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   26691篇
  免费   2008篇
  国内免费   70篇
耳鼻咽喉   349篇
儿科学   835篇
妇产科学   533篇
基础医学   3275篇
口腔科学   811篇
临床医学   2926篇
内科学   4874篇
皮肤病学   405篇
神经病学   2438篇
特种医学   985篇
外科学   4067篇
综合类   366篇
一般理论   20篇
预防医学   2407篇
眼科学   590篇
药学   2213篇
中国医学   21篇
肿瘤学   1654篇
  2023年   116篇
  2022年   180篇
  2021年   513篇
  2020年   297篇
  2019年   539篇
  2018年   613篇
  2017年   455篇
  2016年   464篇
  2015年   564篇
  2014年   830篇
  2013年   1135篇
  2012年   1774篇
  2011年   1771篇
  2010年   997篇
  2009年   901篇
  2008年   1675篇
  2007年   1705篇
  2006年   1721篇
  2005年   1691篇
  2004年   1564篇
  2003年   1407篇
  2002年   1320篇
  2001年   403篇
  2000年   381篇
  1999年   427篇
  1998年   306篇
  1997年   219篇
  1996年   207篇
  1995年   185篇
  1994年   196篇
  1993年   166篇
  1992年   234篇
  1991年   239篇
  1990年   215篇
  1989年   226篇
  1988年   235篇
  1987年   225篇
  1986年   202篇
  1985年   204篇
  1984年   174篇
  1983年   164篇
  1982年   152篇
  1981年   134篇
  1980年   107篇
  1979年   141篇
  1978年   137篇
  1977年   104篇
  1976年   90篇
  1975年   104篇
  1973年   103篇
排序方式: 共有10000条查询结果,搜索用时 529 毫秒
1.
2.
3.
4.
Quality of Life Research - This study investigated the PROMIS Self-Efficacy Measure for Managing Chronic Conditions (PROMIS-SE) domain distributions and examined the factor structure of the...  相似文献   
5.
6.
7.
8.
AIM: Cardiovascular risk factors can be present in children and young adults. We previously found abnormal microvascular function in children who had glucose intolerance and insulin resistance. The aim of the present study was to investigate whether they also have abnormalities in left ventricular mass (LVM) and arterial stiffness. METHODS: We measured heart dimensions and LVM using echocardiography, and arterial stiffness using pulse wave analysis in 23 children with good glucose handling (postfeeding glucose: 3.9 to 5 mmol/L) and 21 with poor glucose handling (7.7 to 11.4 mmol/L). RESULTS: The time to pulse reflection was slightly shorter in the poorer glucose handlers (mean+/-SD: 143+/-10 vs 153+/-20 ms, P=0.04), suggestive of increased arterial stiffness. Also in this group, there were significant relationships between intraventricular septal thickness, blood pressure and body mass index, but not in the normal glucose handlers. CONCLUSIONS: We have found that normal children who are in the lowest quintile of glucose tolerance in comparison with their peers are exhibiting the first signs of arterial stiffening. In addition, we have seen the beginnings of a relationship between blood pressure, body mass index and left ventricular enlargement in this group. While these changes may not yet be clinically significant, their emergence might be further evidence of early predisposition to cardiovascular disease.  相似文献   
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.
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   
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