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   63686篇
  免费   3487篇
  国内免费   66篇
耳鼻咽喉   934篇
儿科学   1926篇
妇产科学   1511篇
基础医学   9449篇
口腔科学   2280篇
临床医学   5965篇
内科学   11660篇
皮肤病学   1549篇
神经病学   6756篇
特种医学   2924篇
外科学   8734篇
综合类   225篇
一般理论   33篇
预防医学   4213篇
眼科学   1222篇
药学   4285篇
中国医学   97篇
肿瘤学   3476篇
  2023年   350篇
  2022年   316篇
  2021年   655篇
  2020年   676篇
  2019年   748篇
  2018年   1399篇
  2017年   1190篇
  2016年   1538篇
  2015年   1280篇
  2014年   1526篇
  2013年   2698篇
  2012年   3447篇
  2011年   3859篇
  2010年   2020篇
  2009年   1380篇
  2008年   3773篇
  2007年   3920篇
  2006年   3705篇
  2005年   3629篇
  2004年   3524篇
  2003年   3487篇
  2002年   3368篇
  2001年   2642篇
  2000年   3308篇
  1999年   1827篇
  1998年   627篇
  1997年   532篇
  1996年   392篇
  1995年   334篇
  1994年   349篇
  1993年   328篇
  1992年   358篇
  1991年   291篇
  1990年   281篇
  1989年   358篇
  1988年   278篇
  1987年   277篇
  1986年   267篇
  1985年   319篇
  1984年   349篇
  1983年   302篇
  1982年   273篇
  1981年   240篇
  1980年   216篇
  1979年   278篇
  1978年   192篇
  1977年   210篇
  1976年   200篇
  1975年   179篇
  1973年   181篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
43.
Within the scope of the symposium “Rescue Medicine in Germany” (held at the Reisensburg near Ulm in 2002), the need for a standardized data acquisition set for prehospital cardiac arrest patients was identified. Therefore, the working group “Emergency Medicine” of the German Society of Anesthesiology and Intensive Care Medicine (DGAI) created a nationwide data acquisition system for primary medical care in prehospital cardiac arrest patients treated with cardiopulmonary resuscitation procedures. The system is in full accordance with the “Utstein style.” Integration of this data acquisition system, for example into the “Dortmund protocol,” is providing a standardized data web base of all acquired prehospital data analyze and to compare processing and structural quality. As additional modules for this nationwide data web base system, an inhospital module “further clinical treatment” and a “long-term follow-up” module are currently in the developmental process.  相似文献   
44.
Learning and exams are closely interconnected. Test elements should accompany the learning process and not only serve to complete the training period. Examinations should be oriented toward the ideas learned and the forms of instruction used. However, the significance of examinations during the training period for emergency medical technicians is hardly ever addressed in the literature. All of the procedures that serve to evaluate the students’ performance are subsumed under the term “assessments.” This contribution presents the tasks of assessments and their requirements for occupational training of certified emergency medical technicians. It also offers a suggestion to develop a modern testing concept.  相似文献   
45.
46.
47.
48.
Summary The objective of this study was to investigate if the dust in a mill producing soft paper tissue caused respiratory symptoms or impaired respiratory function. Using a questionnaire and spirometry, 355 persons were examined. They were divided into three groups according to present exposure to dust; low (< 1 mg/m3), moderate (1–5 mg/m3) and heavy (> 5 mg/m3). There was a dose-dependent increase of symptoms from the upper respiratory tract. However, coughing and coughing with phlegm were not found to be more common among persons with heavy exposure compared to those with low exposure to the dust. There was no difference in FEV, or FVC during a work shift. Persons with long-term (> 10 years) and heavy exposure to dust seemed to have impaired respiratory function compared to those with low and/or short-term exposure to the dust.  相似文献   
49.
50.
The KID-syndrome in Finland. A report of four cases   总被引:2,自引:0,他引:2  
We describe a rare syndrome in a Finnish family, in which the father and his two sons are congenitally deaf and also exhibit corneal vascularization, and hyperkeratosis of the skin of the palms, soles, elbows and knees. In addition, all 3 suffer from fungal infections of the skin and nails. We also describe a fourth, sporadic case of a 9-year-old girl with the same disease. The KID (k = keratitis, i = ichthyosis, d = deafness) syndrome is an ectodermal dysplasia that probably arises through mutation, and is transmitted as an autosomal dominant in the family described by us.  相似文献   
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