全文获取类型
收费全文 | 1920篇 |
免费 | 55篇 |
国内免费 | 4篇 |
专业分类
教育 | 1482篇 |
科学研究 | 119篇 |
各国文化 | 44篇 |
体育 | 114篇 |
综合类 | 2篇 |
文化理论 | 24篇 |
信息传播 | 194篇 |
出版年
2022年 | 11篇 |
2021年 | 25篇 |
2020年 | 28篇 |
2019年 | 43篇 |
2018年 | 54篇 |
2017年 | 51篇 |
2016年 | 64篇 |
2015年 | 40篇 |
2014年 | 74篇 |
2013年 | 478篇 |
2012年 | 36篇 |
2011年 | 44篇 |
2010年 | 32篇 |
2009年 | 42篇 |
2008年 | 51篇 |
2007年 | 44篇 |
2006年 | 47篇 |
2005年 | 44篇 |
2004年 | 34篇 |
2003年 | 32篇 |
2002年 | 41篇 |
2001年 | 16篇 |
2000年 | 14篇 |
1999年 | 23篇 |
1998年 | 14篇 |
1997年 | 25篇 |
1996年 | 20篇 |
1995年 | 27篇 |
1994年 | 16篇 |
1993年 | 24篇 |
1992年 | 16篇 |
1991年 | 24篇 |
1990年 | 21篇 |
1989年 | 29篇 |
1988年 | 25篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 23篇 |
1984年 | 20篇 |
1983年 | 29篇 |
1982年 | 27篇 |
1981年 | 19篇 |
1980年 | 17篇 |
1979年 | 18篇 |
1978年 | 24篇 |
1977年 | 18篇 |
1976年 | 10篇 |
1975年 | 14篇 |
1974年 | 18篇 |
1973年 | 13篇 |
排序方式: 共有1979条查询结果,搜索用时 31 毫秒
1.
In this paper, the authors discuss their grounded research carried out with teachers about the wellbeing of teachers. They explore the importance of making the concept of wellbeing more intimate and consider hedonic and eudaimonic ways of looking at wellbeing. They present a model of layered reflection which illuminates key factors that have an impact on the wellbeing of teachers. 相似文献
2.
Mike Cass Dennis Cates Michelle Smith Cynthia Jackson 《Learning disabilities research & practice》2003,18(2):112-120
Abstract. A multiple baseline design was employed to test the effect of manipulative instruction on the perimeter and area problem‐solving performance of middle and high school students who had been diagnosed with LD in the area of mathematics. Modeling, prompting/guided practice, and independent practice in conjunction with manipulative training were employed to teach both perimeter and area problem‐solving skills. Analysis of data revealed that the students rapidly acquired the problem‐solving‐skills, maintained these skills over a two‐month period, and transferred these skills to a paper and pencil problem‐solving format. This research extends previous findings by revealing that use of concrete manipulatives promotes the long‐term maintenance of skills. 相似文献
3.
4.
Frank Quinn 《Publishing Research Quarterly》1995,11(2):20-28
This article begins with an analysis of reliability and usability in the mathematical literature. Mathematical practice is
seen to be adapted to very high standards in these respects, and quite sensitive to even modest declines in quality. Unfortunately
most scenarios for the transition to electronic publication suggest serious loss of quality. This is a problem special to
mathematics: other sciences are adapted to lower standards, and should be much less sensitive to changes. Some ways to prevent
this decline are suggested.
A condensed version of this article appeared inNotices of the American Mathematical Society, 42, 1, January 1995. Published with permission of the American Mathematical Society. 相似文献
5.
6.
Zhao RL Desjardin DE Soytong K Hyde KD 《Journal of Zhejiang University. Science. B》2008,9(10):779-786
We present an overview of previous research results on the molecular phylogenetic analyses in Agaricales and its higher ranks (Agaricomycetes/Agaricomycotina/Basidiomycota) along with the most recent treatments of taxonomic systems in these taxa. Establishing phylogenetic hypotheses using DNA sequences, from which an understanding of the natural evolutionary relationships amongst clades may be derived, requires a robust dataset. It has been recognized that single-gene phylogenies may not truly represent organismal phylogenies, but the concordant phylogenetic genealogies from multiple-gene datasets can resolve this problem. The genes commonly used in mushroom phylogenetic research are summarized. 相似文献
7.
8.
9.
10.