全文获取类型
收费全文 | 7161篇 |
免费 | 314篇 |
国内免费 | 3篇 |
专业分类
7478篇 |
出版年
2021年 | 60篇 |
2020年 | 103篇 |
2019年 | 110篇 |
2018年 | 132篇 |
2017年 | 132篇 |
2016年 | 145篇 |
2015年 | 115篇 |
2014年 | 143篇 |
2013年 | 780篇 |
2012年 | 219篇 |
2011年 | 267篇 |
2010年 | 167篇 |
2009年 | 186篇 |
2008年 | 214篇 |
2007年 | 244篇 |
2006年 | 201篇 |
2005年 | 200篇 |
2004年 | 206篇 |
2003年 | 203篇 |
2002年 | 225篇 |
2001年 | 113篇 |
2000年 | 100篇 |
1999年 | 101篇 |
1998年 | 124篇 |
1997年 | 127篇 |
1996年 | 110篇 |
1995年 | 100篇 |
1994年 | 96篇 |
1993年 | 118篇 |
1992年 | 112篇 |
1991年 | 81篇 |
1990年 | 86篇 |
1989年 | 88篇 |
1988年 | 79篇 |
1987年 | 92篇 |
1986年 | 72篇 |
1985年 | 75篇 |
1984年 | 99篇 |
1983年 | 93篇 |
1982年 | 105篇 |
1981年 | 96篇 |
1980年 | 98篇 |
1979年 | 95篇 |
1978年 | 111篇 |
1977年 | 108篇 |
1976年 | 96篇 |
1975年 | 109篇 |
1974年 | 93篇 |
1973年 | 70篇 |
1971年 | 60篇 |
排序方式: 共有7478条查询结果,搜索用时 15 毫秒
941.
942.
943.
944.
The social competence model (SCM) of cardiovascular disease (CVD) risk identifies combinations of goal-oriented strivings, expressive behaviors, and social skill deficits that contribute to persisting interpersonal difficulties and chronic health-damaging stress in youth. SCM hypotheses were tested on 187 Black and White adolescents who completed the Social Competence Interview (SCI) and later underwent ambulatory blood pressure (ABP) monitoring. Cluster analyses of stress narratives assessed via SCI identified 3 predicted stress profiles: agonistic (interpersonally focused), transcendent (self-development focused), and avoidant. Group comparisons using social, hemodynamic, and ABP data supported the SCM hypothesis that youths who exhibit the agonistic striving profile display diminished social competence, negative social impact, and heightened cardiovascular responding during a stress interview, and elevated ABP during normal social interactions, thus suggesting higher risk of CVD. 相似文献
945.
946.
Health problems of the urban poor have been attributed to psychosocial effects of environmental stress. Testing such models requires an ability to measure neighborhood characteristics that make life stressful. The City Stress Inventory (CSI) uses self-report to assess perceived neighborhood disorder and exposure to violence. Data from an interracial sample of urban adolescents show the CSI to be internally consistent, stable, and correlated with census indices of social disadvantage. Validity for stress research is indicated by correlations with trait depression, anger, hostility, self-esteem, and mood changes during a debate with an unfamiliar peer. The CSI can be completed by persons with an 8th-grade education. 相似文献
947.
948.
Stimulus Equivalence: Effects Of A Default-response Option On Emergence Of Untrained Stimulus Relations 总被引:6,自引:6,他引:0 下载免费PDF全文
Innis A Lane S Miller E Critchfield T 《Journal of the experimental analysis of behavior》1998,70(1):87-102
Human subjects were exposed to a concurrent-chains schedule in which reinforcer amounts, delays, or both were varied in the terminal links, and consummatory responses were required to receive points that were later exchangeable for money. Two independent variable-interval 30-s schedules were in effect during the initial links, and delay periods were defined by fixed-time schedules. In Experiment 1, subjects were exposed to three different pairs of reinforcer amounts and delays, and sensitivity to reinforcer amount and delay was determined based on the generalized matching law. The relative responding (choice) of most subjects was more sensitive to reinforcer amount than to reinforcer delay. In Experiment 2, subjects chose between immediate smaller reinforcers and delayed larger reinforcers in five conditions with and without timeout periods that followed a shorter delay, in which reinforcer amounts and delays were combined to make different predictions based on local reinforcement density (i.e., points per delay) or overall reinforcement density (i.e., points per total time). In most conditions, subjects' choices were qualitatively in accord with the predictions from the overall reinforcement density calculated by the ratio of reinforcer amount and total time. Therefore, the overall reinforcement density appears to influence the preference of humans in the present self-control choice situation. 相似文献
949.
The demand that epistemic support be explicated as rational compulsion has consistently undermined the dialogue between theology and science. Rational compulsion entails too restrictive a form of epistemic support for most scientific theorizing, let alone interdisciplinary dialogue. This essay presents a less restrictive form of epistemic support, explicated not as rational compulsion but as explanatory power. Once this notion of epistemic support is developed, a genuinely productive interdisciplinary dialogue between theology and science becomes possible. This essay closes by sketching how the Big Bang model from cosmology and the Christian doctrine of Creation can be viewed as supporting each other. 相似文献
950.
William E. Carroll 《Zygon》1998,33(2):271-274
Cornell College in Mount Vernon, Iowa, has established a new interdisciplinary program in science and religion. One of the features of this program is an undergraduate major in science and religion that requires substantial course work in at least one of the natural sciences as well as course work in philosophy, religion, and history. As a result of a grant from the John Templeton Foundation, Cornell College will offer a special course, God and Physics: From Aquinas to Quantum Mechanics (April 1998), and will sponsor an international symposium on creation and contemporary cosmology (April 1999). Opportunities exist for interested scholars to come to Cornell as Templeton Visiting Fellows in order to participate in these activities. 相似文献