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   6411篇
  免费   537篇
  国内免费   24篇
耳鼻咽喉   56篇
儿科学   260篇
妇产科学   128篇
基础医学   776篇
口腔科学   114篇
临床医学   753篇
内科学   1412篇
皮肤病学   58篇
神经病学   473篇
特种医学   227篇
外科学   1070篇
综合类   175篇
一般理论   2篇
预防医学   625篇
眼科学   127篇
药学   405篇
中国医学   15篇
肿瘤学   296篇
  2023年   32篇
  2022年   50篇
  2021年   93篇
  2020年   78篇
  2019年   100篇
  2018年   121篇
  2017年   94篇
  2016年   106篇
  2015年   133篇
  2014年   155篇
  2013年   246篇
  2012年   417篇
  2011年   396篇
  2010年   211篇
  2009年   199篇
  2008年   314篇
  2007年   382篇
  2006年   392篇
  2005年   385篇
  2004年   397篇
  2003年   334篇
  2002年   276篇
  2001年   133篇
  2000年   120篇
  1999年   135篇
  1998年   111篇
  1997年   94篇
  1996年   81篇
  1995年   55篇
  1994年   62篇
  1993年   67篇
  1992年   64篇
  1991年   92篇
  1990年   74篇
  1989年   70篇
  1988年   82篇
  1987年   67篇
  1986年   55篇
  1985年   68篇
  1984年   49篇
  1983年   48篇
  1981年   39篇
  1980年   34篇
  1979年   35篇
  1978年   29篇
  1976年   44篇
  1975年   34篇
  1974年   26篇
  1973年   32篇
  1972年   26篇
排序方式: 共有6972条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
A national study was conducted between 1991 and 1994 to explore and describe the changing role of the nurse teacher following the introduction of Project 2000 pre-registration nursing courses. Multiple methods were used to collect data from a wide variety of respondents (nurse teachers, midwife teachers, clinical nurses, health service managers and higher education lecturers). This paper presents the findings relating to the impact of Project 2000 and the move into higher education on the continuing educational needs of nurse teachers. Views on college strategies for staff development, the changing nature of teachers'academic and professional development needs and the problems of the conflicting demands experienced are reported. The research highlights the need for clinical credibility to be clearly defined in relation to nurse teachers and for educational institutions to place more emphasis on teachers'clinical development if the rhetoric of policy is to become a reality.  相似文献   
45.
46.
Alcoholic inpatients evaluated the level of empathy demonstrated by a purported alcoholism counselor. Forty-two detoxified subjects viewed a 15-min videotape of a simulated alcoholism counseling session. Subjects had been randomly assigned to one of two groups: Group 1 was told that the counselor they were about to see was a recovering alcoholic whose empathy they were to evaluate. The subjects in Group 2 were given the same instructions; however, the information concerning the counselor's drinking history was omitted. A form of the Barrett-Lennard Relationship Inventory (BLRI) was administered immediately after the viewing. No statistical differences between group means on the empathy subscale of the BLRI were found. This finding does not support the contention that a history of drinking and rehabilitation enhances the perception of counselor empathy among alcoholics.  相似文献   
47.
48.
If phenylketonuria (PKU) is not treated from an early age with a reduced phenylalanine diet, irreversible brain damage may occur. Although dietary intervention can do nothing to alter this impairment once it occurs, there is some evidence to suggest that a low phenylalanine diet may help to reduce the level of behavioural disturbances frequently experienced by people with untreated PKU. Using this evidence, dietary intervention was used in response to the challenging behaviour of a 30-year-old man with profound learning disabilities. Initial improvements were observed, but overall the results were inconclusive. Possible confounding factors are discussed. An unusual reaction to neuroleptic medication whilst on the diet is also documented.  相似文献   
49.
50.
N-methyl-D-aspartate (NMDA) receptor/channel antagonists have previously been shown to impair spatial working memory and hippocampal long-term potentiation. The present experiment investigated the effects of a variety of doses of NMDA antagonists on a working memory task in rats involving an auditory delayed conditional discrimination. Signal detection analysis and an exponential memory decay model were used to extract independent measures of stimulus discriminability and rate of forgetting. A competitive NMDA antagonist, (CPP, 0.33, 1.0, 10.0 mg/kg, IP) produced a reduction in discriminability which was linearly related to log dose, but which was only clear at the 10 mg/kg dose. Rate of forgetting was not increased by any dose. Similar results were obtained with a non-competitive antagonist (MK-801, 0.1, 0.33 mg/kg, IP). These data suggest that doses of NMDA receptor channel antagonists sufficient to disrupt hippocampal long-term potentiation and radial arm maze performance will also disrupt delayed conditional discrimination. The effect on delayed conditional discrimination is due to a disruption of stimulus discriminability and not to an increased rate of forgetting. The extent to which these effects relate to the reported changes in hippocampal long-term potentiation and radial arm maze performance remains to be determined.  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