全文获取类型
收费全文 | 15050篇 |
免费 | 72篇 |
国内免费 | 60篇 |
专业分类
教育 | 9609篇 |
科学研究 | 1083篇 |
各国文化 | 442篇 |
体育 | 2453篇 |
综合类 | 268篇 |
文化理论 | 105篇 |
信息传播 | 1222篇 |
出版年
2023年 | 125篇 |
2022年 | 143篇 |
2021年 | 112篇 |
2020年 | 84篇 |
2019年 | 74篇 |
2018年 | 62篇 |
2016年 | 91篇 |
2015年 | 241篇 |
2014年 | 576篇 |
2013年 | 675篇 |
2012年 | 691篇 |
2011年 | 1192篇 |
2010年 | 746篇 |
2009年 | 533篇 |
2008年 | 730篇 |
2007年 | 666篇 |
2006年 | 799篇 |
2005年 | 774篇 |
2004年 | 668篇 |
2003年 | 683篇 |
2002年 | 508篇 |
2001年 | 243篇 |
2000年 | 240篇 |
1999年 | 170篇 |
1998年 | 103篇 |
1997年 | 141篇 |
1996年 | 115篇 |
1995年 | 145篇 |
1994年 | 147篇 |
1993年 | 142篇 |
1992年 | 175篇 |
1991年 | 155篇 |
1990年 | 197篇 |
1989年 | 180篇 |
1988年 | 230篇 |
1987年 | 319篇 |
1986年 | 287篇 |
1985年 | 358篇 |
1984年 | 273篇 |
1983年 | 246篇 |
1982年 | 214篇 |
1981年 | 183篇 |
1980年 | 107篇 |
1979年 | 48篇 |
1958年 | 37篇 |
1957年 | 48篇 |
1956年 | 60篇 |
1955年 | 63篇 |
1954年 | 63篇 |
1953年 | 36篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
941.
1939年夏天,爱因斯坦到位于纽约东部的长岛度假.而我的祖父--大卫·罗斯曼,在那里经营着罗斯曼百货公司.6月的一天,爱因斯坦走进店里.尽管祖父一眼就认出了他,但还是把他当作一名普通顾客对待. 相似文献
942.
类萜烯化合物是在许多种香精油,特别是针叶树香精油中所发现的烃类(C_(10)H_1)之一。这里,三位在地理上远隔的实验室中工作的西班牙化学家,完全用技术词汇叙述了他们在转变和合成各种类萜烯化合物方面的工作成果。小的发展中国家的研究小组可以从这篇报道中得到鼓舞。 相似文献
943.
946.
Abrams D 《Child development》2011,82(5):1579-1593
Does children’s bias toward their own groups reflect egocentrism or social understanding? After being categorized as belonging to 1 of 2 fictitious groups, 157 six‐ to ten‐year‐olds evaluated group members and expressed preferences among neutral items. Children who expected the in‐group to share their item preferences (egocentric social projection) showed intergroup bias. However, most bias was expressed by children who expected their in‐group to share, but the out‐group to oppose, their own evaluations of members. These oppositional expectations were associated with better social perspective taking, and better understanding that groups expect loyalty from their members. Consistent with the developmental model of subjective group dynamics (D. Abrams, A. Rutland, J. Pelletier, & J. M. Ferrell, 2009), social understanding, rather than egocentrism, provides a more parsimonious explanation of children’s intergroup bias. 相似文献
947.
Children with learning problems require early intervention. If it is evidence based and implemented with integrity and intensity, it will accelerate the academic progress of many students. This is the hope and expectation of the many supporters of responsiveness-to-intervention (RTI). A minority of children, however, will not respond sufficiently to such intervention because of learning disorders like specific learning disabilities (SLD). Some RTI models do not include research-backed methods to identify these children, nor do RTI practitioners often produce the data necessary to develop individualized instruction for them. The authors suggest practitioners go beyond typical RTI assessment data documenting responsiveness/ unresponsiveness to conduct comprehensive evaluations of these most difficult-to-teach students and to include in their evaluations carefully chosen cognitive measures. This special issue presents the work of teams of researchers, which suggests that cognitive and neuropsychological assessments can provide information to further understand SLD, which in turn can guide development of promising interventions. 相似文献
948.
Objectives
What impact does the strengthening of child rights have on the experience and circumstances of children? CRC General Comment 13 emphasizes that defining measurable targets for improvements in child protection is a key element of efforts to strengthen child rights and well-being across the world. This paper describes an attempt to identify key domains relevant to such mapping of child protection indicators, and the feasibility of collecting data—from existing data sources or otherwise—to complete a “National Child Protection Index Report” summarizing achievements and concerns at a national level.Methods
A process of inter-agency consultation was facilitated by the CPC Learning Network to establish a template for the Index Report. The template was modeled on that used for the “Countdown to 2015” maternal, neonatal and child health initiative, aiming to capture indices not only of key protection risks but also implementation and coverage of key protection measures. The work drew on indicator development and policy initiatives by a number of international child protection agencies. The template developed was used as a basis to pilot national data collection in Indonesia and, at a sub-national level, in northern Uganda.Findings
The template provides a concise summary of protection issues of relevance to a broad range of constituencies, global and national. However, in the pilot settings, existing routine data collection was inadequate to effectively populate a large proportion of indicators. Mechanisms of collating findings from discrete assessments—another potential source of data for completion of the index report—were also generally underdeveloped.Practice implications
In settings where state infrastructure allows the collection and analysis of routine data in such domains as health and economic activity, such efforts should be extended to the child protection sector. Discrete assessments by governmental or non-governmental agencies also provide significant potential for more effective sharing and collation of information. National Child Protection sub-clusters or equivalent structures can play an important role in facilitating both of these processes. 相似文献949.
Objectives
Parental depression symptoms often change over the course of child welfare family preservation and parenting services. This raises the question of whether certain processes in family preservation services might be associated with depression symptom change. This study tests three correlational models of change among family preservation service participants: (a) changes in depression symptoms are one facet of broad general changes in wellbeing; (b) the quality of the home visitor-client relationship is associated depression symptom changes; and (c) linking parents to adjunctive services is associated with symptom changes.Methods
Participants were 2,175 parents in family preservation services, largely for child neglect, who were surveyed using standard measures at pre-treatment, post-treatment and 6 month follow-up. Change patterns were evaluated using growth models, including bivariate parallel and multivariate second-order models.Results
Parallel growth was noted among depression symptoms and changes in social, economic, familial, and parenting domains. A second order change model positing a global change pattern fit the data well. Working alliance had a modest association with improvement, but successful linkage to outside mental health services was not associated with improvement.Conclusions
Changes in diverse indicators of wellbeing follow a global pattern which might support use of less complex rather than more fully comprehensive service plans. Findings about lack of adjunctive usual care mental health service benefit may be related to uncontrolled factors and this is a topic in need of additional study. 相似文献950.