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   5313篇
  免费   49篇
  国内免费   1篇
管理学   177篇
民族学   76篇
人才学   14篇
人口学   170篇
丛书文集   239篇
教育普及   1篇
理论方法论   3161篇
综合类   795篇
社会学   593篇
统计学   137篇
  2023年   5篇
  2022年   7篇
  2021年   8篇
  2020年   10篇
  2019年   24篇
  2018年   16篇
  2017年   22篇
  2016年   16篇
  2015年   24篇
  2014年   83篇
  2013年   29篇
  2012年   184篇
  2011年   151篇
  2010年   90篇
  2009年   74篇
  2008年   109篇
  2007年   153篇
  2006年   150篇
  2005年   146篇
  2004年   128篇
  2003年   91篇
  2002年   126篇
  2001年   127篇
  2000年   99篇
  1999年   51篇
  1998年   37篇
  1997年   24篇
  1996年   28篇
  1995年   32篇
  1994年   24篇
  1993年   167篇
  1992年   210篇
  1991年   273篇
  1990年   97篇
  1989年   206篇
  1988年   191篇
  1987年   213篇
  1986年   228篇
  1985年   260篇
  1984年   263篇
  1983年   246篇
  1982年   300篇
  1981年   334篇
  1980年   211篇
  1979年   39篇
  1978年   16篇
  1963年   3篇
  1959年   8篇
  1957年   6篇
  1955年   4篇
排序方式: 共有5363条查询结果,搜索用时 296 毫秒
131.
There is a need to investigate novel interventions that promote worksite physical activity and wellness. OBJECTIVE: The authors' purpose in this study was to evaluate the effectiveness of a 12-week walking program supplemented with a pedometer, computer educational program, and weekly e-mails. METHODS: College faculty and staff participated in a one-group pre-posttest study to determine whether the 12-week walking intervention had an effect on body mass index (BMI), blood pressure, blood glucose, and cholesterol. The authors also determined participant-perceived wellness effects. RESULTS: The authors observed differences between baseline and follow-up in BMI (p = .024), blood glucose (p = .06), and total cholesterol (p = .09). The program had a moderate effect on fitness, mood, health awareness, nutrition, and health. CONCLUSIONS: It is incumbent that experts develop innovative worksite physical activity and wellness programs. A pedometer-monitored walking program is one way that a worksite health initiative can improve the health and wellness of its employees and simultaneously reduce health-care costs.  相似文献   
132.
OBJECTIVE: Despite beliefs about weight gain in college, few researchers have evaluated this phenomenon. PARTICIPANTS: Participants were 18- to 31-year-old students at a midwestern university. The dependent variable was body mass index (BMI) change. METHODS: The authors extracted predictor variables from a Health Risk Appraisal. These included clinical, medical history, medical usage, medications, pain or chronic conditions, perceptual measures, and behavioral factors. The authors performed an ordinal regression technique separately by gender. RESULTS: No predictors were significant for men. Women in the BMI gain group were (1) more likely to consume alcohol, use maladaptive coping behaviors, eat foods low in fiber, and consume caffeine; and (2) less likely to be stress-free, to eat cruciferous vegetables, and to refrain from eating high-cholesterol foods. CONCLUSIONS: The lack of research on predictors of and interventions for reducing BMI gain among college students warrants more research.  相似文献   
133.
OBJECTIVE: The authors' goal was to show how risk perceptions regarding unplanned sexual activity following alcohol use are prospectively related to subsequent alcohol consumption. PARTICIPANTS: Undergraduate students (N = 380) completed questionnaires at 2 time points during their freshman year. METHODS: In the middle of the academic year (T1), students estimated their risk of engaging in unplanned sex and reported their alcohol use during the previous term. Four months later (T2), they again reported alcohol use and indicated whether they had engaged in unplanned sex since T1. RESULTS: Students who consumed more alcohol at T1 rated their risk of unplanned sex more highly, suggesting relative accuracy. Those with higher risk perceptions consumed more alcohol at T2 (controlling for T1 use), suggesting that they maintained the high-risk behavior. Last, those who were unrealistically optimistic (ie, estimated low risk at T1 yet had unplanned sex by T2) reported greater alcohol use at T2. CONCLUSIONS: These findings highlight the role that risk perceptions regarding sexual activity may play in college students' alcohol use.  相似文献   
134.
Aging leads to significant losses in muscle mass, strength, and the ability to independently perform activities of daily living (ADL). Typically, standard resistance training (RT) has been used to reduce these losses in function by maintaining or even increasing muscle strength in older adults. Increasing strength does not necessarily, however, result in an increase in the ability to perform ADL. There is now research suggesting that muscle power is more closely associated with the performance of ADL than muscle strength is, so training for muscle power might lead to more beneficial results in functional performance. This review of studies investigating the effect of training on ADL performance in older adults indicated that standard RT is effective in increasing strength in older adults, but power training that contains high-velocity contractions might be a more optimal means of training older adults when the emphasis is on increasing the performance of ADL.  相似文献   
135.
This study examined the relationships between older women's comparison styles, physical self-perceptions, and functional fitness. Participants were community-dwelling women (N = 102, age 65-99) living in the mid-Atlantic region of the United States. Individuals were categorized as relying primarily on social comparisons, temporal comparisons, or a combination of both styles. Also of interest was whether individuals evaluated themselves positively or negatively when making comparisons. Participants who evaluated themselves positively as compared with others were found to have higher levels of physical self-perception. Analyses revealed that women who relied primarily on temporal comparisons had higher self-perceptions of their functional ability than those who relied on a combination of comparison styles. An avoidance of both temporal and social comparisons was also related to higher levels of physical self-perception.  相似文献   
136.
137.
138.
139.
为民主而斗争是一项政治任务,也是一项教育任务.要促进充满活力的民主文化的产生,最根本的就是要认识到,教育必须被作为公共利益来看待.使高等教育沦为公司文化的附庸违反了教育支持和发展包含民主在内的公共空间的重要社会规则.从汤姆斯·杰佛逊到约翰·杜威,再到C.赖特·米尔斯,赞颂教育对于民主公共生活的根本的重要性成为一个悠久的传统.  相似文献   
140.
人类的自救     
在这个过于巨大和复杂的世界中,对数量庞大、形色各异的人群进行有效和严格的控制是行不通的.尽管我们有着最好的专家学者和最精密的电脑辅助,自然灾害仍超出了人类的理解范围.  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