全文获取类型
收费全文 | 8535篇 |
免费 | 74篇 |
国内免费 | 8篇 |
专业分类
教育 | 5806篇 |
科学研究 | 1114篇 |
各国文化 | 50篇 |
体育 | 607篇 |
综合类 | 3篇 |
文化理论 | 53篇 |
信息传播 | 984篇 |
出版年
2022年 | 54篇 |
2021年 | 101篇 |
2020年 | 133篇 |
2019年 | 180篇 |
2018年 | 295篇 |
2017年 | 269篇 |
2016年 | 264篇 |
2015年 | 159篇 |
2014年 | 269篇 |
2013年 | 1381篇 |
2012年 | 207篇 |
2011年 | 236篇 |
2010年 | 201篇 |
2009年 | 182篇 |
2008年 | 224篇 |
2007年 | 188篇 |
2006年 | 170篇 |
2005年 | 153篇 |
2004年 | 173篇 |
2003年 | 126篇 |
2002年 | 131篇 |
2001年 | 194篇 |
2000年 | 200篇 |
1999年 | 180篇 |
1998年 | 94篇 |
1997年 | 127篇 |
1996年 | 106篇 |
1995年 | 75篇 |
1994年 | 96篇 |
1993年 | 68篇 |
1992年 | 164篇 |
1991年 | 124篇 |
1990年 | 116篇 |
1989年 | 144篇 |
1988年 | 127篇 |
1987年 | 102篇 |
1986年 | 107篇 |
1985年 | 108篇 |
1984年 | 79篇 |
1983年 | 92篇 |
1982年 | 60篇 |
1981年 | 72篇 |
1980年 | 61篇 |
1979年 | 103篇 |
1978年 | 66篇 |
1977年 | 63篇 |
1976年 | 55篇 |
1975年 | 50篇 |
1974年 | 60篇 |
1973年 | 56篇 |
排序方式: 共有8617条查询结果,搜索用时 15 毫秒
151.
R. K. Upadhyay S. K. Gaur V. P. Agrawal K. C. Arora 《European Journal of Engineering Education》2007,32(1):21-33
Quality assurance in engineering education is a multifaceted problem further augmented by the stakeholders of engineering education. Students, parents and employers are rightfully questioning the quality of the curriculum, the instructional delivery, the learning environment, accessibility to learning technologies and equipment, employability as well as the possibilities of lifelong learning and the improvement of knowledge (Karapetrovic 2002). The purpose of the study is, therefore, to identify the parameters that influence the quality of an engineering education system and develop an integrated model of hierarchical structuring and a concept map for pre-identified concept elements through a process of iterative-interactive consensus-driven methodology, as advocated by second-generation system design paradigm for evolving knowledge scenario of concepts related to quality engineering education. 相似文献
152.
Austin H. Johnson Taryn S. Goldberg Rachel L. Hinant Lauren K. Couch 《Psychology in the schools》2019,56(3):360-377
Functional Behavior Assessments (FBAs) utilize direct and indirect methods to collect data on student behavior to generate a functional hypothesis and drive intervention development. School psychologists are trained to conduct FBAs and use them regularly in schools. However, no evidence exists describing the specific practices used by school psychologists when they conduct FBAs. In this study, 199 respondents completed a web‐based survey developed using expert review and cognitive pretesting. Most respondents reported their gender as female (87%), were between 30 and 39 years old (50%), and practiced at the Specialist level (57%). Respondents reported receiving training in FBA across multiple sources and utilizing multi‐method data collection methods when conducting FBAs. A large amount of variability was observed in the specific instruments used by school psychologists, with a substantial proportion using forms that were not standardized or pre‐constructed. Implications for current practitioners, trainers, and researchers are described. 相似文献
153.
154.
Living birds are unique among vertebrates in the formation of a female-specific bone tissue called medullary bone (MB) that is strictly associated with reproductive activity. MB is a rapidly mobilized source of calcium and phosphorus for the production of eggshell. Among living taxa, its skeletal distribution can be highly extensive such that it even exists in the ribs of some species. Due to its ephemeral nature, MB is rarely fossilized and so little is understood with regard to the origin of MB and its skeletal distribution in early taxa. Here we describe a new Early Cretaceous enantiornithine bird, Mirusavis parvus, gen. et. sp. nov., indicating that skeleton-wide distribution of MB appeared early in avian evolution. We suggest that this represents the plesiomorphic condition for the Aves and that the distribution of MB observed among extant neornithines is a product of increased pneumatization in this lineage and natural selection for more efficient distribution of MB. 相似文献
155.
156.
Ivor K. Davies 《Performance Improvement Quarterly》1994,7(3):103-114
Faced with sophisticated global competition, companies arc busily reinventing themselves. This offers an opportunity for performance technologists t.o re-think the value added component of their contribution to enhanc-ing human performance. In this eval u-ation. the four values of speed, simplicity, stretch, and self-conlidenco assume a central role. Design, as in the past, is key, but design must, be founded on the assumption that all human performance involves a process or combination of processes. Furthermore, processes are subject to variability of one kind or another, variability that is either predictable or random. It is argued that a process orientation, rather than a focus on inputs and outputs, offers performance technologists a more direct way of contributing to the realization of key business goals and more effectively focuses training and development on performance issues. Process re-design is a key strategy in the realization of these two goals. 相似文献
157.
158.
159.
160.
Minerva - This paper aims to explore disciplinary variation in valuation practices by comparing the way research groups accumulate credibility across four epistemic cultures. Our analysis is based... 相似文献