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   37740篇
  免费   479篇
  国内免费   13篇
财政金融   6764篇
工业经济   2413篇
计划管理   5973篇
经济学   8467篇
综合类   842篇
运输经济   141篇
旅游经济   418篇
贸易经济   8293篇
农业经济   1010篇
经济概况   3283篇
信息产业经济   44篇
邮电经济   584篇
  2021年   151篇
  2020年   250篇
  2019年   373篇
  2018年   2631篇
  2017年   2397篇
  2016年   1597篇
  2015年   418篇
  2014年   556篇
  2013年   2238篇
  2012年   1025篇
  2011年   2499篇
  2010年   2325篇
  2009年   2128篇
  2008年   2172篇
  2007年   2438篇
  2006年   676篇
  2005年   962篇
  2004年   964篇
  2003年   1078篇
  2002年   747篇
  2001年   512篇
  2000年   496篇
  1999年   394篇
  1998年   442篇
  1997年   394篇
  1996年   409篇
  1995年   360篇
  1994年   357篇
  1993年   372篇
  1992年   357篇
  1991年   327篇
  1990年   308篇
  1989年   272篇
  1988年   218篇
  1987年   271篇
  1986年   271篇
  1985年   420篇
  1984年   408篇
  1983年   410篇
  1982年   327篇
  1981年   340篇
  1980年   289篇
  1979年   302篇
  1978年   242篇
  1977年   265篇
  1976年   226篇
  1975年   171篇
  1974年   150篇
  1973年   149篇
  1972年   99篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
91.
Poverty,population and environmental degradation in China   总被引:7,自引:0,他引:7  
Rozelle S  Huang J  Zhang L 《Food Policy》1997,22(3):229-251
This article examines the relationship between poverty, population, and environmental degradation in China. Environmental conditions include water pollution, deforestation, destruction of grasslands, soil erosion, and salinization. The authors review China's success in controlling environmental degradation through leadership, environmental policies, and institutional capacity. Findings suggest that environmental progress is best achieved indirectly by poverty alleviation, market integration, and population control. Government policies were not very effective. Degradation occurs due to limited financial resources, poorly trained personnel, and political factors. Control of water pollution was instituted since the 1980s. The levels of pollutants have been reduced, but the type of pollutant determines the seriousness of impact. Water pollution is due to industrial wastes, agricultural run-off, and soil erosion. Since the 1970s, reforestation targets have not been met. Technical extension and monitoring of planting is not available in most areas, and private, profit seeking interests control acreage. Grassland destruction is due to deforestation, agricultural expansion, and overgrazing. Independent regional authorities have successfully managed pasture programs. Erosion is the most serious in Loess Plateau, the Red Soils area, the Northeast China Plain, and the Northwest Grasslands, which comprise 70% of total land area. In 1990, erosion control was practiced in 39% of eroded land area. Salinization has remained fairly constant. Environmental controls (direct regulation, planned recovery, and state-mandated technological improvements) are uneven. The main tool for environmental management is the State Environmental Protection Commission and its executive unit, SEPA. Problems stem from vague laws, lack of means of enforcement, lack of coordination of laws, and lack of standards, schedules, and other provisions in ordinances.  相似文献   
92.
93.
94.
95.
96.
97.
98.
Belkin L 《Medical economics》1993,70(6):160-1, 165-8, 171-2 passim
  相似文献   
99.
This paper identifies the main issues that development in Transkei must address. These are job creation, food production and the upgrading of manpower productivity through appropriate education and training.

The first section gives statistical information on unemployment and food production. The second part discusses national development priorities and strategies as determined by the economic development planners and approved by the Government. The emphasis of the plan is small scale operations that can be operated and managed by the people themselves. The third section examines the development that is actually taking place against the approved national development priorities. Finally some of the policies and practices that are in conflict with what the country is seeking to achieve are highlighted.  相似文献   

100.
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