全文获取类型
收费全文 | 27407篇 |
免费 | 397篇 |
国内免费 | 136篇 |
专业分类
教育 | 18985篇 |
科学研究 | 3375篇 |
各国文化 | 235篇 |
体育 | 2294篇 |
综合类 | 17篇 |
文化理论 | 207篇 |
信息传播 | 2827篇 |
出版年
2021年 | 234篇 |
2020年 | 387篇 |
2019年 | 553篇 |
2018年 | 754篇 |
2017年 | 679篇 |
2016年 | 706篇 |
2015年 | 455篇 |
2014年 | 600篇 |
2013年 | 4774篇 |
2012年 | 557篇 |
2011年 | 624篇 |
2010年 | 488篇 |
2009年 | 441篇 |
2008年 | 496篇 |
2007年 | 500篇 |
2006年 | 477篇 |
2005年 | 440篇 |
2004年 | 453篇 |
2003年 | 429篇 |
2002年 | 402篇 |
2001年 | 644篇 |
2000年 | 523篇 |
1999年 | 480篇 |
1998年 | 253篇 |
1997年 | 286篇 |
1996年 | 300篇 |
1995年 | 274篇 |
1994年 | 262篇 |
1993年 | 237篇 |
1992年 | 370篇 |
1991年 | 379篇 |
1990年 | 394篇 |
1989年 | 433篇 |
1988年 | 355篇 |
1987年 | 364篇 |
1986年 | 363篇 |
1985年 | 432篇 |
1984年 | 362篇 |
1983年 | 341篇 |
1982年 | 291篇 |
1981年 | 277篇 |
1980年 | 260篇 |
1979年 | 383篇 |
1978年 | 304篇 |
1977年 | 281篇 |
1976年 | 234篇 |
1975年 | 228篇 |
1974年 | 239篇 |
1973年 | 232篇 |
1971年 | 199篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
972.
973.
Muhammad Farooq Naseer Manasa Patnam Reehana R. Raza 《Economics of Education Review》2010,29(4):669-683
This paper evaluates the impact of teaching innovations, introduced in public primary schools under the Children Resources International (CRI) Program, on student outcomes. We estimate students’ learning based on their scores on standardized tests. We match schools and children within the treatment and comparison group and find that the CRI Program has been effective in raising learning achievement. Moreover, the results are robust to unobserved selection bias. The average gain for a CRI student represents an improvement of 0.40 standard deviations. The results stay unchanged when we use alternative estimators for the treatment effect including the bias-corrected estimator proposed by Abadie and Imbens (2006). 相似文献
974.
975.
We present the process our institution used to create a statistics requirement for almost all incoming first‐year students. From conception and planning, to hiring and acceptance by the university community, we offer lessons learned should you consider making such a shift in your own curriculum. 相似文献
976.
V. R. Padmawar 《Resonance》2010,15(1):32-44
In this article we first try to answer the question posed in the title in the context of a real life situation. We suggest
sequential methods of selecting a member from a given set of individuals. We show that these methods indeed assign ‘equal
chance’ of being selected to all individuals. 相似文献
977.
Deborah Linebarger Jessica Taylor Piotrowski Charles R. Greenwood 《Journal of Research in Reading》2010,33(2):148-167
Children living in poverty are 1.3 times as likely as non‐poor children to experience reading difficulties and lack key oral experiences that contribute to early literacy development. The purpose of this research was to study the effects of viewing commercially available educational television with closed captions. Seventy second‐ and third‐grade economically disadvantaged children living in urban locations participated in this experimental research design. Children were randomly assigned to view videos with or without closed captions. Captions helped children recognise and read more words, identify the meaning of those words, generate inferences regarding programme content and transfer these skills to a normative code‐related skill task. Risk status moderated word recognition performance: those at risk benefited from captions while those who were not at risk recognised more words when captions were absent. 相似文献
978.
This article presents baseline information on the educational experiences, needs, and interests of a statewide sample of older adults with mental retardation. Data were collected through an interview with the older person with mental retardation and through a questionnaire sent to a knowledgeable other who was matched to each older adult. Findings are presented on previous educational experiences, current educational opportunities, and educational needs and interests. Results indicate that this group of older persons strongly desires continued opportunity for learning, particularly in academic and independent living areas. Two subgroups within this sample were least likely to have access to instructional opportunities: persons 55 years or older and persons living in community residences with less than 24‐hour care. Access to this instruction would improve the independence and quality of life of both these groups, as it would for the entire sample. Implications of the findings for educators in gerontology, mental retardation, and adult education are discussed. 相似文献
979.
Harriet L. Cohen Mark H. Sandel Cecilia L. Thomas Thomas R. Barton 《Educational gerontology》2013,39(4):329-346
During the coming years the number of older adults will increase dramatically, which will require a corresponding increase in the number of social workers who have accurate knowledge of this population. This article reports the impact focus groups with older adults and with service providers who work with older adults and their families have on baccalaureate social work (BSW) students. We find that BSW students exposed to focus groups have their negative attitudes about older adults and service providers deconstructed and replaced with more positive and accurate information about older adults. When students' misconceptions about older adults are confronted, they become more interested in choosing geriatric social work as a career option. 相似文献
980.