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   6062篇
  免费   406篇
  国内免费   8篇
耳鼻咽喉   41篇
儿科学   324篇
妇产科学   165篇
基础医学   760篇
口腔科学   51篇
临床医学   1298篇
内科学   801篇
皮肤病学   68篇
神经病学   475篇
特种医学   149篇
外科学   374篇
综合类   88篇
一般理论   16篇
预防医学   878篇
眼科学   95篇
药学   508篇
  1篇
中国医学   10篇
肿瘤学   374篇
  2023年   24篇
  2022年   37篇
  2021年   59篇
  2020年   41篇
  2019年   111篇
  2018年   123篇
  2017年   85篇
  2016年   103篇
  2015年   99篇
  2014年   132篇
  2013年   285篇
  2012年   425篇
  2011年   446篇
  2010年   253篇
  2009年   162篇
  2008年   417篇
  2007年   428篇
  2006年   401篇
  2005年   443篇
  2004年   408篇
  2003年   367篇
  2002年   415篇
  2001年   33篇
  2000年   43篇
  1999年   34篇
  1998年   87篇
  1997年   82篇
  1996年   61篇
  1995年   69篇
  1994年   64篇
  1993年   56篇
  1992年   36篇
  1991年   32篇
  1990年   35篇
  1989年   26篇
  1988年   27篇
  1987年   21篇
  1986年   27篇
  1985年   35篇
  1984年   51篇
  1983年   38篇
  1982年   72篇
  1981年   42篇
  1980年   39篇
  1979年   29篇
  1978年   32篇
  1977年   25篇
  1976年   23篇
  1974年   20篇
  1972年   16篇
排序方式: 共有6476条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
96.
97.
98.
The duties performed by radiographers, which includes transferring patients onto and off the examination table, can increase their risk of developing back and neck pain. This study used a survey to identify the assistive transfer devices Australian radiography undergraduate students are familiar with and have had practise using in the clinical setting. It also sought to determine whether students are being encouraged by other radiographers to use these devices during clinical training and if they would conform to practicing unsafe transfers if instructed to by senior staff.Results indicated that radiography students were familiar with the majority of the surveyed assistive devices such as the Patslide and X-ray cassette slider. Many of the students were unlikely to participate in unsafe work practices and were able to provide alternative methods of transferring patients. However, some of the respondents could be coerced into participating in unsafe patient transfers. Radiographers should therefore be vigilant in refraining from practicing unsafe transfer techniques as it could lead to students believing it is acceptable and emulating these practices in the work place.  相似文献   
99.
100.
The distribution of food and nutrition policies and practices from 28 US states representing 6,732 secondary schools was evaluated using data from the 2008 School Health Profiles principal survey. School policies and practices evaluated were: availability of low-nutrient, energy-dense (LNED) snacks/drinks; use of healthy eating strategies; banning food marketing; availability of fruits and vegetables; and food package sizes. For each school, school-level demographic characteristics (percentage of students enrolled in free/reduced-price meals, minority enrollment, and geographic location) were also evaluated. Schools in small town/rural locations had significantly fewer policies that support healthy eating strategies and ban food marketing, and were less likely to serve fruits and vegetables at school celebrations, have fruits and vegetables available in vending or school stores, and limit serving-size packages. Schools serving the highest percentage of minority students consistently reported the same or better school food environments. However, schools serving the highest percentage of low-income students had varied results: vending and LNED vending policies were consistently better and fruit and vegetable availability–related policies were consistently worse. Disparities in the distribution of policies and practices that promote healthy school food environments seem most pronounced in small town/rural schools. The data also support the need for continued reinforcement and the potential for expansion of these efforts in urban and suburban areas and schools with highest minority enrollment.  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