全文获取类型
收费全文 | 22725篇 |
免费 | 1677篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 211篇 |
儿科学 | 542篇 |
妇产科学 | 539篇 |
基础医学 | 3261篇 |
口腔科学 | 383篇 |
临床医学 | 2480篇 |
内科学 | 4770篇 |
皮肤病学 | 611篇 |
神经病学 | 2082篇 |
特种医学 | 884篇 |
外科学 | 2896篇 |
综合类 | 129篇 |
一般理论 | 6篇 |
预防医学 | 2056篇 |
眼科学 | 241篇 |
药学 | 1705篇 |
1篇 | |
中国医学 | 52篇 |
肿瘤学 | 1604篇 |
出版年
2023年 | 179篇 |
2022年 | 246篇 |
2021年 | 418篇 |
2020年 | 337篇 |
2019年 | 492篇 |
2018年 | 534篇 |
2017年 | 433篇 |
2016年 | 482篇 |
2015年 | 542篇 |
2014年 | 688篇 |
2013年 | 1104篇 |
2012年 | 1555篇 |
2011年 | 1527篇 |
2010年 | 900篇 |
2009年 | 828篇 |
2008年 | 1269篇 |
2007年 | 1304篇 |
2006年 | 1280篇 |
2005年 | 1287篇 |
2004年 | 1147篇 |
2003年 | 982篇 |
2002年 | 970篇 |
2001年 | 392篇 |
2000年 | 384篇 |
1999年 | 389篇 |
1998年 | 283篇 |
1997年 | 211篇 |
1996年 | 214篇 |
1995年 | 209篇 |
1994年 | 179篇 |
1993年 | 148篇 |
1992年 | 256篇 |
1991年 | 262篇 |
1990年 | 236篇 |
1989年 | 262篇 |
1988年 | 231篇 |
1987年 | 203篇 |
1986年 | 181篇 |
1985年 | 199篇 |
1984年 | 168篇 |
1983年 | 138篇 |
1982年 | 119篇 |
1981年 | 87篇 |
1979年 | 109篇 |
1978年 | 88篇 |
1977年 | 92篇 |
1976年 | 72篇 |
1975年 | 74篇 |
1974年 | 75篇 |
1973年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
53.
54.
55.
56.
Kevin D. Hyde Abdullah M. S. Al-Hatmi Birgitte Andersen Teun Boekhout Walter Buzina Thomas L. DawsonJr. Dan C. Eastwood E. B. Gareth Jones Sybren de Hoog Yingqian Kang Joyce E. Longcore Eric H. C. McKenzie Jacques F. Meis Laetitia Pinson-Gadais Achala R. Rathnayaka Florence Richard-Forget Marc Stadler Bart Theelen Benjarong Thongbai Clement K. M. Tsui 《Fungal Diversity》2018,93(1):161-194
An account is provided of the world’s ten most feared fungi. Within areas of interest, we have organized the entries in the order of concern. We put four human pathogens first as this is of concern to most people. This is followed by fungi producing mycotoxins that are highly harmful for humans; Aspergillus flavus, the main producer of aflatoxins, was used as an example. Problems due to indoor air fungi may also directly affect our health and we use Stachybotrys chartarum as an example. Not everyone collects and eats edible mushrooms. However, fatalities caused by mushroom intoxications often make news headlines and therefore we include one of the most poisonous of all mushrooms, Amanita phalloides, as an example. We then move on to the fungi that damage our dwellings causing serious anxiety by rotting our timber structures and flooring. Serpula lacrymans, which causes dry rot is an excellent example. The next example serves to represent all plant and forest pathogens. Here we chose Austropuccinia psidii as it is causing devastating effects in Australia and will probably do likewise in New Zealand. Finally, we chose an important amphibian pathogen which is causing serious declines in the numbers of frogs and other amphibians worldwide. Although we target the top ten most feared fungi, numerous others are causing serious concern to human health, plant production, forestry, other animals and our factories and dwellings. By highlighting ten feared fungi as an example, we aim to promote public awareness of the cost and importance of fungi. 相似文献
57.
Jonas Vinstrup Joaquin Calatayud Markus D. Jakobsen Emil Sundstrup Jørgen R. Jørgensen Jose Casaña Lars L. Andersen 《Journal of hand therapy》2018,31(1):111-121
Study Design
Cross-sectional.Purpose of the Study
This study evaluates finger flexion and extension strengthening exercises using elastic resistance in chronic stroke patients.Methods
Eighteen stroke patients (mean age: 56.8 ± 7.6 years) with hemiparesis performed 3 consecutive repetitions of finger flexion and extension, using 3 different elastic resistance levels (easy, moderate, and hard). Surface electromyography was recorded from the flexor digitorum superficialis (FDS) and extensor digitorum (ED) muscles and normalized to the maximal electromyography of the non-paretic arm.Results
Maximal grip strength was 39.2 (standard deviation: 12.5) and 7.8 kg (standard deviation: 9.4) in the nonparetic and paretic hand, respectively. For the paretic hand, muscle activity was higher during finger flexion exercise than during finger extension exercise for both ED (30% [95% confidence interval {CI}: 19-40] vs 15% [95% CI: 5-25] and FDS (37% [95% CI: 27-48] vs 24% [95% CI: 13-35]). For the musculature of both the FDS and ED, no dose-response association was observed for resistance and muscle activity during the flexion exercise (P > .05).Conclusion
The finger flexion exercise showed higher muscle activity in both the flexor and extensor musculature of the forearm than the finger extension exercise. Furthermore, greater resistance did not result in higher muscle activity during the finger flexion exercise. The present results suggest that the finger flexion exercise should be the preferred strengthening exercise to achieve high levels of muscle activity in both flexor and extensor forearm muscles in chronic stroke patients. The finger extension exercise may be performed with emphasis on improving neuromuscular control.Level of Evidence
4b. 相似文献58.
The international prevalence and variability of nonadherence to the nonpharmacologic treatment regimen after heart transplantation: Findings from the cross‐sectional BRIGHT study 下载免费PDF全文
59.
60.