全文获取类型
收费全文 | 35760篇 |
免费 | 2311篇 |
国内免费 | 474篇 |
专业分类
耳鼻咽喉 | 481篇 |
儿科学 | 930篇 |
妇产科学 | 701篇 |
基础医学 | 4586篇 |
口腔科学 | 1743篇 |
临床医学 | 2927篇 |
内科学 | 7371篇 |
皮肤病学 | 745篇 |
神经病学 | 2535篇 |
特种医学 | 1188篇 |
外国民族医学 | 2篇 |
外科学 | 4613篇 |
综合类 | 1238篇 |
现状与发展 | 1篇 |
一般理论 | 14篇 |
预防医学 | 3187篇 |
眼科学 | 634篇 |
药学 | 3061篇 |
8篇 | |
中国医学 | 427篇 |
肿瘤学 | 2153篇 |
出版年
2023年 | 223篇 |
2022年 | 638篇 |
2021年 | 1108篇 |
2020年 | 718篇 |
2019年 | 947篇 |
2018年 | 1114篇 |
2017年 | 820篇 |
2016年 | 890篇 |
2015年 | 1117篇 |
2014年 | 1314篇 |
2013年 | 1621篇 |
2012年 | 2193篇 |
2011年 | 2357篇 |
2010年 | 1451篇 |
2009年 | 1261篇 |
2008年 | 1786篇 |
2007年 | 1884篇 |
2006年 | 1720篇 |
2005年 | 1566篇 |
2004年 | 1469篇 |
2003年 | 1434篇 |
2002年 | 1357篇 |
2001年 | 1092篇 |
2000年 | 1004篇 |
1999年 | 731篇 |
1998年 | 390篇 |
1997年 | 372篇 |
1996年 | 298篇 |
1995年 | 270篇 |
1994年 | 283篇 |
1993年 | 241篇 |
1992年 | 422篇 |
1991年 | 407篇 |
1990年 | 385篇 |
1989年 | 362篇 |
1988年 | 315篇 |
1987年 | 263篇 |
1986年 | 282篇 |
1985年 | 293篇 |
1984年 | 187篇 |
1983年 | 137篇 |
1982年 | 123篇 |
1981年 | 106篇 |
1980年 | 113篇 |
1979年 | 177篇 |
1978年 | 132篇 |
1977年 | 112篇 |
1976年 | 106篇 |
1975年 | 142篇 |
1974年 | 124篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
JM Martín† L Calduch† C Monteagudo‡ I Molina† D Ramón† V Alonso† E Jordᆠ《Journal of the European Academy of Dermatology and Venereology》2006,20(4):428-431
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified. 相似文献
3.
Mariana Spitz Alexandre Aluízio Costa Machado Rodrigo do Carmo Carvalho Fernanda Martins Maia Monica Santoro Haddad Dagoberto Calegaro Milberto Scaff Egberto Reis Barbosa 《Movement disorders》2006,21(9):1520-1522
We report on 3 patients with pseudoathetosis, which are involuntary, slow, writhing movements due to loss of proprioception. 相似文献
4.
Marcondes C Fran?a Maria E Calcagnotto Jaderson C da Costa Iscia Lopes-Cendes 《Movement disorders》2006,21(7):1051-1053
Spinocerebellar ataxia (SCA) types 2 and 3 are autosomal-dominant neurodegenerative disorders caused by mutations in two different genes. We identified mutations for SCA2 and SCA3 segregating simultaneously in a single Brazilian family. The index patient had SCA2, whereas her two second-degree cousins had SCA3. Disease was more rapidly progressive in the SCA2 patient, who presented severe brainstem and pancerebellar atrophy, as opposed to the two SCA3 patients, who had only mild cerebellar vermian atrophy. In such situations, molecular confirmation of all patients may avoid misdiagnosis of SCA subtypes and eventual errors in predictive testing of unaffected family members. 相似文献
5.
6.
Afterpotential characteristics and firing patterns in maturing rat hippocampal CA1 neurones in in vitro slices. 总被引:2,自引:0,他引:2
The postnatal evolution of depolarizing after-potentials (DAPs) and after-hyperpolarizations (AHPs) was studied in rat CA1 hippocampal neurones (5-68 days of age) using in vitro slices. Results were pooled into 4 age groups: P5-9, P10-16, P17-24 and P26-68. In P5-9 cells, DAPs were seen as passive signals, with a time constant similar to the time constant of the membrane. The evolution of the DAP was characterized by a decrease in amplitude, an increase in duration and a change in contour. In P10-16 and P17-24 cells, the DAPs often had a plateau or a hump-like shape which increased the probability of firing and the occurrence of spike doublets. The firing pattern and bursting behaviour of P10-16 CA1 neurones differed from the pattern typical of the adult. P5-9 and P10-16 cells had post-burst AHPs with a smaller amplitude and a more prolonged early phase than at late stages of development. 相似文献
7.
C de Costa 《The Medical journal of Australia》1986,144(13):721-722
8.
9.
10.