全文获取类型
收费全文 | 14835篇 |
免费 | 222篇 |
国内免费 | 22篇 |
专业分类
教育 | 10564篇 |
科学研究 | 1544篇 |
各国文化 | 152篇 |
体育 | 1183篇 |
综合类 | 8篇 |
文化理论 | 101篇 |
信息传播 | 1527篇 |
出版年
2021年 | 154篇 |
2020年 | 214篇 |
2019年 | 314篇 |
2018年 | 418篇 |
2017年 | 410篇 |
2016年 | 403篇 |
2015年 | 267篇 |
2014年 | 362篇 |
2013年 | 2635篇 |
2012年 | 324篇 |
2011年 | 356篇 |
2010年 | 317篇 |
2009年 | 273篇 |
2008年 | 303篇 |
2007年 | 282篇 |
2006年 | 269篇 |
2005年 | 240篇 |
2004年 | 275篇 |
2003年 | 247篇 |
2002年 | 209篇 |
2001年 | 455篇 |
2000年 | 315篇 |
1999年 | 275篇 |
1998年 | 135篇 |
1997年 | 181篇 |
1996年 | 154篇 |
1995年 | 148篇 |
1994年 | 162篇 |
1993年 | 125篇 |
1992年 | 195篇 |
1991年 | 202篇 |
1990年 | 204篇 |
1989年 | 207篇 |
1988年 | 180篇 |
1987年 | 165篇 |
1986年 | 177篇 |
1985年 | 218篇 |
1984年 | 175篇 |
1983年 | 162篇 |
1982年 | 136篇 |
1981年 | 131篇 |
1980年 | 120篇 |
1979年 | 168篇 |
1978年 | 134篇 |
1977年 | 121篇 |
1976年 | 98篇 |
1975年 | 116篇 |
1974年 | 100篇 |
1973年 | 109篇 |
1971年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Control of beak opening (gape) and peck location was examined in pigeons. Feeding pecks showed accurate guidance that positioned the seed between the beaks. At the moment of contact with the seed, gape was proportional to seed diameter, although pecks with gape less than seed diameter were more frequent following an increase in seed size during a meal. There were no substantial differences between pigeons trained to keypeck with autoshaping and those trained with operant conditioning procedures. With either procedure, water reinforcement produced keypecks with the beak closed; seed reinforcers of different sizes produced means for gape proportional to the seed diameters. Black or white circular stimuli of different sizes projected as conditioning signals had little influence upon gape, but a greater percentage of responses was directed to white stimuli. These results indicate that visual stimuli elicit and orient the peck, whereas the adjustment of gape also involves the somatosensory stimuli provided during previous experience with a particular reinforcer or food type. 相似文献
152.
The early stages of empathy in counseling—emotional reaction, role-taking, and cognitive suspension—have all been largely ignored in the counselor education/psychological literature. This article describes these stages from the perspective of the aesthetic/film literatures. Emotional reaction is an internal, unobservable state of being. Role-taking involves cognitive understanding and entering the perceptual world of another. Cognitive suspension means letting go of personal beliefs and values. The film literature describes how audience emotional states are created by directors, writers, actors, and editors. This article explains how counselor educators and supervisors can use this information to help counselors increase their empathic experiences. 相似文献
153.
154.
155.
About 16,000 babies each year will be identified with hearing loss by age 3 months once universal newborn hearing screening becomes a reality. Identification of hearing loss in infancy, followed by appropriate intervention by age 6 months, can result in normal language development, regardless of degree of hearing loss. As the average age of identification of hearing loss moves downward toward 2 months, children with hearing loss will enter the educational system earlier and with language skills commensurate with those of their hearing peers. In order to provide appropriate services to children with hearing loss and their families, early interventionists will need to forge links to health care providers involved in universal newborn hearing screening programs, to have specialized training in deafness and hearing loss, and to have expertise in providing services to very young children and to children with hearing loss in the broad range from mild to profound. 相似文献
156.
157.
Kausalai Wijekumar Bonnie J. F. Meyer Puiwa Lei Anita C. Hernandez Diane L. August 《Reading and writing》2018,31(9):1969-1996
Reading and comprehending content area texts is important for academic and professional success as well as life skills necessary to maintain good health and quality lifestyle. Spanish speaking English language learners have shown poor performance on high-stakes assessments in reading comprehension. The number of Spanish speaking English learners (ELs) in our schools continues to increase at a fast pace, and therefore it is imperative that we address their reading comprehension needs swiftly and effectively. The text structure strategy has shown positive results on comprehension outcomes in many research studies with students at Grades 2, 4, 5, and 7. This study is the first implementation of instruction about the text structure strategy expressly designed to accommodate the linguistic and comprehension needs of Spanish speaking ELs in Grades 4 and 5. Strategy instruction on the web for English learners (SWELL) was designed to deliver instruction about the text structure strategy to Spanish speaker English learners. A randomized controlled study with pre and post-tests was conducted with 14 classrooms at fourth-grade and 17 classrooms at fifth-grade in high poverty schools where over 85% of students were Spanish speaking bilinguals or ELs. Analysis of data using multi-level models show moderate to large-effects favoring the students in the SWELL classrooms over the business as usual control classrooms on important measures such as a standardized reading comprehension test and main idea and cloze tasks. This research has practical implications for the use of web-based tools to provide high-quality and supportive instruction to improve Spanish speaking ELs reading comprehension skills. 相似文献
158.
159.
160.