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   11626篇
  免费   1244篇
各国政治   409篇
工人农民   376篇
世界政治   840篇
外交国际关系   284篇
法律   9000篇
中国共产党   1篇
中国政治   82篇
政治理论   1805篇
综合类   73篇
  2020年   338篇
  2019年   339篇
  2018年   385篇
  2017年   446篇
  2016年   460篇
  2015年   427篇
  2014年   418篇
  2013年   1166篇
  2012年   268篇
  2011年   359篇
  2010年   531篇
  2009年   484篇
  2008年   275篇
  2007年   248篇
  2006年   355篇
  2005年   239篇
  2004年   228篇
  2003年   225篇
  2002年   204篇
  2001年   439篇
  2000年   346篇
  1999年   297篇
  1998年   143篇
  1997年   129篇
  1996年   103篇
  1995年   131篇
  1994年   141篇
  1993年   115篇
  1992年   216篇
  1991年   235篇
  1990年   217篇
  1989年   230篇
  1988年   208篇
  1987年   178篇
  1986年   207篇
  1985年   226篇
  1984年   220篇
  1983年   185篇
  1982年   147篇
  1981年   131篇
  1980年   129篇
  1979年   151篇
  1978年   92篇
  1977年   79篇
  1976年   67篇
  1975年   71篇
  1974年   77篇
  1973年   64篇
  1972年   55篇
  1971年   56篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
701.
702.
4 fatal cases after tracheotomy and 35 cases after endotracheal anaesthesia were examined taking pathomorphological aspects into consideration. In long-period intubation mucous membrane necroses occurred as of the 4th day. After 6 days' intubation skeletizations of the tracheal rings were established in each case. Infections of the decubial ulcers and errosion haemorrhages from the necrotically altered tracheal wall were frequent complications. Faulty intubation of the oesophagus and the right bronchus, aspirations and reflex-related circulatory failure during intubation as well as hypoxic damage as a result of the windpipe opening being impaired are discussed from the morphological point of view.  相似文献   
703.
704.
To answer the question whether a negative result of gas chromatographic blood analysis for components of chemical mace proves that no or at most only slight tear gas exposure can have occurred, animal experiments were carried out. In the blood of 10 guinea pigs, which were exposed to the contents of chemical mace for 1--6 h, the solvants 1,1,2-trichloro-1,2,2-trifluorethane (freon 113) and 1,1,1-trichloroethane could easily be detected--even 23 h after the end of exposure or after a storage of the blood samples for 18 weeks--whereas the lacrimator chloracetophenone (CN) could not be found at all. In vitro experiments showed that CN relatively quickly reacts with components of blood. Therefore, blood samples should be analyzed for CN after withdrawal as soon as possible. In case of inhalation of the contents of chemical mace, i.e., after the comparatively mildest form of CN application, most probably no traces of the lacrimator at all can pass into the blood due to the quick reaction of CN with proteins of the respiratory surface of the lung.  相似文献   
705.
This article argues that the concept of illness has certain properties that make it a convenient administrative device for managing a need-based redistributive system in a society whose primary distributive system is based on work. These properties--cultural acceptance of illness as a legitimate excuse for not working, objective standards for identifying illness, and restrictiveness--have led to the widespread use of illness as an eligibility criterion for many social benefits, including cash transfers, services, privileges and exemptions. Paradoxically, the traditional rationales for using illness as one of the keystones of categorical welfare policy are eroding, yet welfare programs based on illness certification are growing rapidly. To explain this anomaly, the author suggests that medical certification as a distributive mechanisms serves certain latent political functions, such as allowing welfare programs to be responsive to political unrest, siphoning off opposition to controversial policies by the granting of medical exemptions to intense opponents, are reducing political conflict by using physicians as arbiters.  相似文献   
706.
707.
708.
Reviews the need for and development of expanded school mental health (ESMH) programs, which provide a continuum of mental health promotion and intervention through school–community partnerships. Since ESMH is a relatively new, but increasingly prominent field, countless issues are being addressed in practice and research and in efforts to bridge practice and research. We review particular content and context dimensions of ESMH in need of development including quality assessment and improvement, empirically supported practice, improving assessment and outcome evaluation, involving educators in the work, understanding school environments, and tailoring programs through qualitative research. Summaries of articles that amplify these themes are provided.  相似文献   
709.
710.
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