全文获取类型
收费全文 | 7969篇 |
免费 | 410篇 |
国内免费 | 8篇 |
专业分类
教育 | 6595篇 |
科学研究 | 331篇 |
各国文化 | 178篇 |
体育 | 457篇 |
综合类 | 1篇 |
文化理论 | 53篇 |
信息传播 | 772篇 |
出版年
2022年 | 25篇 |
2021年 | 85篇 |
2020年 | 127篇 |
2019年 | 239篇 |
2018年 | 271篇 |
2017年 | 324篇 |
2016年 | 244篇 |
2015年 | 269篇 |
2014年 | 317篇 |
2013年 | 2100篇 |
2012年 | 273篇 |
2011年 | 273篇 |
2010年 | 268篇 |
2009年 | 258篇 |
2008年 | 297篇 |
2007年 | 223篇 |
2006年 | 210篇 |
2005年 | 190篇 |
2004年 | 179篇 |
2003年 | 125篇 |
2002年 | 128篇 |
2001年 | 103篇 |
2000年 | 107篇 |
1999年 | 105篇 |
1998年 | 98篇 |
1997年 | 73篇 |
1996年 | 105篇 |
1995年 | 85篇 |
1994年 | 83篇 |
1993年 | 73篇 |
1992年 | 80篇 |
1991年 | 67篇 |
1990年 | 85篇 |
1989年 | 62篇 |
1988年 | 57篇 |
1987年 | 47篇 |
1986年 | 49篇 |
1985年 | 54篇 |
1984年 | 40篇 |
1983年 | 35篇 |
1982年 | 50篇 |
1981年 | 50篇 |
1980年 | 42篇 |
1979年 | 32篇 |
1978年 | 33篇 |
1977年 | 24篇 |
1976年 | 28篇 |
1975年 | 21篇 |
1974年 | 27篇 |
1973年 | 20篇 |
排序方式: 共有8387条查询结果,搜索用时 15 毫秒
51.
52.
The current study deals with the development of system thinking skills at the junior high school level. The sample population included about 50 eighth‐grade students from two different classes of an urban Israeli junior high school who studied an earth systems‐based curriculum that focused on the hydro cycle. The study addressed the following research questions: (a) Could the students deal with complex systems?; (b) What has influenced the students' ability to deal with system perception?; and (c) What are the relationship among the cognitive components of system thinking? The research combined qualitative and quantitative methods and involved various research tools, which were implemented in order to collect the data concerning the students' knowledge and understanding before, during, and following the learning process. The findings indicated that the development of system thinking in the context of the earth systems consists of several sequential stages arranged in a hierarchical structure. The cognitive skills that are developed in each stage serve as the basis for the development of the next higher‐order thinking skills. The research showed that in spite of the minimal initial system thinking abilities of the students most of them made some meaningful progress in their system thinking skills, and a third of them reached the highest level of system thinking in the context of the hydro cycle. Two main factors were found to be the source of the differential progress of the students: (a) the students' individual cognitive abilities, and (b) their level of involvement in the knowledge integration activities during their inquiry‐based learning both indoors and outdoors. © 2005 Wiley Periodicals, Inc. 相似文献
53.
54.
55.
What makes marking reliable? Experiments with UK examinations 总被引:2,自引:0,他引:2
56.
Curt J. Dommeyer Paul Baum Kenneth S. Chapman Robert W. Hanna 《Assessment & Evaluation in Higher Education》2002,27(5):455-462
Business professors were surveyed to determine their attitudes towards two methods of collecting students' teaching evaluations of faculty--the traditional paper-and-pencil method conducted in class and the online method conducted via the Internet. Faculty preferred the traditional paper method, mainly because they believed it would produce a higher and more accurate response than the online method. Faculty characteristics were examined to determine whether they were related to attitudes towards the online method of collecting teaching evaluations. No characteristics were found to be significantly associated with attitudes towards the online method. Suggestions for future researchers are offered. 相似文献
57.
58.
Two large independent sources of data, NSF's University Science Statistics Program Integrated Data Base and CHI Research's bibliometric data base, are brought together in a comprehensive study of the relationships among research resources, as measured by R&D expenditures, and research output, as measured by the quantity and visibility of scientific journal articles. The study is based on approximately 500 U.S. colleges and universities. For each of 11 fields of science, there is strong indication of a linear relationship between R&D expenditures and number of papers. The evidence also indicates a positive relationship between number of cites received per paper and number of papers published, but only for papers published in the basic research journals of the fields of chemistry, physics, and biology. 相似文献
59.
60.