首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1991篇
  免费   80篇
  国内免费   41篇
  2112篇
  2024年   18篇
  2023年   34篇
  2022年   33篇
  2021年   43篇
  2020年   68篇
  2019年   68篇
  2018年   94篇
  2017年   104篇
  2016年   70篇
  2015年   71篇
  2014年   71篇
  2013年   216篇
  2012年   158篇
  2011年   168篇
  2010年   122篇
  2009年   52篇
  2008年   139篇
  2007年   112篇
  2006年   115篇
  2005年   53篇
  2004年   49篇
  2003年   36篇
  2002年   33篇
  2001年   14篇
  2000年   22篇
  1999年   13篇
  1998年   15篇
  1997年   8篇
  1996年   6篇
  1995年   7篇
  1994年   11篇
  1993年   11篇
  1992年   8篇
  1991年   3篇
  1990年   4篇
  1989年   11篇
  1988年   3篇
  1987年   3篇
  1986年   4篇
  1985年   5篇
  1984年   5篇
  1983年   2篇
  1982年   3篇
  1981年   4篇
  1979年   2篇
  1974年   5篇
  1970年   4篇
  1968年   3篇
  1965年   1篇
  1956年   2篇
排序方式: 共有2112条查询结果,搜索用时 15 毫秒
61.
A simple method was designed to evaluate visual abilities such as disance visual acuity, binocular horizontal visual field, simple and choice visual reaction times, and stereoscopic vision in skilled 11- to 13-yr.-old basketball players participating in a 15-day summer training camp. On a test battery, visual abilities were monitored in 473 players of the Spanish Basketball Federation over a 5-yr. period. The players showed outstanding scores on distance visual acuity and stereoscopic vision, and good visual reaction times and horizontal visual fields. When scores were compared by sex and age, significant differences on certain visual measures were observed. Many layers showed crossed eye-hand dominance. Visual screening programs may help promote visual health among junior basketball players and could be used for performance training.  相似文献   
62.
Garcia, J. The Logic and Limits of Mental Aptitude Testing. American Psychologist, 1981, 36, 1172–1180. Hargadon, F. Tests and College Admissions. American Psychologist, 1981, 36, 1112–1119.  相似文献   
63.
采用S-P法检测17例HT患者甲状腺组织切除标本和9例正常甲状腺组织标本中ES、iNOS及bFGF的表达并分析其之间的相关性,以探讨三者在HT发生发展中的作用.结果HT组中ES、iNOS及bFGF的表达程度均明显高于正常组(P均<0.05),其中ES与bFGF表达无显著相关性(P>0.05),ES与iNOS、bFGF与iNOS的表达均呈显著正相关(r=0.531,r=0.723,P均<0.05).结论为在HT中,高表达的ES、iNOS及bFGF在其发生和发展中可能具有重要作用,为研究其病理生理变化和发病机理提供了理论依据.  相似文献   
64.
Five hundred and thirty-one nurses completed a questionnaire assessing knowledge about the flu and flu vaccination, professional group identification, perception of the flu vaccination as a professional duty, previous year's vaccination status, intention to receive vaccination in the following year, and the extent to which motivation to accept vaccination is primarily for self-protection or for patient protection. Results showed that knowledge about the flu and flu vaccination constitutes a major reason for rejecting immunisation. Group identification also constitutes an independent predictor of vaccination. Furthermore, the effect of identification on willingness to receive the vaccination was partially mediated by perceived professional responsibility: the more nurses identified with their group, the more they perceived vaccination as a professional duty and, as a consequence, the more likely that they (a) had been vaccinated the previous year, (b) intended to be vaccinated in the following year, and (c) were motivated to be vaccinated for patient protection (but not for self-protection).  相似文献   
65.
66.
采用S-P法检测17例HT患者甲状腺组织切除标本和9例正常甲状腺组织标本中ES、iNOS及bFGF的表达并分析其之间的相关性,以探讨三者在HT发生发展中的作用。结果HT组中ES、iNOS及bFGF的表达程度均明显高于正常组(P均〈0.05),其中ES与bFGF表达无显著相关性(P〉0.05),ES与iNOS、bFGF与iNOS的表达均呈显著正相关(r=0.531,r=0.723,P均〈0.05)。结论为在HT中,高表达的ES、iNOS及bFGF在其发生和发展中可能具有重要作用,为研究其病理生理变化和发病机理提供了理论依据。  相似文献   
67.
We studied the efficacy and implementation outcomes of a culturally responsive parent training (PT) program. Fifty-four Chinese American parents participated in a wait-list controlled group randomized trial (32 immediate treatment, 22 delayed treatment) of a 14-week intervention designed to address the needs of high-risk immigrant families. Parents were eligible for intervention if they were Chinese-speaking immigrants referred from schools, community clinics, or child protective services with concerns about parenting or child behavior problems. Retention and engagement were high with 83% of families attending 10 or more sessions. Results revealed that the treatment was efficacious in reducing negative discipline, increasing positive parenting, and decreasing child externalizing and internalizing problems. Treatment effects were larger among families with higher levels of baseline behavior problems and lower levels of parenting stress. Further augmentation of PT to address immigrant parent stress may be warranted. Qualitative impressions from group leaders suggested that slower pacing and increased rehearsal of skills may improve efficacy for immigrant parents unfamiliar with skills introduced in PT.  相似文献   
68.
The two most used instruments to assess masculinity (M) and femininity (F) are the Bem Sex Role Inventory (BSRI) and the Personality Attributes Questionnaire (PAQ). Two hypotheses will be tested: a) multidimensionality versus bidimensionality, and b) to what extent the two instruments, elaborated to measure the same constructs, classify subjects in the same way. Participants were 420 high school students, 198 women and 222 men, aged 12-15 years. Exploratory factor analysis and internal consistency analysis were carried out and log-linear models were tested. The data support a) the multidimensionality of both instruments and b) the lack of full concordance in the classification of persons according to the fourfold typology. Implications of the results are discussed regarding the supposed theory behind instrumentality/ expressiveness and masculinity/femininity, as well as for the use of both instruments to classify different subjects into the four distinct types.  相似文献   
69.
This work presents an analysis of the role of animacy in attachment preferences of relative clauses to complex noun phrases in European Portuguese (EP). The study of how the human parser solves this kind of syntactic ambiguities has been focus of extensive research. However, what is known about EP is both limited and puzzling. Additionally, as recent studies have stressed the importance of extra-syntactic variables in this process, two experiments were carried out to assess EP attachment preferences considering four animacy conditions: Study 1 used a sentence-completion-task, and Study 2 a self-paced reading task. Both studies indicate a significant preference for high attachment in EP. Furthermore, they showed that this preference was modulated by the animacy of the host NP: if the first host was inanimate and the second one was animate, the parser's preference changed to low attachment preference. These findings shed light on previous results regarding EP and strengthen the idea that, even in early stages of processing, the parser seems to be sensitive to extra-syntactic information.  相似文献   
70.
The purpose of this study was to examine the effectiveness of second tier intervention at-risk readers within the context of a Response to Intervention approach. The study was conducted in the Canary Islands (Spain), directed by research team ¨Dificultades de Aprendizaje, Psicolingüística y Nuevas Tecnologías¨ (DEA&NT) from University of La Laguna, and supported by the Government of the Canary Islands. A sample of 1.123 Spanish children from fourteen schools districts were given the Spanish adaptation of The Hong Kong Specific Learning Difficulties Behavior Checklist and children who scored at or above the 75th percentile on the test were classified as "at risk" for early reading difficulties. Half of the students were randomly assigned to a project-based intervention condition where they received small group supplementary intervention for 30 minutes daily using the Prevención de las Dificultades Específicas de Aprendizaje (PREDEA) curriculum from mid to late December and continued until mid June. The other half received whatever remedial services were available at their schools. Results indicated that children who received the PREDEA curriculum had higher scores on the Early Grade Reading Assessment Test (EGRA) on initial sound identification, listening comprehension, letter sound knowledge and oral reading fluency compared to the control group.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号