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   1100613篇
  免费   122726篇
  国内免费   652篇
  1223991篇
  2016年   13185篇
  2015年   20158篇
  2014年   22699篇
  2013年   30638篇
  2012年   32867篇
  2011年   31286篇
  2010年   21344篇
  2009年   20060篇
  2008年   26766篇
  2007年   28177篇
  2006年   26504篇
  2005年   30817篇
  2004年   29603篇
  2003年   27245篇
  2002年   24695篇
  2001年   44519篇
  2000年   44899篇
  1999年   36722篇
  1998年   13229篇
  1997年   13599篇
  1996年   12878篇
  1995年   12440篇
  1994年   12392篇
  1993年   12220篇
  1992年   31814篇
  1991年   31173篇
  1990年   30707篇
  1989年   29748篇
  1988年   28059篇
  1987年   26788篇
  1986年   25158篇
  1985年   25484篇
  1984年   21193篇
  1983年   18566篇
  1982年   14432篇
  1981年   13308篇
  1980年   12481篇
  1979年   21133篇
  1978年   16512篇
  1977年   15224篇
  1976年   14375篇
  1975年   16119篇
  1974年   17328篇
  1973年   17299篇
  1972年   16008篇
  1971年   14538篇
  1970年   12648篇
  1969年   12259篇
  1968年   11112篇
  1967年   9747篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Over the past 10 years the AIDS crisis has produced a large volume of writing. Much of this is documentary. Dozens of studies of AIDS from various clinical and political perspectives have been complemented by just as many published diaries, autobiographies, novels, plays, and poems. A few of these works have risen to the surface not only as extraordinarily valuable testimonies to the changes AIDS has wrought in individual and collective life but also as first-rate literary works, worth reading because beyond their immediate purposes they articulate with extraordinary lucidity and compassion some deep truths about the human--and the modern--condition. Paul Monette's Borrowed Time is among the most distinctive of those. It speaks not only for the community of people with AIDS and those who support them but for a generation.  相似文献   
92.
Argon laser surgery is an effective treatment for ectasias and congenital port-wine stains; however, its use in children under the age of 13 is controversial. This paper reviews 202 children under the age of 13 who underwent argon laser treatments for congenital port-wine stains, spider angiomas, epidermal nevi, and lentigines. The clinical characteristics of port-wine stains in 170 children are discussed. Good to excellent results (moderate to complete clearing) in port-wine stains were obtained in 60 percent of patients and seemed to correlate best with lack of blanchability on pressure. Hypertrophic scarring was seen in only 7 children, all of whom had undressed wounds; no significant scarring has been seen in any subsequent child who had maintained a dressed wound postoperatively.  相似文献   
93.
94.
Trigger finger is a relatively common clinical entity, most frequently caused by stenosing tenosynovitis. Several other conditions not related to tenosynovitis also have been described as a cause of triggering, and these have been reviewed. We present a rare anomaly of the fourth lumbrical muscle insertion as a cause of triggering of the right little finger. This was completely relieved following excision of the anomalous muscle. This rare anatomic variant should be added to the list of potential causes of trigger finger.  相似文献   
95.
96.
97.
98.
99.
100.
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