全文获取类型
收费全文 | 9392篇 |
免费 | 108篇 |
国内免费 | 18篇 |
专业分类
教育 | 6326篇 |
科学研究 | 1098篇 |
各国文化 | 90篇 |
体育 | 994篇 |
综合类 | 6篇 |
文化理论 | 97篇 |
信息传播 | 907篇 |
出版年
2021年 | 73篇 |
2020年 | 125篇 |
2019年 | 178篇 |
2018年 | 242篇 |
2017年 | 256篇 |
2016年 | 223篇 |
2015年 | 155篇 |
2014年 | 221篇 |
2013年 | 1692篇 |
2012年 | 203篇 |
2011年 | 199篇 |
2010年 | 174篇 |
2009年 | 156篇 |
2008年 | 171篇 |
2007年 | 194篇 |
2006年 | 163篇 |
2005年 | 153篇 |
2004年 | 150篇 |
2003年 | 170篇 |
2002年 | 142篇 |
2001年 | 163篇 |
2000年 | 161篇 |
1999年 | 159篇 |
1998年 | 76篇 |
1997年 | 77篇 |
1996年 | 109篇 |
1995年 | 79篇 |
1994年 | 97篇 |
1993年 | 87篇 |
1992年 | 155篇 |
1991年 | 146篇 |
1990年 | 137篇 |
1989年 | 137篇 |
1988年 | 114篇 |
1987年 | 116篇 |
1986年 | 138篇 |
1985年 | 134篇 |
1984年 | 107篇 |
1983年 | 129篇 |
1982年 | 111篇 |
1981年 | 104篇 |
1980年 | 93篇 |
1979年 | 167篇 |
1978年 | 111篇 |
1977年 | 109篇 |
1976年 | 104篇 |
1975年 | 79篇 |
1974年 | 89篇 |
1972年 | 70篇 |
1971年 | 70篇 |
排序方式: 共有9518条查询结果,搜索用时 31 毫秒
131.
132.
133.
Mark G. Simkin William L. Kuechler 《Decision Sciences Journal of Innovative Education》2005,3(1):73-98
Instructors can use both “multiple‐choice” (MC) and “constructed response” (CR) questions (such as short answer, essay, or problem‐solving questions) to evaluate student understanding of course materials and principles. This article begins by discussing the advantages and concerns of using these alternate test formats and reviews the studies conducted to test the hypothesis (or perhaps better described as the hope) that MC tests, by themselves, perform an adequate job of evaluating student understanding of course materials. Despite research from educational psychology demonstrating the potential for MC tests to measure the same levels of student mastery as CR tests, recent studies in specific educational domains find imperfect relationships between these two performance measures. We suggest that a significant confound in prior experiments has been the treatment of MC questions as homogeneous entities when in fact MC questions may test widely varying levels of student understanding. The primary contribution of the article is a modified research model for CR/MC research based on knowledge‐level analyses of MC test banks and CR question sets from basic computer language programming. The analyses are based on an operationalization of Bloom's Taxonomy of Learning Goals for the domain, which is used to develop a skills‐focused taxonomy of MC questions. However, we propose that their analyses readily generalize to similar teaching domains of interest to decision sciences educators such as modeling and simulation programming. 相似文献
134.
Adults are typically required to make values‐based decisions multiple times each day.Why, then, should a discussion of values not be explicit across the college curriculum and intentionally integrated into the cocurriculum? The authors describe a place where the work of values education is widely shared. 相似文献
135.
B.M. Thompson K.P. Ribera G.J. Wingenbach T.A. Vestal 《Journal of Food Science Education》2007,6(2):24-29
ABSTRACT: The purpose of this study was to use a validated instrument to determine the attitudes and knowledge of high school teachers regarding food irradiation, and to determine the correlations among their knowledge and attitudes and certain demographic variables. Knowledge and attitudes about food irradiation were measured in selected high school family and consumer sciences teachers ( n = 121) who taught Food and Nutrition, Food Science and Technology, and/or Food Production Management and Services, via a 24-item instrument with 6 factors. Results revealed these teachers held neutral to positive attitudes about the safety of irradiated foods, their perception of the risk of foodborne illness, and learning about food irradiation, and neutral to negative perceptions of their understanding of food irradiation and their competence to teach about it. These teachers had a moderate knowledge base regarding food irradiation. Teachers' attitudes regarding the safety of food irradiation were positively correlated with their perceived understanding of food irradiation, actual knowledge of it, and competence to teach about it. Their perceived understanding of food irradiation was positively correlated with competence to teach about it, knowledge, and attitudes toward the safety of food irradiation. The only demographic variable correlated with knowledge or attitudes was teachers' previous food irradiation educational experiences. These data suggest the importance of education for family and consumer sciences teachers concerning food irradiation. 相似文献
136.
G. Marimuthu 《Resonance》1996,1(5):40-48
Bats are capable of avoiding obstacles that they encounter, even in complete darkness. This is because they emit ultrasound (high frequency sound) and analyse the echo produced when the sound hits objects on their path. This article describes the hunting flight of bats and how echolocation is useful in prey capture. Prey capture without the aid of echolocation by some bats is also described. 相似文献
137.
138.
Rajput ZI Hu SH Arijo AG Habib M Khalid M 《Journal of Zhejiang University. Science. B》2005,6(11):1057-1062
INTRODUCTION The world population of buffaloes(Bubalus bubalis)has been estimated at over172million head,more than97%(167.6million)of which are in Asia and the Pacific region,mainly in India(97.7million)and Pakistan(25.5million)(FAO,2004).About98%of buffaloes in the region are raised by small farmers owning less than two hectares of land and less than five buffaloes(Mudgal,1992).In general,the water buffalo is regarded as more productive,healthier and more useful than the cow,especiall… 相似文献
139.
140.