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   13248篇
  免费   165篇
财政金融   2337篇
工业经济   970篇
计划管理   2256篇
经济学   2717篇
综合类   94篇
运输经济   86篇
旅游经济   187篇
贸易经济   2042篇
农业经济   727篇
经济概况   1952篇
信息产业经济   1篇
邮电经济   44篇
  2021年   86篇
  2020年   127篇
  2019年   207篇
  2018年   283篇
  2017年   259篇
  2016年   272篇
  2015年   165篇
  2014年   276篇
  2013年   1189篇
  2012年   374篇
  2011年   371篇
  2010年   313篇
  2009年   375篇
  2008年   358篇
  2007年   323篇
  2006年   308篇
  2005年   258篇
  2004年   262篇
  2003年   267篇
  2002年   268篇
  2001年   235篇
  2000年   272篇
  1999年   232篇
  1998年   219篇
  1997年   201篇
  1996年   210篇
  1995年   188篇
  1994年   205篇
  1993年   204篇
  1992年   220篇
  1991年   214篇
  1990年   225篇
  1989年   184篇
  1988年   152篇
  1987年   156篇
  1986年   178篇
  1985年   253篇
  1984年   231篇
  1983年   197篇
  1982年   202篇
  1981年   204篇
  1980年   194篇
  1979年   191篇
  1978年   167篇
  1977年   154篇
  1976年   148篇
  1975年   150篇
  1974年   119篇
  1973年   115篇
  1972年   106篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
831.
832.
833.
This article examines the use of business incubators to enhance industrial innovation and new venture formation. Currently, the number of business incubators is rapidly growing. Yet, we have little solid evidence that such centers actually stimulate the growth and success of either innovations or new ventures. Gerald Udell examines incubators' resources and services in an effort to assess their potential impact. He conducted a survey of two hundred incubators and linked the results to a partial review of the literature to aid in the assessment of business incubators.  相似文献   
834.
835.
Household rainwater features were examined in the high rainfall Inadi ward, in the Vulindlela district of KwaZulu. The aim of the investigation was to determine the present status of rainwater collection equipment at private houses, with a view to upgrading such facilities as an interim source of water for potable and general purposes. The survey showed that galvanized roofs in general were in reasonable condition, although gutters and storage vessels were inadequate and were often in a poor state of repair. It is important to note that the data revealed acceptance of rainwater collection as a supplementary water supply source.  相似文献   
836.
837.
838.
839.
In the past year, the South African Government has committed itself to ‘developing’ the informal sector as a strategy to ease the unemployment crisis and to aid the underemployed. In this paper, the author examines both the lives of self‐employed car‐washers and car‐washing as an activity within the informal sector. He argues that many ‘marginalised’ people who eke out a subsistence in the lower echelons of the informal sector in South Africa regard themselves as lumpenproletariat (or ‘wage‐labourers‐in‐waiting') and not dynamic entrepreneurs. These people expect the Government to intervene in the process of their transition to proletarianism. Further, activities such as car‐washing offer no prospects for self‐advancement.  相似文献   
840.
A free market for sugar is simulated. Results indicate that area under sugar‐cane would decrease by 49 per cent and labour employment by 26 per cent relative to the actual situation. Sugar‐cane would only be produced in areas with a comparative advantage. No sugar would be exported. Ethanol production from sugar‐cane would only occur with government price supports which would lead to an increase in the price of edible sugar. Development costs per additional worker employed of a one billion litre ethanol industry would amount to about R35 300 compared with over one million rand for a new petroleum from coal plant (Sasol).  相似文献   
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