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   67744篇
  免费   3309篇
各国政治   4525篇
工人农民   2867篇
世界政治   5999篇
外交国际关系   3860篇
法律   31297篇
中国共产党   9篇
中国政治   750篇
政治理论   20793篇
综合类   953篇
  2021年   410篇
  2020年   1168篇
  2019年   1541篇
  2018年   1681篇
  2017年   1980篇
  2016年   2165篇
  2015年   1840篇
  2014年   2120篇
  2013年   10657篇
  2012年   1596篇
  2011年   1721篇
  2010年   1827篇
  2009年   2086篇
  2008年   1732篇
  2007年   1713篇
  2006年   1886篇
  2005年   1773篇
  2004年   1673篇
  2003年   1479篇
  2002年   1524篇
  2001年   1431篇
  2000年   1237篇
  1999年   1131篇
  1998年   1083篇
  1997年   970篇
  1996年   944篇
  1995年   912篇
  1994年   908篇
  1993年   938篇
  1992年   918篇
  1991年   947篇
  1990年   897篇
  1989年   943篇
  1988年   945篇
  1987年   968篇
  1986年   925篇
  1985年   1026篇
  1984年   913篇
  1983年   969篇
  1982年   884篇
  1981年   841篇
  1980年   659篇
  1979年   677篇
  1978年   594篇
  1977年   524篇
  1976年   490篇
  1975年   408篇
  1974年   413篇
  1973年   426篇
  1972年   368篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Diversity in communications is most appropriately understood as a free flow of ideas. In order to implement diversity, a comprehensive model of the communication process must be used for policy research, so that the various participants in the process can be properly restrained from abridging the free flow of ideas. The setting of priorities for implementing diversity has been illustrated using available studies of broadcast and cable television.  相似文献   
992.
993.
Population experts appear to be reaching a consensus that there has been a perceptible decline over the last decade in the growth of the world's population. The decline is accounted for by the "new demographic transition" in the less developed countries (LDCs). The decline in fertility rates began in the 1950s in some LDCs and became more widespread during the 1970s. The process has not yet begun in many of the LDCs. During the 1960s it was observed that the declines in birth rates (to levels of 30 of less per 1000) were occurring mostly in small countries. Many of these countries were islands with levels of social and economic development above the developing country average. The key question is whether the recent downward trend in fertility in LDCs will continue, stabilize at the current level, or rise again. A primary concern about the future is that the poorer and less developed countries will end up with an increasing share of the world's population, with the share of the developed countries declining from 34% to 22% over the 1950-2000 period. Considerable differential exists in demographic growth patterns among various regions. The 12 largest LDCs (China, India, Indonesia, Brazil, Bangladesh, Pakistan, Nigeria, Mexico, Vietnam, Philippines, Thailand, Turkey) contain 55% of the current world population, and the fertility decline of these nations is expected to have the maximum impact. 7 of these countries have had fertility declines of 14-35%. The force of the "population momentum" must also be considered. Most developing country populations have a young age distribution with considerable potential for population growth even after the fertility level reaches a replacement level and the net reproduction rate equals 1.  相似文献   
994.
995.
996.
997.
998.
999.
1000.
An employer's capacity successfully to survive a strike will depend largely on the extent to which it has anticipated the strike and taken the steps necessary to defend against it. It is the purpose of this article to catalog the factors employers should consider in approaching an imminent strike and devising contingency plans. It attempts to focus on the types of problems, legal and practical, that frequently arise in strike situations, and suggests certain measures that employers may adopt in preparing for, and defending against, the economic impact of a strike.  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