全文获取类型
收费全文 | 40333篇 |
免费 | 743篇 |
专业分类
财政金融 | 6796篇 |
工业经济 | 2368篇 |
计划管理 | 6742篇 |
经济学 | 9632篇 |
综合类 | 685篇 |
运输经济 | 237篇 |
旅游经济 | 397篇 |
贸易经济 | 8372篇 |
农业经济 | 1202篇 |
经济概况 | 3962篇 |
信息产业经济 | 46篇 |
邮电经济 | 637篇 |
出版年
2023年 | 145篇 |
2021年 | 192篇 |
2020年 | 358篇 |
2019年 | 556篇 |
2018年 | 2820篇 |
2017年 | 2645篇 |
2016年 | 1792篇 |
2015年 | 512篇 |
2014年 | 761篇 |
2013年 | 2850篇 |
2012年 | 1283篇 |
2011年 | 2686篇 |
2010年 | 2500篇 |
2009年 | 2268篇 |
2008年 | 2183篇 |
2007年 | 2421篇 |
2006年 | 708篇 |
2005年 | 926篇 |
2004年 | 915篇 |
2003年 | 1017篇 |
2002年 | 678篇 |
2001年 | 580篇 |
2000年 | 519篇 |
1999年 | 424篇 |
1998年 | 500篇 |
1997年 | 433篇 |
1996年 | 439篇 |
1995年 | 372篇 |
1994年 | 377篇 |
1993年 | 359篇 |
1992年 | 365篇 |
1991年 | 384篇 |
1990年 | 346篇 |
1989年 | 258篇 |
1988年 | 265篇 |
1987年 | 269篇 |
1986年 | 261篇 |
1985年 | 361篇 |
1984年 | 358篇 |
1983年 | 333篇 |
1982年 | 287篇 |
1981年 | 286篇 |
1980年 | 286篇 |
1979年 | 277篇 |
1978年 | 228篇 |
1977年 | 185篇 |
1976年 | 182篇 |
1975年 | 163篇 |
1974年 | 150篇 |
1973年 | 151篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
66.
Eric F. Parkinson 《International Journal of Technology and Design Education》2004,14(3):219-243
Construction kits have played a significant part in nurturing the growth and development of the minds and manipulation-based
skills of children (and adults) in formal and non-formal education settings. These kits have origins rooted in the representation
of the built world and now have a diversity of form and function, including technical versions with moving parts. This article
examines some of the historically based ideas that lie behind the role that kits may have in terms of physical modelling.
The article traces the transformation of kits from simple bricks and blocks into more complicated pieces for space-filling
and achieving the transfer of forces and motion. This transformation occurred during the Victorian era when the influence
of the ideas of educationalists and, perhaps rather strangely, exponents of early aviation, played major roles in determining
the diversity of forms of construction kit and modelled possibilities that are now to be seen in classrooms and homes. The
article ends with a review of some of the lessons from the past and present that will need to be considered in relation to
concrete modelling in schools for the future.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
67.
Karin M. Ekstrm Marianne P. Ekstrm Marina Potapova Helena Shanahan 《International Journal of Consumer Studies》2003,27(4):294-301
The purpose of this article is to describe how households in Novgorod the Great, Russia, deal with food provision in everyday life. The study focuses on changes experienced in food provision and consumption in Russian society, in order to illustrate how households respond to the transformation towards a market economy. The study reflects women's perspective on food provision. Students from Novgorod the Great visited 105 households and asked the women in the household to answer a questionnaire. Results from the study show that in order to cope with changes in society related to economic reforms, Russian households had changed both their food consumption and food production patterns. There was no big difference between urban and rural households. Nearly all of the households were self‐sufficient in the provision of vegetables and potatoes. Many households had a ‘dacha’ (plot), where they produced most of what they needed. Among the changes experienced during recent years (i.e. during the end of the 1990s), a decade after perestroika was initiated, households mentioned the rise in food prices and the decrease of income. Households reported that they consumed less fruit and/or meat. Some households also mentioned that the quality of nourishment had decreased, thereby indicating lower general quality, lower nutrition value, or less healthy foodstuffs. 相似文献
68.
This paper examines the influence of institutional differences on corporate risk management practices in the USA and the Netherlands. We compare results to surveys in each country using a strategy that corrects for differences over industry and size classes across the Dutch and US samples. We document several differences in the firms’ uses and attitudes towards derivatives and attempt to attribute them to the differences in the institutional environments between the USA and the Netherlands. We find that institutional differences appear to have an important impact on risk management practices and derivatives use across US and Dutch firms. 相似文献
69.
70.
Calvyn Potgieter 《International Journal of Technology and Design Education》2004,14(3):205-218
In this article the impact of technology education, as a new learning area (subject) in the curriculum, on in-service teacher
education in South Africa is described in order to ascertain the extent of the impact. The research on which this article
is based draws on a variety of experiences and observations in the field at grassroots level (in particular an outreach project
in rural communities). The envisaged impact of technology education on South African schools, communities, teacher educators
and teachers, the range of in-service teacher education that is required, and the impacts in urban and rural areas are discussed.
Finally a number of concluding remarks are made about the extent of the impact of the inclusion of technology education in
the new National Curriculum Statement and whether the situation has changed since the implementation of a pilot technology
education project in 1998.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献