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   920篇
  免费   31篇
各国政治   53篇
工人农民   49篇
世界政治   100篇
外交国际关系   54篇
法律   410篇
中国政治   9篇
政治理论   262篇
综合类   14篇
  2023年   4篇
  2022年   4篇
  2021年   7篇
  2020年   19篇
  2019年   33篇
  2018年   29篇
  2017年   27篇
  2016年   31篇
  2015年   20篇
  2014年   24篇
  2013年   185篇
  2012年   27篇
  2011年   21篇
  2010年   22篇
  2009年   19篇
  2008年   37篇
  2007年   34篇
  2006年   34篇
  2005年   23篇
  2004年   20篇
  2003年   25篇
  2002年   24篇
  2001年   21篇
  2000年   15篇
  1999年   20篇
  1998年   8篇
  1997年   6篇
  1996年   9篇
  1995年   9篇
  1994年   11篇
  1993年   12篇
  1992年   11篇
  1991年   15篇
  1990年   8篇
  1989年   14篇
  1988年   7篇
  1987年   6篇
  1986年   15篇
  1985年   8篇
  1984年   16篇
  1983年   9篇
  1982年   9篇
  1981年   4篇
  1980年   5篇
  1979年   9篇
  1978年   7篇
  1977年   4篇
  1976年   3篇
  1967年   3篇
  1965年   2篇
排序方式: 共有951条查询结果,搜索用时 31 毫秒
91.
The aim of this paper is to provide an exploratory review of the extent to which some of the leading companies in the food and drinks industry are publicly addressing water stewardship as part of their corporate sustainability strategies. The paper begins with an introductory outline of the growing importance of water stewardship and a brief discussion of corporate sustainability. The paper draws its empirical material from the most recent information on water stewardship posted by the leading companies in the food and drinks industry's corporate websites. The findings reveal that the vast majority of the selected companies address a number of elements concerning water stewardship as part of their more general approach to corporate sustainability. However, corporate commitments to water stewardship can be interpreted as being driven as much by business imperatives as by any specific concerns for environmental sustainability or a genuine desire to maintain the viability and integrity of natural ecosystems. More critically, the authors suggest that the selected companies' commitments to water stewardship are framed within existing business models focused on technological improvements in eco‐efficiency and continuing economic growth. The paper provides an accessible review of the water stewardship issues being pursued by the leading players in the food and drinks industry, and as such, it will interest academics, students, political commentators and business managers interested in water stewardship and corporate sustainability. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
92.
93.
94.
95.
96.
Healthy male volunteers drank neat whisky in amounts corresponding to 0.51, 0.68, or 0.85 g ethanol/kg body weight in 15-25 min after an overnight (10 h) fast. Urine was collected immediately before drinking and then at 60 min intervals for 7-8 h after intake. The volumes of urine voided were measured and the concentrations of alcohol (UAC) were determined by an enzymatic method. Ethanol-induced diuresis showed large inter-subject variations. The flow of urine was maximum between 60 and 120 min post-drinking when the median rates of production were 117 ml/h (range 55-335), 113 ml/h (range 41-453) and 373 ml/h (range 215-485) for 0.51, 0.68, and 0.85 g ethanol/kg respectively. The output of urine returned to normal (30-60 ml/h) after the peak UAC had passed despite an elevated blood alcohol concentration (BAC). The average amount of alcohol excreted in urine was 0.29 g (S.D. 0.119), 0.44 g (S.D. 0.246), and 1.00 g (S.D. 0.427) after the consumption of 0.51, 0.68 and 0.85 g ethanol/kg respectively. Neither peak diuresis nor the amount of alcohol excreted depended on a subject's age between 20 and 60 years. This work shows that after drinking a moderate dose of alcohol, only 0.7-1.5% of the amount consumed is excreted unchanged in urine. Ethanol-induced diuresis is most pronounced for the first 1-2 h after drinking (rising BAC). The production of urine returns to normal during the post-absorptive state.  相似文献   
97.
98.
99.
This paper assesses the role of the United Nations in nuclear disarmament in the early postwar period and provides an explanation as to why its contribution was limited. It presents a framework of analysis concentrating particularly on the political organs of the UN. It is a view from within the World Organisation. It emphasises the difficulties the UN encountered in establishing its credentials in dealing with the requirements of the nuclear age. Finally, the paper examines the reasons of the failure of the negotiations which took place between 1945 and 1950.  相似文献   
100.
Evaluators have often had trouble providing analyses that are of practical use to policymakers. A major reason for this is that evaluators characteristically pay little attention to variables that are politically relevant. The National Institute of Education's evaluation of Title I of the Elementary and Secondary Education act, used extensively by Congress in 1977–1978, provides a clear example of how attention to political concerns can pay off for evaluators in increased utilization of their products.  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