全文获取类型
收费全文 | 15550篇 |
免费 | 220篇 |
国内免费 | 119篇 |
专业分类
教育 | 10688篇 |
科学研究 | 2047篇 |
各国文化 | 110篇 |
体育 | 1358篇 |
综合类 | 11篇 |
文化理论 | 122篇 |
信息传播 | 1553篇 |
出版年
2021年 | 109篇 |
2020年 | 212篇 |
2019年 | 314篇 |
2018年 | 433篇 |
2017年 | 381篇 |
2016年 | 386篇 |
2015年 | 243篇 |
2014年 | 319篇 |
2013年 | 2649篇 |
2012年 | 299篇 |
2011年 | 338篇 |
2010年 | 246篇 |
2009年 | 242篇 |
2008年 | 256篇 |
2007年 | 289篇 |
2006年 | 276篇 |
2005年 | 271篇 |
2004年 | 260篇 |
2003年 | 247篇 |
2002年 | 240篇 |
2001年 | 260篇 |
2000年 | 272篇 |
1999年 | 277篇 |
1998年 | 144篇 |
1997年 | 149篇 |
1996年 | 187篇 |
1995年 | 169篇 |
1994年 | 133篇 |
1993年 | 144篇 |
1992年 | 219篇 |
1991年 | 227篇 |
1990年 | 234篇 |
1989年 | 258篇 |
1988年 | 211篇 |
1987年 | 227篇 |
1986年 | 220篇 |
1985年 | 250篇 |
1984年 | 222篇 |
1983年 | 211篇 |
1982年 | 177篇 |
1981年 | 169篇 |
1980年 | 158篇 |
1979年 | 244篇 |
1978年 | 190篇 |
1977年 | 180篇 |
1976年 | 149篇 |
1975年 | 132篇 |
1974年 | 151篇 |
1973年 | 133篇 |
1971年 | 119篇 |
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
951.
This paper reports research that engaged in the evaluation of an intervention programme designed to enhance the employability of a group of unemployed graduates. The evaluation adopted a quasi-experimental intervention research method employing a general self-efficacy scale, which had been validated in prior research. Results revealed that participants displayed higher levels of GSE after engagement in the programme. Results also revealed the effect of ‘behavioural plasticity’ on the intervention experiences of unemployed graduate participants. The findings of this study are discussed in relation to programme design, recruitment and evaluation. 相似文献
952.
953.
Michael R. Ford 《Journal of School Choice》2015,9(4):529-550
The popular narrative of Wisconsin’s collective bargaining battle started out being about money. Should public employees pay more toward their healthcare? Can school districts offset state aid cuts using the additional revenue from employee healthcare contributions? Does collective bargaining have a cost? This article gives an overview of Wisconsin school boards, explains exactly how Act 10 increased their power, demonstrates why and how improved school board governance can have an impact on student achievement, reviews the changes Wisconsin school boards are making because of Act 10, and provides policy recommendations to improve both board governance behaviors, and the quality of policies enacted by school boards in the postcollective bargaining era. 相似文献
954.
955.
956.
Samantha Plate Lisa Yankowitz Leslie Resorla Meghan R. Swanson Shoba Sreenath Meera Annette Estes Natasha Marrus Meredith Cola Victoria Petrulla Aubrey Faggen Juhi Pandey Sarah Paterson John R. Pruett Jr. Heather Hazlett Stephen Dager Tanya St. John Kelly Botteron Lonnie Zwaigenbaum Joseph Piven Robert T. Schultz Julia Parish-Morris IBIS Network 《Child development》2022,93(2):468-483
Infant vocalizations are early-emerging communicative markers shown to be atypical in autism spectrum disorder (ASD), but few longitudinal, prospective studies exist. In this study, 23,850 infant vocalizations from infants at low (LR)- and high (HR)-risk for ASD (HR-ASD = 23, female = 3; HR-Neg = 35, female = 13; LR = 32, female = 10; 80% White; collected from 2007 to 2017 near Philadelphia) were analyzed at 6, 12, and 24 months. At 12 months, HR-ASD infants produced fewer vocalizations than HR-Neg infants. From 6 to 24 months, HR-Neg infants demonstrated steeper vocalization growth compared to HR-ASD and LR infants. Finally, among HR infants, vocalizing at 12 months was associated with language, social phenotype, and diagnosis at age 2. Infant vocalizing is an objective behavioral marker that could facilitate earlier detection of ASD. 相似文献
957.
958.
The implementation of science reform must be viewed as a systems-level problem and not just focus on resources for teachers and students. High-capacity instructional leadership is essential for supporting classroom science instruction. Recent reform efforts include a shift from learning about science facts to figuring out scientific phenomena in which students use science practices as they build and apply disciplinary core ideas. We report findings from a research study on professional development (PD) to support instructional leaders' learning about the science practices. After participating in the PD, the instructional leaders' familiarity with and leadership content knowledge of the science practices significantly improved. Initially, principals used their understandings from other disciplines and content neutral visions of classrooms to make sense of science instruction. For example, they initially used their understandings of models and argument from ELA and math to make sense of science classroom instruction. Furthermore, some principals focused on content neutral strategies, like a clear objective. Over the course of the PD workshops, principals took up the language of the science practices in more nuanced and sophisticated ways. Principals' use of the language of the science practices became more frequent and shifted from identifying or defining them to considering quality and implementation in science classrooms. As we design tools to support science, we need to consider instructional leaders as important stakeholders and develop resources to specifically meet their needs. If the science feels too unfamiliar or intimidating, principals may avoid or reframe science reform efforts. Consequently, it is important to leverage instructional leaders' resources from other disciplines and content neutral strategies as bridges for building understanding in science. We argue that the science practices are one potential lever to engage in this work and shift instructional leaders' understandings of science instruction. 相似文献
959.
960.
Pittman Ramona T. Lindner Amanda L. Zhang Shuai Binks-Cantrell Emily Malatesha Joshi R. 《Reading and writing》2022,35(9):2075-2076
Reading and Writing - 相似文献