全文获取类型
收费全文 | 14557篇 |
免费 | 75篇 |
国内免费 | 119篇 |
专业分类
教育 | 10756篇 |
科学研究 | 1801篇 |
各国文化 | 18篇 |
体育 | 553篇 |
综合类 | 176篇 |
文化理论 | 391篇 |
信息传播 | 1056篇 |
出版年
2024年 | 2篇 |
2023年 | 9篇 |
2022年 | 59篇 |
2021年 | 94篇 |
2020年 | 100篇 |
2019年 | 87篇 |
2018年 | 2211篇 |
2017年 | 2141篇 |
2016年 | 1633篇 |
2015年 | 219篇 |
2014年 | 275篇 |
2013年 | 340篇 |
2012年 | 421篇 |
2011年 | 909篇 |
2010年 | 1033篇 |
2009年 | 587篇 |
2008年 | 799篇 |
2007年 | 1309篇 |
2006年 | 240篇 |
2005年 | 525篇 |
2004年 | 552篇 |
2003年 | 486篇 |
2002年 | 266篇 |
2001年 | 133篇 |
2000年 | 110篇 |
1999年 | 34篇 |
1998年 | 23篇 |
1997年 | 26篇 |
1996年 | 21篇 |
1995年 | 19篇 |
1994年 | 7篇 |
1993年 | 4篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1989年 | 6篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 6篇 |
1984年 | 8篇 |
1983年 | 2篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1979年 | 5篇 |
1978年 | 2篇 |
1976年 | 5篇 |
1975年 | 2篇 |
1973年 | 4篇 |
1971年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
963.
Palani Damotharan Anguchamy Veeruraj Muthuvel Arumugam Thangavel Balasubramanian 《Indian journal of clinical biochemistry : IJCB》2016,31(1):57-67
This study is designed to isolate and purify a novel anti-clotting protein component from the venom of Enhydrina schistosa, and explore its biochemical and biological activities. The active protein was purified from the venom of E. schistosa by ion-exchange chromatography using DEAE-cellulose. The venom protein was tested by various parameters such as, proteolytic, haemolytic, phospholipase and anti-coagulant activities. 80 % purity was obtained in the final stage of purification and the purity level of venom was revealed as a single protein band of about 44 kDa in SDS-polyacrylamide electrophoresis under reducing conditions. The results showed that the Potent hemolytic activity was observed against cow, goat, chicken and human (A, B and O positive) erythrocytes. Furthermore, the clotting assays showed that the venom of E. schistosa significantly prolonged in activated partial thromboplastin time, thrombin time, and prothrombin time. Venomous enzymes which hydrolyzed casein and gelatin substrate were found in this venom protein. Gelatinolytic activity was optimal at pH 5–9 and 1H NMR analysis of purified venom was the base line information for the structural determination. These results suggested that the E. schistosa venom holds good promise for the development of novel lead compounds for pharmacological applications in near future. 相似文献
964.
Patrocinio Zaragoza-Sáez Enrique Claver-Cortés Bartolomé Marco-Lajara Mercedes Úbeda-García 《知识管理研究与实践》2016,14(4):489-501
Knowledge creation is one of the most important dynamic capabilities that firms can use to develop new assets, which can represent the basis for future innovations. Within a context of growing globalisation, the acquisition and creation of knowledge is one of the main objectives sought with international expansion. The consideration of intellectual capital within the knowledge creation process in subsidiaries offers an innovative way to undertake knowledge management practices in multinationals. Theoretical and empirical works can be found in the literature about intellectual capital. However, very few studies link intellectual capital to knowledge creation in multinationals. Seeking to fill this gap, the purpose of this paper is to develop and test a model that includes the main intangibles belonging to structural and relational capital that can influence knowledge creation in Spanish subsidiaries of foreign multinational firms belonging to high-technology and knowledge-intensive sectors. Theoretical, empirical and managerial contributions result from this paper. 相似文献
965.
Are preservice teachers prepared to teach struggling readers? 总被引:1,自引:0,他引:1
Reading disabilities such as dyslexia, a specific learning disability that affects an individual’s ability to process written
language, are estimated to affect 15–20% of the general population. Consequently, elementary school teachers encounter students
who struggle with inaccurate or slow reading, poor spelling, poor writing, and other language processing difficulties. However,
recent evidence may suggest that teacher preparation programs are not providing preservice teachers with information about
basic language constructs and other components related to scientifically based reading instruction. As a consequence preservice
teachers have not exhibited explicit knowledge of such concepts in previous studies. Few studies have sought to assess preservice
teachers’ knowledge about dyslexia in conjunction with knowledge of basic language concepts. The purpose of the present study
was to examine elementary school preservice teachers’ knowledge of basic language constructs and their perceptions and knowledge
about dyslexia. Findings from the present study suggest that preservice teachers, on average, are able to display implicit
skills related to certain basic language constructs (i.e., syllable counting), but fail to demonstrate explicit knowledge
of others (i.e., phonics principles). Also, preservice teachers seem to hold the common misconception that dyslexia is a visual
perception deficit rather than a problem with phonological processing. Implications for future research as well as teacher
preparation are discussed. 相似文献
966.
Multicultural service learning (MSL) seeks to develop pre-service teachers’ capacities and commitment to teach diverse student populations. We use multiple regression analyses of survey data collected from 212 pre-service teachers engaged in 22 MSL sites to assess the effects of pre-service teachers’ social identities, MSL contexts, and university pedagogy on pre-service teachers’ awareness of cultural bias, understanding of social inequality, and commitment to teaching diverse students. We find that pedagogical engagement positively contributes to all three outcomes. Pre-service teacher’s social identities and MSL contextual factors, however, have variable effects. We explore the pedagogical and research implications of this multidimensionality. 相似文献
967.
Adrianna Kezar 《Innovative Higher Education》2011,36(4):235-247
This article examines a common problem in higher education – how to create more widespread use of improved practices, often
commonly referred to as innovations. I argue that policy models of scale-up are often advocated in higher education but that
they have a dubious history in community development and K-12 education and that higher education leaders should shirk policymakers’
push to use a scale-up model of change. These thoughts are conceptual and are based upon a critical review of literature in
community development and K-12, but I also draw upon empirical data in reviewing examples of widespread use of innovations
in higher education. 相似文献
968.
969.
970.