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   23433篇
  免费   1221篇
  国内免费   118篇
耳鼻咽喉   308篇
儿科学   638篇
妇产科学   667篇
基础医学   3672篇
口腔科学   324篇
临床医学   2217篇
内科学   4458篇
皮肤病学   598篇
神经病学   2300篇
特种医学   1260篇
外国民族医学   8篇
外科学   3255篇
综合类   178篇
一般理论   11篇
预防医学   1530篇
眼科学   554篇
药学   1590篇
中国医学   58篇
肿瘤学   1146篇
  2022年   171篇
  2021年   339篇
  2020年   244篇
  2019年   333篇
  2018年   391篇
  2017年   325篇
  2016年   431篇
  2015年   438篇
  2014年   534篇
  2013年   651篇
  2012年   1065篇
  2011年   1107篇
  2010年   603篇
  2009年   572篇
  2008年   899篇
  2007年   1004篇
  2006年   993篇
  2005年   975篇
  2004年   895篇
  2003年   837篇
  2002年   820篇
  2001年   794篇
  2000年   716篇
  1999年   663篇
  1998年   286篇
  1997年   242篇
  1996年   215篇
  1995年   201篇
  1994年   178篇
  1993年   177篇
  1992年   400篇
  1991年   378篇
  1990年   415篇
  1989年   381篇
  1988年   348篇
  1987年   388篇
  1986年   352篇
  1985年   344篇
  1984年   259篇
  1983年   210篇
  1979年   251篇
  1978年   201篇
  1977年   180篇
  1975年   164篇
  1974年   185篇
  1973年   181篇
  1972年   211篇
  1971年   188篇
  1969年   169篇
  1967年   169篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Nawroth F  Foth D  Stute P  Schmidt T  Römer T 《Maturitas》2000,37(2):129-132
Our report concerns a patient with a climacterium praecox and an X-chromosomal anomaly (86% 46, XX; 7% 47, XXX; 7% 45, X0) desiring to give birth. She conceived once after down-regulation of the gonadotrophins by means of a cyclical hormone replacement therapy followed by gonadotrophin stimulation, as well as a second time under down-regulation with a GnRH-analogue and gonadotrophin stimulation. On the basis of the case report and of the literature, a possible interval therapy in such a patient, especially one even with increasing ovarian insufficiency, will be portrayed and discussed.  相似文献   
102.
Summary Rabbits immunized with measles- and mumps viruses grown in monkey kidney cells and chick embryo fibroblasts and with their water- and organic solvent fractions obtained by Tween-ether treatment developed immediate type skin hyperreactivity (Arthus phenomenon-like) to challenge with the complete viruses and calf serum, but not to challenge with tissue antigens prepared in the absence of calf serum. The skin reaction in animals immunized with ether fractions was stronger than in animals immunized with water fractions or complete virus, respectively. The intensity of individual skin reactions in each animal was better correlated to the presence of precipitating antibody against calf serum or a component thereof than to the HI titer against the viruses used for immunization.The seriological tests for measles and mumps were supported by the Bundesminister für Jugend, Familie und Gesundheit, Bonn, BRD.  相似文献   
103.
104.
105.
106.
107.
108.
The distribution of LDH-isoenzymes from homogenate-supernatant of M. soleus of normal and streptozotocin-diabetic male rats was investigated by agargel-electrophoresis. Five LDH-isoenzymes could be detected in the M. soleus of normal rats; the average proportion of H-subunits was 69.1% (age 3-4 month) resp. 69.6% (age 13 month) from the total value. In male rats of the same age a mild diabetes was induced by intravenous injection of 65 mg streptozotocin per kg body weight. In the M. soleus of these animals also 5 LDH-isoenzymes were detected. After 1-2 month duration of diabetes the LDH1 is decreased from 30.3% of controls to 18.2% and the LDH4 is increased from 11.1% of controls to 20.1%. The H-subunit value decreased to 61.9% from the total value. In long term diabetes (11 month) the values of single fractions and the H-subunit value did not differ from those of controls. The findings are discussed considering the composition of M. soleus on different fiber types and the influence of diabetic conditions.  相似文献   
109.
Brief observations of mother-stimulated infant vocalizationwere perform ed during pediatric clinic visits on 4- to 6-month-oldinfants to determine whether mothers with positive attitudestoward the pregnancy and/or the in fant would have infants whovocalized more during clinic visits. Mothers with more positiveattitudes toward the pregnancy, assessed prenatally, had infantswho showed significantly more vocalization during clinic visitsat 5 months, 6 months, and the combination of 5 and 6 months.Mothers with more positive attitudes toward the infant had infantswho showed signcantly more vocalization at 4 months and thecombination of observations at 4 months and 6 months. Resultssuggest that brief observations of vocalization during clinicvisits may be useful as a rough index of the quality of themother-child interaction.  相似文献   
110.
A review of 1547 official hospital record summaries concerning discharges during the period 1980 through 1983 of patients whose diagnoses had been coded as acute rheumatic fever revealed that in only 61% of the cases had this illness been diagnosed or suspected. A substantial proportion of the remaining patients had had acute non-rheumatic pericarditis diagnosed. The medical records were analyzed for 141 patients diagnosed in 1980 or 1983 by hospital departments as having acute rheumatic fever with regard to the revised Jones criteria. They were fulfilled in 47 patients, 23 of whom were considered unlikely cases of rheumatic fever. Eight patients were considered possible cases, although they did not fulfill the revised Jones criteria. The current annual incidence of acute rheumatic fever was estimated to be at most 0.3 per 100,000 inhabitants.  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