowledge, inadequate diagnosis, unclear school and Ministry policy, short duration of lessons and the number of pupils in class. The findings suggest the necessity of teacher training in dyslexia and the improvement of school and Ministry policy. 相似文献
110.
Judith L. Gersting 《Computer Science Education》2013,23(1):95-106
The University of Hawaii at Hilo began offering a B.S. degree in computer science via distance education in 1998. This program serves students on islands with no four-year educational institution.The experiences in planning for and teaching such a program are discussed, together with the technologies used and the outcomes to date. 相似文献