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   7488篇
  免费   485篇
各国政治   357篇
工人农民   298篇
世界政治   489篇
外交国际关系   240篇
法律   5175篇
中国政治   38篇
政治理论   1339篇
综合类   37篇
  2020年   163篇
  2019年   169篇
  2018年   186篇
  2017年   217篇
  2016年   223篇
  2015年   199篇
  2014年   192篇
  2013年   784篇
  2012年   160篇
  2011年   175篇
  2010年   214篇
  2009年   227篇
  2008年   172篇
  2007年   173篇
  2006年   183篇
  2005年   175篇
  2004年   194篇
  2003年   165篇
  2002年   144篇
  2001年   316篇
  2000年   263篇
  1999年   234篇
  1998年   103篇
  1997年   74篇
  1996年   81篇
  1995年   87篇
  1994年   98篇
  1993年   96篇
  1992年   160篇
  1991年   160篇
  1990年   154篇
  1989年   162篇
  1988年   130篇
  1987年   142篇
  1986年   130篇
  1985年   136篇
  1984年   105篇
  1983年   120篇
  1982年   91篇
  1981年   83篇
  1980年   60篇
  1979年   109篇
  1978年   71篇
  1977年   59篇
  1976年   51篇
  1975年   47篇
  1974年   56篇
  1973年   57篇
  1972年   44篇
  1968年   40篇
排序方式: 共有7973条查询结果,搜索用时 15 毫秒
121.
122.
Nuland SB 《Time》1996,148(14):8-13
  相似文献   
123.
In 1974, hospitals in Rhode Island have participated in annual negotiations with state officials and representatives from Blue Cross to determine the allowed increase in statewide hospital costs (the "Maxicap") for the next fiscal year, based on projected increases in hospitals' revenues, changes in patient volume and operating expenses. Individual hospital budgets may be above or below the Maxicap as long as the total increase in hospital costs for all hospitals in the state does not exceed the negotiated amount. At a time when regulatory solutions are increasingly under fire, continued support for Rhode Island's approach to hospital cost containment from third party payers, providers and public officials stands in stark contrast to other states where rate setting was either dismantled or discredited as a cost control strategy. A negotiated global cap on hospital expenditures offers an alternative to formula-based state rate-setting methodologies which could be incorporated as part of an all-payer reimbursement methodology or as an incremental step towards more comprehensive reform.  相似文献   
124.
125.
In malignant hyperthermia, myophosphorylase reaction shows characteristic changes that take place within minutes: (1) a generally strongly weakened reaction; (2) numerous negatively reacting fibres; (3) frequently, fibre sections that show spotty and/or striatal weak or negative reactions and fibre sections with strong striatal reactions with relatively narrow sarcomere spacings (a "sign of hypercontraction"). Obviously, the morphological findings that show characteristic "striated fibres" are typical of the malignant hyperthermia syndrome! It is important to note that the muscular fibres showing such changes are, as a rule, inconspicuous when using other stains and reactions. These pathological myophosphorylase reactions were observed in five deceased patients (one independently of anaesthesia after an extended walk) and in 19 pigs (18 times after halothane testing and once in an experimental animal with clinical evidence of the presence of malignant hyperthermia). These reactions were not noted in pigs with negative halothane reactivity or prior to halothane testing. They were also not seen in a large number of very different healthy and diseased control and reference cases from our biopsy and autopsy material. Myophosphorylase reaction enables convincing demonstration of malignant hyperthermia, past or present. Hence, it is possible to elucidate puzzling deaths or verify apparently clear death occurring during or subsequent to anaesthesia or simply following stress ("human stress syndrome"). Many of these deaths doubtlessly escape the attention of clinicians using the usual morphological examination methods. However, the reaction cannot be used to identify potential victims.  相似文献   
126.
127.
128.
129.
130.
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