全文获取类型
收费全文 | 4369篇 |
免费 | 254篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 38篇 |
儿科学 | 234篇 |
妇产科学 | 65篇 |
基础医学 | 353篇 |
口腔科学 | 101篇 |
临床医学 | 277篇 |
内科学 | 878篇 |
皮肤病学 | 90篇 |
神经病学 | 272篇 |
特种医学 | 91篇 |
外科学 | 1029篇 |
综合类 | 130篇 |
一般理论 | 2篇 |
预防医学 | 160篇 |
眼科学 | 262篇 |
药学 | 286篇 |
中国医学 | 29篇 |
肿瘤学 | 336篇 |
出版年
2023年 | 51篇 |
2022年 | 86篇 |
2021年 | 199篇 |
2020年 | 103篇 |
2019年 | 127篇 |
2018年 | 146篇 |
2017年 | 113篇 |
2016年 | 145篇 |
2015年 | 145篇 |
2014年 | 187篇 |
2013年 | 254篇 |
2012年 | 379篇 |
2011年 | 344篇 |
2010年 | 208篇 |
2009年 | 135篇 |
2008年 | 237篇 |
2007年 | 224篇 |
2006年 | 180篇 |
2005年 | 175篇 |
2004年 | 182篇 |
2003年 | 154篇 |
2002年 | 92篇 |
2001年 | 103篇 |
2000年 | 80篇 |
1999年 | 67篇 |
1998年 | 37篇 |
1997年 | 38篇 |
1996年 | 25篇 |
1995年 | 20篇 |
1994年 | 17篇 |
1993年 | 7篇 |
1992年 | 33篇 |
1991年 | 35篇 |
1990年 | 23篇 |
1989年 | 32篇 |
1988年 | 28篇 |
1987年 | 18篇 |
1986年 | 16篇 |
1985年 | 26篇 |
1984年 | 19篇 |
1983年 | 15篇 |
1982年 | 8篇 |
1981年 | 7篇 |
1980年 | 13篇 |
1979年 | 9篇 |
1978年 | 9篇 |
1976年 | 9篇 |
1974年 | 15篇 |
1973年 | 7篇 |
1972年 | 9篇 |
排序方式: 共有4633条查询结果,搜索用时 140 毫秒
1.
2.
3.
4.
5.
6.
A rare case of a maxillo-mandibular band in a 21 year female patient is reported. Possibility of its being a remnant of buccaphary geal membrane is discussed in the light of clinical and histological findings. 相似文献
7.
Of 132 children with bladder stones seen in 1 year, 94% were boys and 73% were aged between 1 and 5 years. Significant malnutrition and evidence of vitamin deficiency were absent. Wheat bread was the dietary staple, while the intake of milk and dairy products, eggs and meat was very low. Analysis of 29 stones showed them to consist mainly of calcium oxalate and uric acid, with small amounts of calcium phosphate and magnesium ammonium phosphate in some cases. The composition of the surface and central parts of the stones, examined in 20 cases, was usually different. The nucleus was formed almost entirely of calcium oxalate and uric acid in four and three cases respectively, whereas the surface layers were composed of other ingredients. In another case the nucleus was composed entirely of xanthine, which indicated a diagnosis of xanthinuria. 相似文献
8.
9.
D C Holmes W R Grigsby V K Goel J C Keller 《The International journal of oral & maxillofacial implants》1992,7(4):450-458
Using the finite element method, this study modeled a 4.0 x 13.0-mm IMZ implant, restored with a cast gold crown, to examine the influence of the polyoxymethylene (POM) intramobile element (IME) on the transmission of vertical and oblique forces. Stress concentrations in the bone and in components of the implant system were much greater under a 30-degree load than under an equal vertical load. Stress transmission to bone occurred chiefly in the crestal region, and these stresses were not reduced when the IME was modeled in POM rather than in titanium. Maximum stress concentrations occurred in the fastening screw. 相似文献
10.
D P Muzumdar A Goel R Mistry S Gujral S Fattepurkar 《Journal of clinical neuroscience》2004,11(5):534-537
An 18-year old boy presented with a tumour involving a large part of the petrous bone. A radical resection of a petrous bone 'aneurysmal bone cyst' was achieved. A large defect in the dura adjoining the posterior surface of the petrous bone was made during surgery. Post-operative MR imaging showed complete tumour resection but herniation of cerebellum into the operative defect, a phenomenon probably assisting to seal the site of cerebrospinal fluid fistula. 相似文献