收费全文 | 4034篇 |
免费 | 402篇 |
国内免费 | 703篇 |
2023年 | 52篇 |
2022年 | 89篇 |
2021年 | 104篇 |
2020年 | 128篇 |
2019年 | 125篇 |
2018年 | 168篇 |
2017年 | 160篇 |
2016年 | 155篇 |
2015年 | 122篇 |
2014年 | 127篇 |
2013年 | 365篇 |
2012年 | 224篇 |
2011年 | 295篇 |
2010年 | 243篇 |
2009年 | 224篇 |
2008年 | 260篇 |
2007年 | 355篇 |
2006年 | 347篇 |
2005年 | 251篇 |
2004年 | 170篇 |
2003年 | 121篇 |
2002年 | 108篇 |
2001年 | 90篇 |
2000年 | 86篇 |
1999年 | 83篇 |
1998年 | 48篇 |
1997年 | 35篇 |
1996年 | 22篇 |
1995年 | 32篇 |
1994年 | 24篇 |
1993年 | 28篇 |
1992年 | 26篇 |
1991年 | 27篇 |
1990年 | 46篇 |
1989年 | 29篇 |
1988年 | 21篇 |
1987年 | 25篇 |
1986年 | 19篇 |
1985年 | 29篇 |
1983年 | 13篇 |
1982年 | 21篇 |
1980年 | 13篇 |
1979年 | 14篇 |
1978年 | 14篇 |
1976年 | 12篇 |
1975年 | 13篇 |
1973年 | 15篇 |
1970年 | 13篇 |
1969年 | 11篇 |
1968年 | 14篇 |
The present study investigated the effects of infertility on Chinese women’s life satisfaction. Infertile women (n?=?466) who were seeking medical help completed a survey that included the Fertility Problem Inventory (FPI), the Dyadic Adjustment Questionnaire (DAS), the Connor-Davidson Resilience Scale (CD-RISC), the Satisfaction with Life Scale, and demographic variables. We used a moderated mediation model to test our hypotheses, with life satisfaction as the dependent variable, representations about the importance of parenthood as the independent variable, the impact of infertility on life domains as a mediator, and marital satisfaction and resilience as moderators. Results showed that representations about the importance of parenthood and the impact of infertility on life domains are two main types of infertility-related stress, which could play independent roles in predicting life satisfaction. Representations about the importance of parenthood had a negative indirect effect on life satisfaction through the impact of infertility on life domains, and the indirect effect of the impact of infertility on life domains was moderated by marital satisfaction and resilience. Specially, representations about the importance of parenthood had a weaker indirect effect (through the impact of infertility on life domains) on life satisfaction in individuals with higher marital satisfaction or resilience. Therefore, the type of infertility-related stress and both marital satisfaction and resilience should be addressed in psychological interventions for women coping with infertility in mainland China.
相似文献Over the past two decades, researchers consistently demonstrated the importance of science teaching approaches and student self-efficacy in influencing their science achievement. These findings have become the foundation of science education reform. However, empirical supports of these relationships are limited to direct relationships and small-scale studies. Therefore, little is known about the mechanism of how teaching approaches and student self-efficacy affect student achievement. In order to fill these gaps, this study used a multilevel structural equation modeling approach to analyze the direct and indirect relationships between teaching approaches, student self-efficacy, and science achievement by using the data of US eighth grade students in the 2011 TIMSS assessment. The results indicated that none of the teaching approaches identified in this study were directly associated with student science achievement, but significant mediation effect was found between generic teaching and student science achievement through student self-efficacy. Implications of these results for US educational system and reform were discussed.
相似文献