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   30252篇
  免费   942篇
  国内免费   5篇
各国政治   1311篇
工人农民   1197篇
世界政治   2108篇
外交国际关系   1026篇
法律   18729篇
中国共产党   6篇
中国政治   228篇
政治理论   6293篇
综合类   301篇
  2020年   367篇
  2019年   462篇
  2018年   602篇
  2017年   681篇
  2016年   683篇
  2015年   517篇
  2014年   544篇
  2013年   2910篇
  2012年   736篇
  2011年   821篇
  2010年   684篇
  2009年   745篇
  2008年   818篇
  2007年   870篇
  2006年   852篇
  2005年   788篇
  2004年   763篇
  2003年   799篇
  2002年   717篇
  2001年   1120篇
  2000年   944篇
  1999年   817篇
  1998年   460篇
  1997年   344篇
  1996年   374篇
  1995年   351篇
  1994年   377篇
  1993年   377篇
  1992年   585篇
  1991年   660篇
  1990年   632篇
  1989年   583篇
  1988年   601篇
  1987年   575篇
  1986年   626篇
  1985年   600篇
  1984年   521篇
  1983年   511篇
  1982年   381篇
  1981年   375篇
  1980年   305篇
  1979年   380篇
  1978年   260篇
  1977年   245篇
  1976年   239篇
  1975年   232篇
  1974年   267篇
  1973年   218篇
  1972年   210篇
  1969年   191篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Kornai's thesis that shortage results from demand expansions bred by the soft budget constraint, derives from his implicit assumption that price regimes of input and output firms are different. Since any firm is both an input and an output firm, which discards the assumption as logically untenable, excess demand can only turn up because of lower than contracted inputs of labor and management that are not offset by an adequate downward adjustment of earnings. Expansions of demand that appear to be autonomous, are incited by uncertain deliveries of inputs, that is, by inefficiency (of output firms) as well. A by far the largest part of excess demand can be explained by state preferences for fast growth. As planners are more successful in generating investment, and the ensuing consumer, demand than in expanding production, shortage is inevitable regardless of the character of the firms' budget constraints.  相似文献   
82.
83.
84.
85.
86.
The remains of an unidentified female neonate were discovered in a field in central Missouri. Examination revealed bilateral absence of the parietal bones. A search of the literature describing similar defects suggests that the present case represents a unique condition, described here for the first time.  相似文献   
87.
88.
89.
90.
Based on interviews with facility managers in the electroplating and chemical industries, this study examines regulated firms’ perceptions of how various instrumental, normative, and social factors motivated their firms’ environmental actions. We found that “implicit general deterrence” (the overall effect of sustained inspection and enforcement activity) was far more important than either specific or general deterrence, and that deterrence in any form was of far greater concern to small and medium‐sized enterprises than it was to large ones. Most reputation‐sensitive firms in the environmentally sensitive chemical industry chose to go substantially beyond compliance for reasons that related to risk management and to the perceived need to protect their social license to operate. Almost half our respondents also provided normative explanations for why they complied. Overall, we conclude that there are various, often interwoven, strands that must be taken into account in understanding what motivates corporate environmental behavior, and how they play out depends very much on the size and sophistication of companies themselves and on the characteristics of the industry sector within which they are located.  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