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   1278964篇
  免费   95577篇
  国内免费   1667篇
耳鼻咽喉   16514篇
儿科学   41347篇
妇产科学   35279篇
基础医学   191210篇
口腔科学   35478篇
临床医学   118943篇
内科学   251585篇
皮肤病学   27583篇
神经病学   103154篇
特种医学   47136篇
外国民族医学   265篇
外科学   180957篇
综合类   25816篇
现状与发展   3篇
一般理论   574篇
预防医学   105697篇
眼科学   28318篇
药学   93440篇
  7篇
中国医学   2088篇
肿瘤学   70814篇
  2019年   10454篇
  2018年   14051篇
  2017年   10761篇
  2016年   11703篇
  2015年   13489篇
  2014年   18626篇
  2013年   28272篇
  2012年   38816篇
  2011年   41220篇
  2010年   23760篇
  2009年   22895篇
  2008年   38782篇
  2007年   41378篇
  2006年   40878篇
  2005年   39951篇
  2004年   38298篇
  2003年   36565篇
  2002年   35469篇
  2001年   56172篇
  2000年   57221篇
  1999年   48250篇
  1998年   13517篇
  1997年   12296篇
  1996年   12719篇
  1995年   11984篇
  1994年   11164篇
  1993年   10450篇
  1992年   38265篇
  1991年   37732篇
  1990年   36505篇
  1989年   35309篇
  1988年   32725篇
  1987年   32056篇
  1986年   30576篇
  1985年   28826篇
  1984年   21965篇
  1983年   19208篇
  1982年   11378篇
  1979年   20965篇
  1978年   15409篇
  1977年   12802篇
  1976年   11857篇
  1975年   12825篇
  1974年   15609篇
  1973年   15364篇
  1972年   14518篇
  1971年   13560篇
  1970年   12794篇
  1969年   12078篇
  1968年   11232篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified.  相似文献   
53.
Cell physiology and molecular biology typically follow a reductionistic approach in science. In the last decade, molecular principles and pathogenetic factors involved in the development of many diseases have been successfully discovered. Therefore, early biological concepts based on systemic and cybernetic thoughts have been largely overshadowed by these more recent molecular and pathogenetic factors. This review highlights discoveries on bone development and hypothalamic controlled feeding and eating behavior with a cybernetic and systemic perspective. Interestingly, ancient ideas on bone development and hypothalamic function are still reasonable considerations to embed new molecular discoveries into a systemic concept of principles organizing nature.  相似文献   
54.
55.
56.
57.
The absence of the temporary incisors could be to a genetic illness or to some multiple premature extractions. These extractions are the aftermaths of the carious lesions or some traumatisms underwent by the temporary incisors. Beyond measure the loss of the space, the premature loss some temporary incisors very often assign the relational development of the child and disturb its psychological development and the aesthetic function. Across some cases clinics, the authors show that the replacement of the temporary incisors is the therapeutic ideal solution. Indeed, the child prosthesis, replacing the temporary absent incisors, solves the psychological, aesthetic and relational problems of the child.  相似文献   
58.
Contour defects resulting in deformity caused by lack of tissue can be improved by conventional surgery using autologous tissue, but there is always a donor site morbidity. Integra has been available since the early 1980's for use in acute burns and more recently in reconstruction. It has been shown histologically to act as a tissue regeneration template. The regenerated dermis is buried under an autologous thin split-skin graft. In this study, the principle of burying Integra (without the silicone layer) has been applied to deep tissue defects in 12 reconstructive cases. Such regenerated tissues survive at least 3 years after burying. Modification to the technique to avoid visible edges are being developed.  相似文献   
59.
Summary The third-stage larvae of Daniconema anguillae Moravec et K?ie, 1987 are found in the eels fins caught from Dringis Lake (Lithuanian National park). The morphology of these larvae is briefly described.  相似文献   
60.
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