全文获取类型
收费全文 | 823篇 |
免费 | 15篇 |
国内免费 | 1篇 |
专业分类
教育 | 696篇 |
科学研究 | 28篇 |
各国文化 | 10篇 |
体育 | 37篇 |
文化理论 | 2篇 |
信息传播 | 66篇 |
出版年
2022年 | 3篇 |
2021年 | 13篇 |
2020年 | 19篇 |
2019年 | 15篇 |
2018年 | 26篇 |
2017年 | 31篇 |
2016年 | 28篇 |
2015年 | 19篇 |
2014年 | 13篇 |
2013年 | 197篇 |
2012年 | 19篇 |
2011年 | 21篇 |
2010年 | 24篇 |
2009年 | 20篇 |
2008年 | 16篇 |
2007年 | 19篇 |
2006年 | 17篇 |
2005年 | 18篇 |
2004年 | 15篇 |
2003年 | 20篇 |
2002年 | 21篇 |
2001年 | 15篇 |
2000年 | 13篇 |
1999年 | 29篇 |
1998年 | 12篇 |
1997年 | 4篇 |
1996年 | 16篇 |
1995年 | 9篇 |
1994年 | 7篇 |
1993年 | 6篇 |
1992年 | 11篇 |
1991年 | 8篇 |
1990年 | 10篇 |
1989年 | 11篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 10篇 |
1985年 | 10篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 9篇 |
1976年 | 7篇 |
1973年 | 7篇 |
1972年 | 3篇 |
1971年 | 4篇 |
1968年 | 5篇 |
1923年 | 3篇 |
排序方式: 共有839条查询结果,搜索用时 15 毫秒
101.
102.
Five rats were exposed to fixed-time food schedules, ranging from 30 to 480 sec. Three rats displayed a postfood pattern of schedule-induced drinking, with short latencies from food delivery to drinking at all interfood interval durations. In contrast, drinking for the other 2 subjects tended to occur at lower overall levels, and drinking bouts frequently began in the middle of the interfood interval, such that the latency from food delivery to drinking increased dramatically as the interfood interval increased. Observation of these 2 subjects revealed that another form of licking-pawgrooming-occurred reliably after food delivery and before drinking bouts. A between subject comparison of the 3 postfood drinkers and the 2 pawgroomers revealed that, in addition to a common topography (repetitive licking), pawgrooming and drinking were similar with respect to their temporal locus, relation to the interfood interval, and extinction baseline levels. These similarities suggest that drinking and pawgrooming are induced by a common mechanism. Cohen, Looney, Campagnoni, and Lawler’s (1985) two-state model of reinforcer-induced motivation provides a useful framework for the interpretation of these results. 相似文献
103.
Walt Karniski M.D. Lynne Van Buren R.N. J.Michael Cupoli M.D. 《Child abuse & neglect》1986,10(4):471-478
Failure to thrive (FTT) is a frequent cause for the admission of infants to the hospital. Such hospitalizations are often lengthy and expensive, and usually do not contribute to an understanding of the etiology of FTT. Generally, organic causes of FTT can be ruled out by a thorough history and physical examination. In this study two groups were examined: 17 infants who were admitted to foster medical placement homes (MPH), private homes with specially trained parents; and a comparison group of 18 infants who were treated in a more traditional way with diagnostic hospitalization. The groups were similar in all regards prior to admission. All infants were less than a year of age. Family disruption was a prominent feature in both groups, but socio-demographic analysis showed them to be similar in all areas studied. The comparison group gained an average of 276 grams in the hospital over 8.6 days. The MPH group gained 362 grams in the hospital over 8.7 days, with an additional 1270 grams in the medical placement home over 31.1 days. Five children were admitted to the medical placement home without hospitalization. After correcting for an expected weight gain of 15 grams per day (normal growth), the comparison group showed a catch-up growth of 16 gms/day, while the MPH group gained 29 gms/day in excess of expectation, almost twice the comparison group. A 100-gram weight gain cost +308 in the MPH program and +1,635 in the traditional approach. This five-fold difference was felt to be a significant deterrent to the continuing approach of admitting children to the hospital for for the workup of FTT.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
104.
Philip H. K. Seymour Lynne G. Duncan Fiona M. Bolik 《Journal of Research in Reading》1999,22(2):113-130
Theorists and practitioners in the field of reading development are currently debating the importance of rhymes and phonemes in beginning reading. In a recent study, Duncan, Seymour and Hill (1997) provided evidence that explicit or meta- awareness of sound is closely linked to reading strategy. Meta-awareness was measured by asking beginning readers to identify the ‘common unit’ shared by two spoken words. Results showed that meta-awareness of phonemes emerged prior to meta-awareness of rhyme, and that reading strategy followed a similar small-to-large progression. This study reports on a replication of the ‘common unit’ task which includes modifications to the original procedure (randomisation of conditions, increased practice, removal of positional references from instructions). The results confirm the pattern observed in the original study. Beginning readers learning by a mixed method can identify shared phonemes but not shared rimes in the common unit task. The implications of this and similar replications are discussed. 相似文献
105.
Districts are increasingly making personnel decisions based on teachers’ impact on student-achievement gains and classroom observations. In some schools, however, a teacher’s practices and their students’ achievement may reflect not just individual but collaborative efforts. In other settings, teachers’ instruction benefits less from the insights and support of their colleagues. This article analyzes multiple measures of teacher and teaching quality for 24 language arts teachers in New York City who teach in different types of school environments. Teachers in different value-added quartiles were observed and scored using two protocols, PLATO and CLASS. Schools were categorized as more and less functional using Department of Education environment grades. To compare the practices of higher and lower value-added teachers in more and less functional schools, we conduct MANOVAs of observation scores and use qualitative coding of field notes. We find value-added measures and observation protocols provide confirmatory information in less functional schools but provide contradictory information about teacher quality in more functional schools. Implications for teacher education, policy, and future research are discussed. 相似文献
106.
107.
Educating students with mild disabilities in general education classrooms: Minnesota alternatives 总被引:1,自引:0,他引:1
This article reports two major data collection efforts conducted during successive years. Study 1 examined the relationship between the school effectiveness variables identified in the Minnesota Educational Effectiveness Project (MEEP), and the attitudes and achievement of students in 31 MEEP schools. Study 2, which focused on 11 of the Study 1 schools, compared the instructional programs provided to students with mild disabilities in three integrated programs in these 11 schools, with those provided by conventional resource "pull-out" programs in three other schools. We not only contrasted program characteristics, but analyzed differences between program characteristics and cognitive and affective outcomes. Results do not provide a strong basis for concluding that general efforts at school improvement will provide the framework for improved outcomes among low-achieving students. 相似文献
108.
Alastair S MacDonald Lynne ONeil 《The International Journal of Art & Design Education》1997,16(1):25-34
The paper discusses the long-term strategic approach to collaboration between education and industry initiated by Glasgow School of Art's Department of Product Design, and examines the opportunities and benefits of the investment in the post of an Industrial Liaison Officer (ILO) over a four year period which furthered this partnership. The paper shows the need for a professionally and adequately resourced approach to provide mutual benefits to industry and education, and to the economy in general 相似文献
109.
110.
Six water-deprived pigeons were exposed to a fixed-time 90-sec water schedule with and without a conspecific target available. Target contacts and the pigeon’s location in the test chamber during the interreinforcement interval were recorded, and the results were compared with those previously obtained with food reinforcement. Prior to target introduction, water-reinforced birds spent more total time in the front near the reinforcer dispenser and less in the rear than food-reinforced birds and, unlike food-reinforced birds, exhibited postreinforcement drinking-like behaviors near the reinforcer dispenser before moving away from that area. With the target available, the level, topography, and duration of target-directed biting pecks were comparable for food- and water-reinforced pigeons. In contrast, the temporal organization of target pecks reflected the different temporal and spatial organizations of behavior prior to target introduction. For both food- and water-reinforced birds, the time between reinforcers at which a bird was spatially situated halfway between the front and rear of the chamber prior to target presentation was positively correlated with the time at which maximum target contact subsequently occurred. 相似文献