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   885篇
  免费   2篇
电工技术   2篇
化学工业   3篇
机械仪表   2篇
轻工业   4篇
石油天然气   1篇
无线电   1篇
一般工业技术   7篇
冶金工业   865篇
自动化技术   2篇
  2022年   1篇
  2021年   2篇
  2016年   1篇
  2015年   1篇
  2014年   2篇
  2013年   5篇
  2011年   1篇
  2010年   1篇
  2009年   1篇
  2008年   1篇
  1999年   10篇
  1998年   175篇
  1997年   121篇
  1996年   94篇
  1995年   54篇
  1994年   58篇
  1993年   49篇
  1992年   13篇
  1991年   4篇
  1990年   8篇
  1989年   1篇
  1988年   2篇
  1987年   3篇
  1986年   1篇
  1985年   1篇
  1983年   3篇
  1982年   6篇
  1981年   16篇
  1980年   19篇
  1978年   4篇
  1977年   97篇
  1976年   127篇
  1975年   3篇
  1954年   1篇
  1899年   1篇
排序方式: 共有887条查询结果,搜索用时 78 毫秒
51.
52.
The combined anterolateral osteoplastic fixation of the spine was carried out on 17 cases out of 73 operated upon for pathological spinal changes of various etiology. The tibial crest rigid homograft and the rib autograft on vasoneuromuscular feeding pedicle were used. Such a combination of bone grafts possessing different mechanic and osteogenic properties permitted to obtain a reliable fixation of the spine for all the period necessary for anatomic and functional reconstruction of the grafts.  相似文献   
53.
Flexner's dysentery is often accompanied with intestinal dysbacteriosis. Disbiotic changes in the intestine contribute to specific shigella endotoxins entering blood flow thus prolonging clinical symptoms of the underlying disease. Administration of bacterial biological preparations (bifidumbacterin forte, lactobacterin) relieves specific endotoxemia, reduces the duration of the disease and has an immunomodulating action.  相似文献   
54.
Reaching the goals moving with different speed (from 1 to 400 mm/sec), the chimpanzee revealed respective behavioural, emotional, instrumental, and cardiovascular responses. When obscuring the goal for a certain time, the chimpanzee nevertheless managed to reach it, the relations between the speed of approaching goal and behavioural or instrumental responses being preserved. Thereupon, the chimpanzee are able to reach the goal provided the latter's trace exceeds 5-10-fold the time of really acting stimulus.  相似文献   
55.
The authors elaborated measures aimed to lower mortality and higher life expectancy among workers of able-bodied age. The recommendations involve changes in technology of drift mining, improved electric safety of technologic equipment, annual analysis of mortality parameters among miners, accomplishment of prophylactic recommendations on treatment of functional cardiovascular disorders, provision of workers with pectin as a therapeutic and prophylactic nutrient.  相似文献   
56.
57.
In the article the final analysis of organization of surgical care during the local military conflict in northern Caucasus was presented. The real possibilities of different medical units such as single medical company and medical squadron of special assignment was described. Also concrete contents of emergency specialized surgical care and its role in improvement of outcomes in patients with combined combat injuries was reflected. Mortality in this patients was decreased from 25.2 to 12.8%. The defects of surgical care were analyzed and the main ways of improvement of surgical care in local military conflict were presented. In the result of using the principle of moving the medical care closer to the wounded in the whole system of consecutive care the mortality was decreased up to 1.3%.  相似文献   
58.
59.
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