全文获取类型
收费全文 | 14124篇 |
免费 | 252篇 |
专业分类
管理学 | 2108篇 |
民族学 | 73篇 |
人才学 | 5篇 |
人口学 | 1360篇 |
丛书文集 | 77篇 |
教育普及 | 1篇 |
理论方法论 | 1279篇 |
现状及发展 | 1篇 |
综合类 | 155篇 |
社会学 | 6693篇 |
统计学 | 2624篇 |
出版年
2023年 | 95篇 |
2021年 | 71篇 |
2020年 | 211篇 |
2019年 | 303篇 |
2018年 | 331篇 |
2017年 | 452篇 |
2016年 | 367篇 |
2015年 | 252篇 |
2014年 | 317篇 |
2013年 | 2393篇 |
2012年 | 489篇 |
2011年 | 395篇 |
2010年 | 345篇 |
2009年 | 333篇 |
2008年 | 380篇 |
2007年 | 350篇 |
2006年 | 339篇 |
2005年 | 374篇 |
2004年 | 319篇 |
2003年 | 291篇 |
2002年 | 324篇 |
2001年 | 349篇 |
2000年 | 326篇 |
1999年 | 315篇 |
1998年 | 226篇 |
1997年 | 201篇 |
1996年 | 196篇 |
1995年 | 184篇 |
1994年 | 178篇 |
1993年 | 191篇 |
1992年 | 201篇 |
1991年 | 185篇 |
1990年 | 191篇 |
1989年 | 211篇 |
1988年 | 183篇 |
1987年 | 168篇 |
1986年 | 170篇 |
1985年 | 207篇 |
1984年 | 199篇 |
1983年 | 182篇 |
1982年 | 150篇 |
1981年 | 122篇 |
1980年 | 114篇 |
1979年 | 148篇 |
1978年 | 102篇 |
1977年 | 103篇 |
1976年 | 101篇 |
1975年 | 92篇 |
1974年 | 96篇 |
1973年 | 81篇 |
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
981.
982.
983.
Lawrence J. Becker Vita C. Rabinowitz Clive Seligman 《Evaluation and program planning》1980,3(3):159-164
Many utility companies offer their customers the choice of participation in an average payment plan, which enables them to pay a fixed sum for their utility bill each month (with final settlement at the end of the billing year), instead of the conventional “pay as you go” billing procedure. Because customers on average payment plans are protected from paying large bills during peak energy-use seasons and because the information about monthly energy use and its cost is perhaps less salient to them, it was hypothesized that customers on the average payment plan would use more electricity than customers not on the plan. Using a nonequivalent control group design, the electricity consumption of a selection of customers of two utility companies (Ns = 475 and 74) was examined. The results showed that there was no evidence to support the hypothesis. Since the logic of hypothesis testing does not permit the ready acceptance of the null hypothesis, several procedural, methodological, and statistical points were made to buttress the conclusion that the average payment plans had no effect on electricity consumption. 相似文献
984.
Psychological data was obtained from 1009 couples located in 5 countries who were practicing the temperature-rhythm method of birth control. In the U.S., survey instruments were distributed to 160 couples by mail with a 58% (92) return rate of completed questionnaires. The educational attainment of both men and women exceeded senior high school. Most wives were not gainfully employed, and 87% of the wives indicated that religious beliefs were considered important. The average couple had employed the rhythm method for 4 years and 9 months at the time of the survey. Independently, both husbands and wives completed a Byrne's Revised Repression-Sensitization scale, Rotter's I-E scale, and Attitude Toward Sex scale, a Reaction to the Temperature-Rhythm Method scale, and a sexual behavior inventory. Data indicated that the rhythm method was acceptable despite difficulties with periods of abstinence, with 84% regarding abstinence as relatively difficult or very diffiucult. Other results indicated that there was a relatively low response concordance between husbands and wives, and that couples who had pregnancies with the method or had abandoned the method had more liberal sexual attitudes than those who did not have pregnancies and continued the method. 相似文献
985.
Religion, economic development and lethal aggression 总被引:1,自引:0,他引:1
986.
987.
Miller BC 《Journal of sex research》2002,39(1):22-26
Studies of adolescent pregnancy risk are relevant to understanding responsible adolescent sexual behavior because most investigators have focused on the key proximal determinants of pregnancy--sexual intercourse and contraceptive use--rather than analyzing pregnancy status per se. Lesser pregnancy risk is associated with teens remaining sexually abstinent, postponing onset of intercourse, and having intercourse less often or with fewer partners, as well as by using contraception at first or most recent intercourse and by using contraception consistently over time. Living with a single parent, in a lower SES family, having older sexually active siblings or pregnant/parenting teenage sisters, being a victim of sexual abuse, and residing in disorganized/dangerous neighborhoods all place teens at elevated risk of adolescent pregnancy. Parent-child closeness or connectedness, and parental supervision or regulation of children, in combination with parents values against teen intercourse (or unprotected intercourse), decrease the risk of adolescent pregnancy. Studies about parent-child sexual communication and adolescent pregnancy risk are less conclusive, largely because of methodological complexities. 相似文献
988.
This study assessed child behavior problems and parent-child communication behaviors during problem solving in three groups of families with adolescent children: foster families, birthfamilies with a child at risk for behavior problems, and birthfamilies with a child not at risk. Levels of positive and negative communication behaviors in the foster families were similar to those in the lower-risk families and were significantly related to foster child behavior problems. 相似文献
989.
This study examines the relationship between socialist ideology and the current negative health lifestyles of the Russian population. We explore the possibility that Soviet-style socialism with its negation of individuality and individual initiative in health matters promoted the development of a passive orientation toward healthy living. Using a national sample, we compare the health practices of those Russians who wish to return to socialism as it was before Gorbachev to those of Russians who favor staying with the present political and economic course or adopting other reforms. If a socialist ideology has indeed fostered a lack of responsibility for individual health promotion in Russia today, those persons wishing to return to socialism would be less likely to adopt a positive health lifestyle. Our data show that this is indeed the case, as pro-socialist respondents demonstrate less activity toward achieving health than antisocialists--although neither group collectively practices a healthy way of life. 相似文献
990.
Aalsma MC Aalsma MC Zimet GD Fortenberry JD Blythe M Orr DP 《Journal of sex research》2002,39(4):259-263
The consistency of childhood sexual abuse (CSA) reporting was explored in this study. Two-hundred seventeen adolescents and young adults (ages 14-24) enrolled in urban health care clinics completed self-report questionnaires assessing CSA and other problem behaviors at enrollment and at 7 months. Results indicated that the stability of CSA self-report at two time points was poor (58% consistent nonreporters of CSA, 20% consistent reporters, 22% inconsistent reporters). Consistent and inconsistent reporters were differentiated on risk measures. Adolescents who endorsed more items from the CSA scale were five times more likely to be consistent reporters. In sum, adolescent CSA reporting was quite inconsistent over time. Using multi-item scales and assessing CSA at two time points enhances accuracy of reporting. 相似文献