全文获取类型
| 收费全文 | 35279篇 |
| 免费 | 554篇 |
| 国内免费 | 25篇 |
专业分类
| 教育 | 24655篇 |
| 科学研究 | 3193篇 |
| 各国文化 | 363篇 |
| 体育 | 3229篇 |
| 综合类 | 35篇 |
| 文化理论 | 268篇 |
| 信息传播 | 4115篇 |
出版年
| 2022年 | 223篇 |
| 2021年 | 342篇 |
| 2020年 | 556篇 |
| 2019年 | 843篇 |
| 2018年 | 1097篇 |
| 2017年 | 1127篇 |
| 2016年 | 1014篇 |
| 2015年 | 625篇 |
| 2014年 | 921篇 |
| 2013年 | 6754篇 |
| 2012年 | 871篇 |
| 2011年 | 909篇 |
| 2010年 | 692篇 |
| 2009年 | 722篇 |
| 2008年 | 775篇 |
| 2007年 | 696篇 |
| 2006年 | 637篇 |
| 2005年 | 606篇 |
| 2004年 | 812篇 |
| 2003年 | 689篇 |
| 2002年 | 710篇 |
| 2001年 | 664篇 |
| 2000年 | 604篇 |
| 1999年 | 520篇 |
| 1998年 | 289篇 |
| 1997年 | 311篇 |
| 1996年 | 368篇 |
| 1995年 | 362篇 |
| 1994年 | 292篇 |
| 1993年 | 312篇 |
| 1992年 | 470篇 |
| 1991年 | 440篇 |
| 1990年 | 438篇 |
| 1989年 | 479篇 |
| 1988年 | 416篇 |
| 1987年 | 471篇 |
| 1986年 | 410篇 |
| 1985年 | 497篇 |
| 1984年 | 404篇 |
| 1983年 | 369篇 |
| 1982年 | 329篇 |
| 1981年 | 276篇 |
| 1980年 | 251篇 |
| 1979年 | 410篇 |
| 1978年 | 303篇 |
| 1977年 | 274篇 |
| 1976年 | 274篇 |
| 1975年 | 228篇 |
| 1974年 | 251篇 |
| 1971年 | 216篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
141.
142.
143.
144.
145.
146.
147.
148.
This study was designed to examine children's attitudes toward the role of sports in determining social status, as well as the activities in which children prefer to participate. A total of 227 boys and 251 girls in Grades 4, 5, and 6 completed a questionnaire to determine which criteria were most important in determining personal, female, and male popularity. Personal popularity was answered by the girls and boys according to "what would make you well liked by your classmates." Female and male popularity was determined by asking both girls and boys to decide "what would make (girls, for female subjects, and boys, for male subjects) well liked by your classmates." A comparison of results from the Buchanan, Blankenbaker, and Cotten (1976) investigation and the present study indicated that, in the last 15 years, appearance has become more important and academic achievement less important in determining personal popularity for girls. For boys, the comparison revealed that sports have become more important and academic achievement less important in determining personal popularity. Boys reported sports to be the most important determinant of personal and male popularity and appearance as the most important determinant of female popularity. Sports and appearance became more important for boys with each higher grade level. Girls reported appearance to be the most important determinant of personal, male, and female popularity. For girls, appearance became more important with each higher grade level. A comparison of results from the Buchanan et al. (1976) and the present study indicated that the activities in which girls and boys preferred to participate have changed.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
149.
150.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service. 相似文献