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   26931篇
  免费   1368篇
  国内免费   83篇
耳鼻咽喉   361篇
儿科学   1485篇
妇产科学   609篇
基础医学   2903篇
口腔科学   581篇
临床医学   1613篇
内科学   5778篇
皮肤病学   779篇
神经病学   1692篇
特种医学   844篇
外科学   3529篇
综合类   795篇
一般理论   15篇
预防医学   1282篇
眼科学   1724篇
药学   2360篇
中国医学   181篇
肿瘤学   1851篇
  2023年   193篇
  2022年   505篇
  2021年   988篇
  2020年   509篇
  2019年   650篇
  2018年   820篇
  2017年   557篇
  2016年   679篇
  2015年   672篇
  2014年   1055篇
  2013年   1264篇
  2012年   1785篇
  2011年   1905篇
  2010年   1011篇
  2009年   846篇
  2008年   1328篇
  2007年   1371篇
  2006年   1325篇
  2005年   1158篇
  2004年   1039篇
  2003年   881篇
  2002年   798篇
  2001年   706篇
  2000年   702篇
  1999年   564篇
  1998年   234篇
  1997年   174篇
  1996年   144篇
  1995年   150篇
  1994年   115篇
  1993年   99篇
  1992年   368篇
  1991年   371篇
  1990年   338篇
  1989年   328篇
  1988年   285篇
  1987年   251篇
  1986年   234篇
  1985年   232篇
  1984年   171篇
  1983年   135篇
  1981年   93篇
  1979年   157篇
  1978年   97篇
  1977年   81篇
  1975年   83篇
  1974年   100篇
  1973年   93篇
  1972年   118篇
  1970年   78篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Primary amyloidosis of larynx is an uncommon phenomenon, the precise etiopathogenesis of which is not yet clear. It can present with slowly increasing hoarseness or difficulty in breathing. It presents more commonly as infiltrative lesion, exophytic presentation is a rare occurrence.  相似文献   
82.
The Liverpool Continuing Health in the Community Study has followed up 1070 elderly community subjects over 6 years. In the first year 123 subjects had case-level depression. Three years later 49 (39.8%) of the previously depressed were recovered, 33 (26.8%) were depressed, 16 (13%) were not available for interview and 25 (20.3%) were dead. This study looks at factors associated with the 3-year outcome of patients who were depressed at year 0. Two outcome groups that were compared were a recovered depression group and a recurrent/persistent depression group. The factors that were significantly associated with a recurrence of depression (or persistent depression) at year 3 were bereavement of a close figure in the 6 months before interview, loneliness and life dissatisfaction at year 3. A variety of traditional risk factors for depression (including age, marital status, physical ill-health and incapacity) failed to attain significance in predicting recurrent or persistent depression. When combined, both recovered and recurrently depressed groups at year 3 had significantly higher levels of pain and a higher number of serious upsets in the past 6 months and 6 weeks compared to a compared to a control group. The depressed at year 0 were more likely to have entered more dependent forms of accommodation by year 3.  相似文献   
83.
Osteoclastoma of the calvarial bone of membranous origin is a rare entity. This paper presents a case of osteoclastoma of the occipital bone and a brief review of literature.  相似文献   
84.
Ossifying fibroma of the sellar turcica is extremely rare. There are only sporadic case reports in the literature. One such case simulating pituitary adenoma is presented in an 18-year-old girl.  相似文献   
85.
S Garg  S N Sharma 《Die Pharmazie》1992,47(12):924-926
Aerosol formulations to act as medicated aerosol dressings have been prepared with an aim of forming a protective film over the wound after spraying combining the properties of antiseptics and hemostatics. Chlorhexidine acetate along with three hemostatics namely zinc acetate, methyl cellulose and Calendula tincture were used for the formulations. The formulations were found to be satisfactory in their performance and purpose.  相似文献   
86.
A female child with post-traumatic en coup de sabre type of morphoea (fronto-parietal circumscribed scleroderma) involving the left side of the forehead and face, who developed a Coat's disease-like fundus picture over the following two years, is being reported.  相似文献   
87.
88.
89.
90.
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