全文获取类型
收费全文 | 4757篇 |
免费 | 39篇 |
国内免费 | 38篇 |
专业分类
教育 | 2603篇 |
科学研究 | 679篇 |
各国文化 | 15篇 |
体育 | 1008篇 |
综合类 | 36篇 |
文化理论 | 15篇 |
信息传播 | 478篇 |
出版年
2024年 | 15篇 |
2023年 | 12篇 |
2022年 | 29篇 |
2021年 | 8篇 |
2020年 | 12篇 |
2019年 | 9篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 37篇 |
2013年 | 37篇 |
2012年 | 296篇 |
2011年 | 466篇 |
2010年 | 174篇 |
2009年 | 53篇 |
2008年 | 287篇 |
2007年 | 293篇 |
2006年 | 350篇 |
2005年 | 332篇 |
2004年 | 276篇 |
2003年 | 242篇 |
2002年 | 231篇 |
2001年 | 202篇 |
2000年 | 176篇 |
1999年 | 130篇 |
1998年 | 36篇 |
1997年 | 54篇 |
1996年 | 38篇 |
1995年 | 37篇 |
1994年 | 45篇 |
1993年 | 66篇 |
1992年 | 57篇 |
1991年 | 63篇 |
1990年 | 59篇 |
1989年 | 78篇 |
1988年 | 35篇 |
1987年 | 65篇 |
1986年 | 59篇 |
1985年 | 54篇 |
1984年 | 37篇 |
1983年 | 47篇 |
1982年 | 48篇 |
1981年 | 34篇 |
1980年 | 17篇 |
1979年 | 13篇 |
1959年 | 12篇 |
1958年 | 12篇 |
1957年 | 13篇 |
1956年 | 12篇 |
1955年 | 12篇 |
1954年 | 13篇 |
排序方式: 共有4834条查询结果,搜索用时 0 毫秒
51.
We review a series of studies that evaluate the role of developing language skills as a prerequisite to spontaneous rehearsal use in deaf populations. We propose a theoretical model that summarizes the contribution of language skills by highlighting the interrelations among age, language proficiency, and automatized language skills. In an initial test of the model, an index of deaf children's language experience was found to be an almost complete mediator of strategy use. Increasing language proficiency, therefore, was implicated as a critical variable in predicting children's spontaneous rehearsal use, minimizing any direct contribution from age per se. In a more direct assessment of the link between general language proficiency and rehearsal use, pragmatic language skills (as measured by the Language Proficiency Profile: LPP-I) were found to be a nearly complete mediator of rehearsal use, with the remaining contributions of age and language experience being nonsignificant. Language proficiency, therefore, was identified as a strong and necessary prerequisite for rehearsal to be used spontaneously as a memory strategy. The additional hypothesis that the automatization of these general language skills, measured by a rapid automatized naming task (RAN), contributes to spontaneous rehearsal was also evaluated. Automatized language emerged as a partial mediator of the language proficiency → rehearsal use relation but additional language-processing variables were implicated. We discuss these findings as they relate to issues around the nature of language proficiency and the identification of those automatized language skills involved in rehearsal. 相似文献
52.
53.
Zhang XW Yang YP Xu XM Hu TP Gao ZH Zhang J Chen TY Chen ZW 《Journal of Zhejiang University. Science. B》2005,6(4):272-279
INTRODUCTION Human limbs are complex, delicate systems.Their reconstruction, both for appearance and forfunction compensations, proves to be complicatedprojects. With the development of science and tech-nology, both researchers and disabilities hope to haveartificial limb much more perky, comfortable, dex-terous and effective. Although thousands of pros-thetic limbs are commercially available worldwide,most of them, from mechanical styles to electricstyles, from motion controlled t… 相似文献
54.
北太平洋巨型章鱼是170余种巨型章鱼中的一种。人们曾经误把它们看成为海怪,实际上,它们性格平和,并不像古老传说描述的那样会攻击船只。 相似文献
55.
56.
Hirschenfang J 《The Journal of perinatal education》2011,20(2):70-75
In this birth story, a young mother relates her experience of moving beyond fear of labor and birth and developing confidence in her ability to give birth without an epidural. Knowledge and support, including the support of a doula, during the last months of pregnancy helped this mother change her plans for the labor and birth. This story highlights the importance of continuous emotional and physical support and how knowledge and confidence set the stage for a satisfying, safe, and healthy birth. 相似文献
57.
Radio is migrating to digital transmission, expanding its offerings to include captioning for individuals with hearing loss. Text display radio requires a large amount of word throughput with minimal screen display area, making good user interface design crucial to its success. In two experiments, we presented hearing, hard-of-hearing, and deaf consumers with National Public Radio stories converted to text and examined their preferences for and reactions to midsized and small radio text displays. We focused on physical display attributes such as text color, font style, line length, and scrolling type as well as emergency alert messages and emergency prompts for drivers, announcer identification schemes, and synchronization of audio and text. Results suggest that midsized, Global Positioning System (GPS)-style displays were well liked, synchronization of audio and text was important to comprehension and retrieval of story details, identification of announcers was served best with a combination of name change in parenthesis and color change, and a mixture of color and flashing symbols was preferred for emergency alerting. 相似文献
58.
In this article, we discuss the intuitive knowledge mothers have of their unborn baby. We propose a shift in focus from caregivers' merely providing information to first listening to pregnant mothers as they share their intuitive knowledge of their baby. This approach enables mothers and fathers or partners to know they are already parents to their unborn baby and empowers them to get in touch with their baby's presence and who he or she is during pregnancy. This intuitive knowledge may be a protective behavior that will enable mothers to keep babies safe during pregnancy. 相似文献
59.
60.
SHENGPing-xing 《上海大学学报(英文版)》2001,5(2):96-103
This paper deals with Hilbert‘s 16th problem and its generalizations.The configurations of all closed branches of an algebraic curve of degreee n are discussed.The maximum number of sheets for an algebraic equation of degree n and the maximum number of limit cycles for a planar algebraic autonomous system are achieved.The author also considers different generalizations and some related problems. 相似文献