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   450篇
  免费   17篇
教育   356篇
科学研究   18篇
各国文化   4篇
体育   31篇
综合类   1篇
文化理论   3篇
信息传播   54篇
  2023年   3篇
  2022年   6篇
  2021年   10篇
  2020年   25篇
  2019年   28篇
  2018年   32篇
  2017年   45篇
  2016年   27篇
  2015年   23篇
  2014年   22篇
  2013年   93篇
  2012年   8篇
  2011年   6篇
  2010年   8篇
  2009年   11篇
  2008年   8篇
  2007年   14篇
  2006年   3篇
  2005年   7篇
  2004年   2篇
  2003年   6篇
  2002年   5篇
  2001年   7篇
  2000年   2篇
  1999年   3篇
  1998年   5篇
  1997年   3篇
  1996年   3篇
  1995年   3篇
  1994年   2篇
  1993年   4篇
  1992年   3篇
  1991年   5篇
  1990年   2篇
  1988年   4篇
  1985年   3篇
  1978年   2篇
  1977年   3篇
  1976年   2篇
  1975年   2篇
  1972年   1篇
  1971年   1篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
  1965年   1篇
  1935年   1篇
  1925年   1篇
  1921年   1篇
  1919年   2篇
排序方式: 共有467条查询结果,搜索用时 78 毫秒
1.
Genetics Home Reference is a free, online resource created and maintained by the National Library of Medicine. It is designed to provide genetic information to a wide variety of audiences, particularly the general public. The site consists of original information and links to other curated resources.  相似文献   
2.
Oh and LaRose (2016) contended that problem severity and channel publicness shape support seekers’ goals, time spent composing messages, and the sophistication of those messages. The current study seeks to replicate and extend Oh and LaRose’s study to produce a more accurate understanding of the factors that influence the sophistication of support-seeking messages online. Support seekers’ goals varied according to the severity of a stressor and the publicness of a channel, and the amount of time people spent composing a message influenced its sophistication. We extend the original study by examining associations that were not initially tested. Time spent composing messages mediated the influence of problem severity on the quality of people’s messages, and this effect was moderated by channel publicness.  相似文献   
3.
Abstract

Maternal dietary habits influence maternal and foetal health, representing a pathway for intervention to maximise pregnancy outcomes. Advice on energy intake is provided on a trimester basis, with no additional calories required in the first trimester and an additional 340?kcal?d?1 and 452?kcal?d?1 needed for the second and third trimesters. Energy intake depends on pre-gravid body mass index (BMI); underweight women are recommended an increase of 150, 200 and 300?kcal?d?1 during the first, second and third trimester, normal weight women an increase of 0, 350 and 500?kcal?d?1 and obese women an increase of 0, 450 and 350?kcal?day?1. The recommendations for carbohydrate and protein intake are 175?g?d?1 and 0.88–1.1?g?kgBM?d?1, with no change to fat intake. The number of pre-gravid obese women is rising; therefore, we need to regulate weight in women of childbearing age and limit gestational weight gain to within the recommended ranges [overweight women 6.8–11.3?kg and obese women 5.0–9.1?kg]. This can be achieved using nutritional interventions, as dietary changes have been shown to help with gestational weight management. As pregnancy has been identified as a risk factor for the development of obesity, normal weight women should gain 11.5–16.0?kg during pregnancy. While some research has shown that dietary interventions help to regulate gestational weight gain and promote postpartum weight loss to some extent, future research is needed to provide safe and effective guidelines to maximise these effects, while benefitting maternal and foetal health.  相似文献   
4.
Early childhood teacher educators frequently enhance their teaching by reading children’s books to their adult students. It is not unusual for faculty outside of early childhood to question devoting precious class time to read-alouds which they may consider a curious, if not frivolous, instructional strategy. Quality children’s literature can, however, enhance students’ experiences in the college classroom, contribute to their understanding of course content, promote their personal growth and self-understanding, increase their appreciation for quality children’s literature, and enhance their ability to integrate storybooks into their own teaching. Children’s books often capture a child’s point of view. They have the potential to provide historical or cultural perspectives on children and families. They also can lead to the examination of universal truths and can facilitate the discussion of sensitive or emotional issues A list of books with suggested uses is included.  相似文献   
5.
High turnover rates of early care and education teachers reduce the quality of education; unsatisfied teachers, suffering from stress or emotional exhaustion, are less equipped to promote children’s development and more likely to leave the classroom. We used data from a national survey of US early childhood educators (n?=?1129) to examine associations between teachers’ working conditions, well-being, and motivation with professional commitment and turnover intentions to move, leave, or remain. Multiple regression analyses revealed that more intrinsically motivated teachers were more likely to report intentions to move over leave, emotionally exhausted teachers were more likely to report intentions to leave, and lower teacher-reported working conditions predicted intentions to move or leave the field over staying. The results suggest that teachers’ well-being and perceived working conditions relate with their intentions to remain at their job or within the field and to their commitment to the profession.  相似文献   
6.
This investigation provided a comparative analysis of results of follow-up studies of graduates of doctoral programs at Ohio State and Michigan State universities. The same questionnaire survey and similar sampling procedures were used in both settings. The survey considered alumni perceptions of guidance committee activities, course work, comprehensive examinations, and dissertations. Most findings were consistent across both institutions (e.g., about one-fifth of the graduates from both universities wish they had taken more course work in research methodology). However, some striking contrasts were also found (e.g., the proportion of graduates who published articles based on their dissertations was 40% at one university and 23% at the other). The report offers recommendations for doctoral guidance committees suggested by the findings.  相似文献   
7.
8.
9.
Multistage, ultra-endurance events in hot, humid conditions necessitate thermal adaptation, often achieved through short term heat acclimation (STHA), to improve performance by reducing thermoregulatory strain and perceptions of heat stress. This study investigated the physiological, perceptual and immunological responses to STHA prior to the Marathon des Sables. Eight athletes (age 42 ± 4 years and body mass 81.9 ± 15.0 kg) completed 4 days of controlled hyperthermia STHA (60 min·day?1, 45°C and 30% relative humidity). Pre, during and post sessions, physiological and perceptual measures were recorded. Immunological measures were recorded pre-post sessions 1 and 4. STHA improved thermal comfort (P = 0.02), sensation (P = 0.03) and perceived exertion (P = 0.04). A dissociated relationship between perceptual fatigue and Tre was evident after STHA, with reductions in perceived Physical (P = 0.04) and General (P = 0.04) fatigue. Exercising Tre and HR did not change (P > 0.05) however, sweat rate increased 14% (P = 0.02). No changes were found in white blood cell counts or content (P > 0.05). Four days of STHA facilitates effective perceptual adaptations, without compromising immune status prior to an ultra-endurance race in heat stress. A greater physiological strain is required to confer optimal physiological adaptations.  相似文献   
10.

This research examines how higher education graduates in redemocratized countries, such as Hungary, receive information from multinational corporations regarding employment opportunities. It also assesses how the information exchange between higher education and the labour market, i.e. multinational corporations, shapes new relationships between these two entities. The findings from this study seem to suggest that multinational corporations have influenced Hungarian higher education institutions in several profound ways: (1) the redefinition of graduate recruitment procedures, (2) the shift in employee characteristics that employers value, (3) the implications for curricular design and teaching styles, and (4) the ranking and prestige of universities. The results of this study are not only useful for countries in transition to a market economy but for other countries as well.  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