首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   20216篇
  免费   110篇
财政金融   3378篇
工业经济   1015篇
计划管理   3187篇
经济学   4606篇
综合类   515篇
运输经济   54篇
旅游经济   121篇
贸易经济   5050篇
农业经济   112篇
经济概况   1670篇
信息产业经济   45篇
邮电经济   573篇
  2023年   26篇
  2021年   18篇
  2020年   49篇
  2019年   92篇
  2018年   2366篇
  2017年   2131篇
  2016年   1278篇
  2015年   151篇
  2014年   170篇
  2013年   509篇
  2012年   543篇
  2011年   2054篇
  2010年   1931篇
  2009年   1644篇
  2008年   1643篇
  2007年   1960篇
  2006年   175篇
  2005年   470篇
  2004年   574篇
  2003年   657篇
  2002年   347篇
  2001年   141篇
  2000年   145篇
  1999年   82篇
  1998年   101篇
  1997年   80篇
  1996年   79篇
  1995年   75篇
  1994年   56篇
  1993年   41篇
  1992年   42篇
  1991年   52篇
  1990年   52篇
  1989年   36篇
  1988年   29篇
  1987年   35篇
  1986年   49篇
  1985年   57篇
  1984年   42篇
  1983年   36篇
  1982年   59篇
  1981年   30篇
  1980年   37篇
  1979年   30篇
  1978年   24篇
  1977年   21篇
  1976年   18篇
  1975年   15篇
  1974年   16篇
  1973年   15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.
This article reports on one outcome from a three-year study with pre-service primary teachers at Goldsmiths' College, University of London. The purpose of the study was to evaluate the influence of participants' prior educational experience and beliefs about the relationship between design & technology (D&T) and science on their lesson planning for these subjects during school placements. Data from the study support a three-domain model of pre-service teachers' thinking and action. When operating within the pragmatic domain, participants are primarily concerned with survival in the classroom, resulting in short-term planning which may contradict their epistemological and curricular beliefs. In the pedagogical domain, the focus shifts from the pre-service teacher themselves and their immediate survival to the learning potential of the activities they plan. There is evidence that some participants have progressed to operating within a philosophical domain, leading to clasroom practice which reflects and re-conceptualises pre-service teachers' core beliefs about the nature of, and relationship between, D&T and science. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   
66.
Conclusion It has been argued that Design and Technology teachers would be helped by clear distinction between the terms, industry, business and economic. This would help to avoid the confusion between particular ways of viewing business (eg. through an economic concept such as profit maximisation;) and the multi-faceted character of the activity under observation. By this reasoning, the economic dimension of Design and Technology resides in the analysis of needs and the evaluation of products according to the value of the resources used up, and the value and distribution of the resources and products created. The link with discussion of value judgements in the subject (eg. Riggs and Conway, 1991) is very clear. So also is the dependence of this analysis on the definition of needs and evaluation and, crucially, the perceived relationship between the two, in learning and classroom practice.  相似文献   
67.
Luft zum Atmen     
Mehr Sicherheit im Umgang mit Trachealkanülen - Pflegende, die Patienten mit einer Trachealkanüle betreuen, müssen den Kanülenwechsel sicher beherrschen. Denn bei Komplikationen kann das Warten auf den Arzt katastrophale Folgen haben. Daher muss der Umgang mit den Kanülen zur Routine werden.  相似文献   
68.
There has been great focus in the recent trade theory literature on the introduction of firm heterogeneity into trade models. This introduction has highlighted the importance of the entry/exit decision of firms in response to changes in trade barriers. However, it is typical in many of these models to use iceberg transport costs as a general form of trade barriers that can be interchangeable with ad valorem tariffs. I show that this is not always an appropriate conclusion. Specifically, I illustrate that profit for an exporter is more elastic in response to tariffs than iceberg transport costs, which affects the entry/exit decision of firms. This has implications for welfare analysis and empirical specifications.  相似文献   
69.
Most extant work on prediction of banking crises has utilised global samples, which are in turn dominated by observations from middle-income countries, and rely on a single estimator. However, economic and financial structures as well as the pattern of shocks may differ substantially across regions, while a range of specifications is desirable to check robustness. Accordingly, in this paper we test the implicit pooling assumption in earlier multivariate work on Early Warning Systems using both logit and binary recursive tree specifications separately for crises in Asia and Latin America, as well as the pooled sample. Results suggest markedly different crisis determinants across regions, implying global samples are inappropriate.  相似文献   
70.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号