全文获取类型
收费全文 | 20558篇 |
免费 | 402篇 |
国内免费 | 15篇 |
专业分类
管理学 | 2606篇 |
民族学 | 114篇 |
人才学 | 7篇 |
人口学 | 1846篇 |
丛书文集 | 168篇 |
理论方法论 | 1943篇 |
综合类 | 784篇 |
社会学 | 10207篇 |
统计学 | 3300篇 |
出版年
2023年 | 127篇 |
2021年 | 162篇 |
2020年 | 336篇 |
2019年 | 447篇 |
2018年 | 540篇 |
2017年 | 772篇 |
2016年 | 501篇 |
2015年 | 394篇 |
2014年 | 487篇 |
2013年 | 3377篇 |
2012年 | 753篇 |
2011年 | 681篇 |
2010年 | 563篇 |
2009年 | 488篇 |
2008年 | 584篇 |
2007年 | 592篇 |
2006年 | 592篇 |
2005年 | 523篇 |
2004年 | 429篇 |
2003年 | 387篇 |
2002年 | 410篇 |
2001年 | 498篇 |
2000年 | 403篇 |
1999年 | 421篇 |
1998年 | 317篇 |
1997年 | 287篇 |
1996年 | 253篇 |
1995年 | 267篇 |
1994年 | 265篇 |
1993年 | 264篇 |
1992年 | 293篇 |
1991年 | 286篇 |
1990年 | 275篇 |
1989年 | 247篇 |
1988年 | 266篇 |
1987年 | 275篇 |
1986年 | 230篇 |
1985年 | 252篇 |
1984年 | 254篇 |
1983年 | 226篇 |
1982年 | 220篇 |
1981年 | 194篇 |
1980年 | 170篇 |
1979年 | 201篇 |
1978年 | 163篇 |
1977年 | 131篇 |
1976年 | 156篇 |
1975年 | 167篇 |
1974年 | 124篇 |
1973年 | 95篇 |
排序方式: 共有10000条查询结果,搜索用时 178 毫秒
101.
The present study was conducted to assess differences in the behavioral and demographic characteristics of snuff (dip) users as compared to users of chewing tobacco. High School football players (1116) were surveyed concerning their use and perceptions of smokeless tobacco. Adolescent athletes who tried smokeless tobacco were more likely to be white, to use cigarettes, alcohol, and cigars and to have family users than those who never tried. Initial use was highest before the age of fourteen years and was influenced by friends, curiosity and family. Dippers tended to initiate use because of friends, while chewers started because of family users. Users of both dip and chew started primarily because of curiosity. Users of both were more likely to consume greater amounts to alcohol and cigarettes and to smoke cigars and pipes. It appears that the longer smokeless tobacco is consumed, the more likely both dip and chew will be used. Users of smokeless tobacco for more than two years tended to consume more of the product each week, used it for more hours/day, initiated use at an earlier age, and used it more often at school and work than those using it for less than two years. Use of cigars/pipes, consumption of alcohol, and quantity of cigarette consumption increased significantly with longer duration of smokeless tobacco use. Intervention and prevention programs would be helped by understanding differences between users of various smokeless tobacco products and differences related to the duration of use. In addition, further analyses of smokeless tobacco users should study chewers, dippers, and users of both separately. 相似文献
102.
This paper presents empirical evidence that an individual's decision to drive while drunk is negatively affected by the expected full price of driving drunk. The analysis uses a unique data set containing information on self-reported drunk driving matched to state-level drunk driving policies as well as to state excise taxes on beer. These are hypothesized and found to affect drunk driving. Further, we find interesting racial differences but surprisingly small differences by gender in the effect of socioeconomic and policy variables on drunk driving propensities. 相似文献
103.
Mark L. Savickas 《The Career development quarterly》1991,39(4):315-324
Examining concepts about work and love can help people increase their career success and life satisfaction. Career counselors may initiate this examination by eliciting clients' concepts about work and love. After hearing a client's ideas about work and love, counselors can compare this personal meaning to the social meaning of work and love. When this comparison reveals dysfunctional beliefs about work and love, counselors can link these beliefs to their client's career concerns. Such a linkage typically provokes a cognitive dissonance that motivates clients to modify their beliefs. Counselors can facilitate meaning modification by using client-centered and social influence techniques. 相似文献
104.
105.
A training project in a northern Canadian community providedan opportunity to examine participatory planning approachesand the meaning of work in First Nations communities. Focusgroups conducted three years after the unsuccessful interventionof a community economic development (CED) project suggest thatcomplex factors such as lack of support from community leadersand rate of pay for workers determine whether CED is alwaysappropriate in northern, First Nations contexts. 相似文献
106.
Barry R. Chiswick Yew Liang Lee Paul W. Miller 《The International migration review》2006,40(2):419-450
This article is concerned with the determinants of English language proficiency among immigrants in a longitudinal survey for Australia. It focuses on both visa category and variables derived from an economic model of the determinants of destination‐language proficiency among immigrants. Skills‐tested and economic immigrants have the greatest proficiency shortly after immigration, followed by family‐based visa recipients, with refugees having the lowest proficiency. Other variables the same, these differences disappear by 3.5 years after immigration for speaking skills; and although they diminish, they persist longer for reading and writing skills. The variables generated from the model of destination‐language proficiency (such as schooling and age at migration) are, in part, predictions of visa category, but they are more important statistically for explaining proficiency. 相似文献
107.
An alternative to farmer age as an indicator of life-cycle stage: The case for a farm family age index 总被引:2,自引:0,他引:2
In studies of farming, the age of the principal decision-maker (PDM) has been associated with numerous farm structural and managerial features and has been widely accepted as a good indicator of the influence of life-cycle factors on decision-making. As such, it has become an important aspect of many quantitative studies of agricultural change. However, contemporary studies of family farming demonstrate that the concept of a single PDM in family farms is becoming an anachronism as alternative enterprises, pluriactivity and the scale of family farms force more diffuse management/operating systems. This raises questions concerning whether the age of the PDM can still be taken as representative of farm structure, strategy or life-cycle stage? Using a study conducted in the Grampian Mountains region of Scotland in 2003 this note investigates the impact of using an alternative index—compiled by averaging the age of family members working on the farm. It suggests that PDM age is a relatively poor indicator of farm structural and managerial features compared to a family age index and calls for researchers to think about alternative approaches to measuring ‘age’ as an indicator. 相似文献
108.
109.
Research reports the uncertain outcome of variables affecting the life of a child of an MI parent. Nurses must avoid stereotyping children before assessment; they are to be in the forefront in assessing self-care skills and deficits to guide planning individual interventions for children and MI parents. Long-term research theory-based interventions will enhance mental health in high-risk children and families. 相似文献
110.