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   1185篇
  免费   36篇
各国政治   82篇
工人农民   131篇
世界政治   91篇
外交国际关系   42篇
法律   560篇
中国政治   55篇
政治理论   252篇
综合类   8篇
  2023年   8篇
  2022年   6篇
  2021年   11篇
  2020年   27篇
  2019年   27篇
  2018年   40篇
  2017年   39篇
  2016年   45篇
  2015年   19篇
  2014年   33篇
  2013年   179篇
  2012年   27篇
  2011年   26篇
  2010年   25篇
  2009年   29篇
  2008年   35篇
  2007年   34篇
  2006年   35篇
  2005年   32篇
  2004年   32篇
  2003年   27篇
  2002年   23篇
  2001年   15篇
  2000年   32篇
  1999年   22篇
  1998年   17篇
  1997年   17篇
  1996年   23篇
  1995年   23篇
  1994年   26篇
  1993年   20篇
  1992年   18篇
  1991年   16篇
  1990年   22篇
  1989年   16篇
  1988年   16篇
  1987年   14篇
  1986年   17篇
  1985年   17篇
  1984年   15篇
  1983年   14篇
  1982年   25篇
  1981年   11篇
  1980年   9篇
  1978年   6篇
  1977年   7篇
  1976年   11篇
  1975年   5篇
  1973年   4篇
  1968年   4篇
排序方式: 共有1221条查询结果,搜索用时 31 毫秒
201.
As the challenges of maintaining (or, in the US case, attaining) affordable universal coverage multiply, the debate about what constitutes "real" reform intensifies in Western health care systems. The reality of reform, however, lies in the eyes of myriad beholders who variously enshrine consumer responsibility, changes in payment systems, reorganization, and other strategies -- or some encompassing combination of all of the above -- as the essential ingredient(s). This debate, increasingly informed by the agendas of health services researchers and health policy analysts, arguably serves as much or more to becloud as to clarify the practical options policy makers face and remains severely imbalanced with respect to the institutional sectors on which it concentrates, the fields of knowledge on which it draws, and the roles it envisions for markets and the state.  相似文献   
202.
正Dear Readers,Forum is a column that provides a space for varying perspectives on contemporary Chinese society.We invite you to submit personal viewpoints on past and current topics(in either English or Chinese).yanwei@bjreview.com Please provide your name and address along with your comments Deng Xiaoping’s role as the father of reform in modern China is historically secure.In his vast biography of the Chinese leader published in 2011,American academic  相似文献   
203.
204.
Forensic fractographic features of bone reliably establish crack propagation in perimortem injuries. We investigated if similar fracture surface features characterize postmortem fractures. Experimentally induced peri- and postmortem fractures were used to assess if fractographic features vary as bone elasticity decreases during the postmortem interval (PMI). Thirty-seven unembalmed, defleshed human femoral shafts from males and females aged 33–81 years were fractured at varying PMIs with a drop test frame using a three-point bending setup and recorded with a high-speed camera. Vital statistics, cause of death, PMI length, temperature, humidity, collagen percentage, water loss, fracture energy, and fractography scores were recorded for each sample. Results showed that fractographic features associated with perimortem fractures were expressed in PMIs up to 40,600 accumulated degree hours (ADH), or 60 warm weather days. Hackle was the most consistently expressed feature, occurring in all fractures regardless of ADH. The most variable characteristics were wake features (78.4%) and arrest ridges (70.3%). Collagen percentage did not correlate strongly with ADH (r = −0.04, p = 0.81); however, there was a strong significant correlation between ADH and water loss (r = 0.74, p < 0.001). Multinomial logistic regression showed no association between fractographic feature expression and ADH or collagen percentage. In conclusion, forensic fractographic features reliably determine initiation and directionality of crack propagation in experimentally induced PMIs up to 40,600 ADH, demonstrating the utility of this method into the recent postmortem interval. This expression of reliable fractographic features throughout the early PMI intimates these characteristics may not be useful standalone features for discerning peri- versus postmortem fractures.  相似文献   
205.
206.
207.
This short introduction reflects upon the relatively improved representation of women in sports history and its historiography. It highlights the similar challenges faced by those researching women in sport and those researching women's history more generally. In addition to identifying the need for more empirical research around female participation in ‘sport’, it notes the importance of moving beyond this conceptual territory to physical culture. Only then can an adequate understanding of the kinesthetic experiences of girls and women in particular times, places and spaces be achieved.  相似文献   
208.
209.
The need to grasp the complexity of contemporary China is more urgent than ever The year 2021 is a big year for the People's Republic of China. Midyear will see the 100 th anniversary of the founding of the Communist Party of China. It will also mark one of the nation's centennial goals, referred to over the last few years, when the country achieves a moderately prosperous status. A lot of planning has already gone into how things will happen in July. At least, within China, there will be a lot going on.  相似文献   
210.
A PEOPLE'S PARTY     
As an organization, there can be few in modern history that have had so much impact on the world as the Communist Party of China (CPC). Since 1949, it has been the ruling party in a country whose population comprises a fifth of humanity. That alone means it merits attention and study. But in addition to this, over that time, it has also seen the People's Republic of China (PRC) grow from a country with huge developmental and economic challenges to the world's second largest economy, and one of its great modern powers. In this way, the CPC has become increasingly important for the outside world to understand as the impact of the country's economic growth increases.  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