全文获取类型
收费全文 | 35200篇 |
免费 | 2620篇 |
国内免费 | 106篇 |
专业分类
耳鼻咽喉 | 410篇 |
儿科学 | 992篇 |
妇产科学 | 678篇 |
基础医学 | 4569篇 |
口腔科学 | 876篇 |
临床医学 | 3835篇 |
内科学 | 6901篇 |
皮肤病学 | 559篇 |
神经病学 | 3030篇 |
特种医学 | 1352篇 |
外国民族医学 | 17篇 |
外科学 | 5290篇 |
综合类 | 431篇 |
一般理论 | 25篇 |
预防医学 | 3177篇 |
眼科学 | 648篇 |
药学 | 2618篇 |
中国医学 | 38篇 |
肿瘤学 | 2480篇 |
出版年
2023年 | 169篇 |
2022年 | 238篇 |
2021年 | 621篇 |
2020年 | 380篇 |
2019年 | 656篇 |
2018年 | 791篇 |
2017年 | 530篇 |
2016年 | 623篇 |
2015年 | 727篇 |
2014年 | 1045篇 |
2013年 | 1424篇 |
2012年 | 2168篇 |
2011年 | 2125篇 |
2010年 | 1195篇 |
2009年 | 1133篇 |
2008年 | 1995篇 |
2007年 | 2015篇 |
2006年 | 2052篇 |
2005年 | 1992篇 |
2004年 | 1887篇 |
2003年 | 1713篇 |
2002年 | 1610篇 |
2001年 | 746篇 |
2000年 | 787篇 |
1999年 | 744篇 |
1998年 | 437篇 |
1997年 | 340篇 |
1996年 | 312篇 |
1995年 | 272篇 |
1994年 | 255篇 |
1993年 | 244篇 |
1992年 | 498篇 |
1991年 | 454篇 |
1990年 | 430篇 |
1989年 | 381篇 |
1988年 | 408篇 |
1987年 | 349篇 |
1986年 | 364篇 |
1985年 | 336篇 |
1984年 | 303篇 |
1983年 | 277篇 |
1982年 | 193篇 |
1981年 | 195篇 |
1980年 | 179篇 |
1979年 | 232篇 |
1978年 | 190篇 |
1977年 | 154篇 |
1975年 | 143篇 |
1974年 | 154篇 |
1973年 | 179篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
Interaction effects between the 5‐hydroxy tryptamine transporter‐linked polymorphic region (5‐HTTLPR) genotype and family conflict on adolescent alcohol use and misuse 下载免费PDF全文
7.
8.
9.
Despite numerous studies of approach- and avoidant mindsets, relatively little research has addressed the impact of such motivational orientations on performance and emotion in a real-time, multi-task setting. A laboratory simulation is reported that examines the influence of an induced approach-centered, an avoidance-centered, and a “neutral” motivational mindset upon multiple aspects of task performance, self-regulatory cognition, and affect. Undergraduate females randomly assigned to one of three mindset conditions performed a simulated automobile drive across one practice and two experimental trials. Dependent measures included divided attention, behavioral indicators of driving “cautiousness” in relatively safe straight roadway sections as well as during more risk-filled driving, multiple aspects of self-regulatory thinking (including self-monitoring, intended effort, and self-administered consequences), and positive and negative affect. Results revealed that the avoidant mindset produced poorer executive attention (i.e., fewer correctly detected divided attention events), more “cautious” driving behavior and reduced performance variability (i.e., greater control) when driving on presumably safe, straight roadway sections, lower self-reports of intended effort, and greater negative affect relative to the approach mindset. Results are intepreted within a self-regulation-centered motivational framework. Implications of the multi-task simulation for the study of normal and disordered adjustment are considered. 相似文献
10.
Lisa A. Lang DDS MS David C. Holmes DDS MS Craig Passon DDS MS Robert M. Trombly DDS JD Jeffrey D. Astroth DDS MSPH Arnold F. Tavel DMD 《Journal of prosthodontics》2003,12(3):206-210
Using complete denture treatment as an introduction to clinical patient care for dental students, the purposes of the Complete Denture Prosthodontics Transition Clinic at the University of Colorado School of Dentistry are to reduce the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience, and to encourage development of student self-confidence and skills. In the 2002 spring semester, faculty at the University of Colorado School of Dentistry initiated the Complete Denture Prosthodontics Transition Clinic for DS-II (second-year) dental students, as an introduction to clinical patient care. Each patient was assigned to a team of two dental students. Three Division of Prosthodontics faculty members staffed each clinic session, providing a student-to-faculty ratio of approximately 6.6:1 and a patient-to-faculty ratio of approximately 3.3:1. All DS-II students in the Class of 2004 delivered their first complete dentures no later than 8 months (average, 184 days) after the last day of the preclinical complete denture prosthodontics course. The time from the diagnostic appointment through the denture placement appointment averaged 39 days for patients treated in this program, compared with an average of 98 days or more for previous classes. The program was successful in achieving the goal of reducing the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience. 相似文献