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   37190篇
  免费   3122篇
  国内免费   1379篇
耳鼻咽喉   490篇
儿科学   622篇
妇产科学   574篇
基础医学   5364篇
口腔科学   1031篇
临床医学   3411篇
内科学   6558篇
皮肤病学   631篇
神经病学   2992篇
特种医学   1383篇
外国民族医学   2篇
外科学   4766篇
综合类   3554篇
一般理论   8篇
预防医学   2328篇
眼科学   790篇
药学   3553篇
  11篇
中国医学   746篇
肿瘤学   2877篇
  2023年   223篇
  2022年   474篇
  2021年   695篇
  2020年   511篇
  2019年   554篇
  2018年   862篇
  2017年   726篇
  2016年   702篇
  2015年   881篇
  2014年   1106篇
  2013年   1333篇
  2012年   1875篇
  2011年   1890篇
  2010年   1193篇
  2009年   979篇
  2008年   1566篇
  2007年   1697篇
  2006年   1482篇
  2005年   1242篇
  2004年   1086篇
  2003年   1010篇
  2002年   858篇
  2001年   2426篇
  2000年   2319篇
  1999年   1949篇
  1998年   756篇
  1997年   545篇
  1996年   392篇
  1995年   331篇
  1994年   284篇
  1993年   253篇
  1992年   1045篇
  1991年   921篇
  1990年   831篇
  1989年   914篇
  1988年   822篇
  1987年   759篇
  1986年   702篇
  1985年   615篇
  1984年   386篇
  1983年   321篇
  1982年   183篇
  1981年   139篇
  1980年   119篇
  1979年   205篇
  1973年   95篇
  1972年   93篇
  1971年   94篇
  1970年   83篇
  1968年   84篇
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
31.
Y Q Li  W Yuan  S L Zhang 《中国中西医结合杂志》1992,12(12):719-21, 737, 708
Xiao Er Ke Chuan Ling Oral Liquid (KCL) is a Chinese herbal preparation consisted of 10 herbs such as Prunus armeniacae, Scutelaria baicalensis, Lonicera japonica etc. 30 children suffering from bronchopneumonia and/or acute bronchitis were treated with KCL (treated group) and another 30 cases were treated with penicillin and aminophylline (control group). Results: cure rate and effective rate in treated group was 26.6%, and 93.3% respectively. While in control group was 30% and 96.6% respectively. No significant differences were seen between them(P > 0.05). The pharmacodynamic experiment showed KCL had potent pharmacological action. The experiment on tracheal fragment of Guinea pig in vitro showed it caused moderately strong smooth muscle relaxation, through inhibition the effect of histamine and acetylcholine. Asthma induction experiment of Guinea pig in vivo showed KCL could significantly prolong the latent period of asthma and alleviate asthmatic symptom. Ammonium water cough induction experiment in mice showed it may apparently prolong cough latent period and reduce times of cough relapse and alleviate cough symptom. KCL had potent antipyretic effect on fever model induced by triple vaccine in rabbits. Bacteriostatic and antiviral experiment in vitro showed the drug had quite strong inhibitory effects for Streptococcus hemolyticus, Staphylococcus aureus, Flexners Dysentery bacillus, Diplococcus pneumoniae and Pseudomonas aeruginosa, and it could potently inhibit the respiratory syncytial virus. KCL is an effective drug in treating bronchopneumonia and acute bronchitis.  相似文献   
32.
Y R Zhao  D F Zhang  C Q Pan 《中华内科杂志》1992,31(11):686-8, 730
Viral markers were studied in 79 cases of viral hepatitis with hepatic failure. The results were shown as follows: 8 cases were positive for anti-HAV IgM (10.12%); 76 cases positive for HBsAg or anti-HBc IgM (96.20%) and 41 cases positive for anti-HCV antibodies (51.89%). Among those with anti-HCV positive, 35 cases were co-infected with HBV, 5 cases with HAV and/or HCV, only one was infected with HCV alone 2 cases were HD-Ag positive (2.52%) and one not identified (1.27%). With the reference of clinical findings, patients co-infected with HBV/HCV or anti-HBc IgM positive were more critical and usually entail higher mortality. In cases with HCV co-infections, the positive HBV replication markers seems to be reduced. Hepatic failure without HBV replicative markers had a high rate of hepatic coma as well as poor outcome.  相似文献   
33.
34.
Monoamine oxidase (MAO) A and B play an important role in regulating levels of biogenic amines. MAO A and B cDNAs have been cloned and the deduced amino acids share 73% sequence identity. The genes for MAOA and B are comprised of 15 exons interspersed by 14 introns, span at least 60 kb and exhibit identical exon-intron organization. These findings suggest that the MAOA and MAOB genes are derived from the duplication of a common ancestral gene. The core promoter region of MAOA is comprised of two 90 bp repeats, each of which contains two Spl elements and lacks a TATA box. The MAOB core promoter region contains two sets of overlapping Spl sites which flank a CACCC element all upstream of a TATA box. The different organization of the MAOA and MAOB promoters may underlie their different cell and tissue specific expression.  相似文献   
35.
36.
37.
Bipolar disorder (manic depressive disease) affects 1% of the United States population. These persons suffer from prolonged episodes of extreme elation and depression. There is a significant incidence of dental pathosis and a need for dental care among these patients. The medications used for the treatment of this disease, their physiologic effects, and their interactions with the drugs used in dentistry are reviewed.  相似文献   
38.
39.
40.
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