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   26293篇
  免费   390篇
  国内免费   35篇
教育   19157篇
科学研究   2186篇
各国文化   278篇
体育   1949篇
综合类   35篇
文化理论   243篇
信息传播   2870篇
  2022年   144篇
  2021年   253篇
  2020年   404篇
  2019年   568篇
  2018年   783篇
  2017年   879篇
  2016年   798篇
  2015年   506篇
  2014年   661篇
  2013年   5176篇
  2012年   622篇
  2011年   713篇
  2010年   547篇
  2009年   542篇
  2008年   613篇
  2007年   584篇
  2006年   531篇
  2005年   467篇
  2004年   440篇
  2003年   413篇
  2002年   448篇
  2001年   485篇
  2000年   460篇
  1999年   459篇
  1998年   262篇
  1997年   285篇
  1996年   309篇
  1995年   269篇
  1994年   256篇
  1993年   241篇
  1992年   344篇
  1991年   351篇
  1990年   374篇
  1989年   359篇
  1988年   330篇
  1987年   286篇
  1986年   297篇
  1985年   371篇
  1984年   296篇
  1983年   282篇
  1982年   231篇
  1981年   245篇
  1980年   205篇
  1979年   299篇
  1978年   239篇
  1977年   237篇
  1976年   190篇
  1975年   156篇
  1974年   154篇
  1973年   169篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Education reform towards a whole school approach to catering for diversity within Hong Kong government schools has seen the initiation of several strategies to support mainstream schools in this transition. One of these approaches is the use of a resource school model. Special and mainstream schools in Hong Kong are being invited to establish themselves as resource support hubs for partner mainstream schools. This paper investigates how this model is being implemented by considering one of each type of resource school. Three broad themes have emerged that relate to the type of support being offered and sought: the school ethos and culture of the partner schools; and management issues. The effectiveness of a resource model is evaluated for its use in Hong Kong.  相似文献   
102.
Abstract: The current generation of students coming into food science and engineering programs is very visually oriented from their early experiences. To increase their interest in learning, new and visually appealing teaching materials need to be developed. Two diverse groups of students may be identified based on their math skills. Food science students tend to find it difficult to use mathematics as a problem‐solving tool for food engineering problems. Food engineering students, on the other hand, should be challenged to use emerging mathematical tools to develop their problem‐solving skills. Therefore, the approach of this project involved the development of a curriculum to train undergraduate food engineers in the effective use of computational fluid dynamics (CFD) software to solve food engineering problems by engaging them in the creation of food engineering teaching tools. These CFD outputs were then used as innovative teaching tools for the food science students. In this paper, this concept will be illustrated by unsteady‐state heat transfer and fluid flow problems. To evaluate the efficiency of the teaching materials developed, a student focus group was asked to answer the same quiz following a conventional and CFD output aided teaching session. The assessment result showed an improved understanding of the subject after the CFD teaching session. These visual aids were excellent tools to illustrate the validity of the formulas presented in class. In addition, the new visual materials enabled a better understanding of the relationships among different process parameters. In general, this helped the food science students better appreciate the food engineering concepts that govern food processing operations.  相似文献   
103.
In recent decades, increasing numbers of studies have focused on metacomprehension accuracy, or readers’ ability to distinguish between texts comprehended more vs. less well. Following early findings that suggested readers are fairly poor at doing so, a number of studies have identified specific tasks to supplement a single reading of text that have resulted in greater metacomprehension accuracy. One assumption underlying these studies is that, in the absence of such tasks, metacomprehension accuracy is uniformly poor, and given their implementation, readers uniformly improve. Here we describe the individual variation that occurs both in the absence (e.g., within a single text reading manipulation) and presence (e.g., within a rereading or selective rereading task manipulation) of these supplementary tasks (N = 214), in order to make a case for greater attention to individual differences in metacomprehension accuracy. We also introduce a new manipulation in metacomprehension research, selective rereading, and argue that certain types of tasks may be more likely to reveal individual differences in metacomprehension accuracy due to the nature of the task being more or less demanding on working memory capacity.  相似文献   
104.
Through seminars and continuing educational opportunities, recently certified Lamaze childbirth educators beginning their teaching careers have learned of the changes in birth practices over the past 50 years. However, they may not have heard the personal stories about the locations and conditions in which Lamaze educators first taught. In this column, five childbirth educators share their memories of the birthing climate, teaching strategies, class populations, and other aspects of Lamaze childbirth education 50 years ago and how the old ways compare with today's classes. Their stories not only provide an important, historical perspective to build on the past and improve future educational opportunities for expectant women and their families but also illustrate Lamaze's ongoing efforts to promote natural, safe, and healthy birth practices.  相似文献   
105.
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   
106.
Collective efficacy is an important determinant of the motivation of individuals within groups, with increases in collective efficacy producing more effort in a task and greater persistence when faced with failure. To test hypotheses concerning the impact of collective efficacy on effort and persistence, participants (n = 22) were assigned to triads (consisting of the participant and two confederates) and performed three time trials on cycle ergometers. After trial 1, the participants were assigned to either a high or low collective efficacy condition, receiving appropriate bogus performance feedback. All groups received failure feedback after trial 2. Effort was assessed by performance time and maximum heart rate (HRmax) achieved during performance. A 2 (collective efficacy condition) x 3 (trials) analysis of variance with repeated measures on trials revealed significant interaction effects for both performance time and HRmax. Fisher's least significant difference post-hoc tests indicated that, following efficacy manipulation, groups low in collective efficacy significantly reduced both their performance time and HRmax, whereas groups high in collective efficacy maintained performance and HRmax. However, predictions concerning the impact of failure on persistence were not supported. Our results provide partial support for the role of collective efficacy in team sports.  相似文献   
107.
The purpose of this study was to test the validity of the games for understanding model by comparing it to a technique approach to instruction and a control group. The technique method focused primarily on skill instruction where the skill taught initially was incorporated into a game at the end of each lesson. The games for understanding approach emphasized developing tactical awareness and decision making in small game situations. Two physical education specialists taught field hockey using these approaches for 15 lessons (45 min each). The control group did not receive any field hockey instruction. Data were collected from 71 middle school children. Pretests and posttests were administered for hockey knowledge, skill, and game performance. Separate analyses of variance or analyses of covariance were conducted to examine group differences for cognitive and skill outcomes. The games for understanding group scored significantly higher on passing decision making than the technique and control groups during posttest game play and significantly higher than the control group for declarative and procedural knowledge. The games for understanding group scored significantly higher on control and passing execution than the other groups during posttest game play. For hockey skill, there were no significant differences among the treatment groups for accuracy, but the technique group recorded faster times than the control group on the posttest.  相似文献   
108.
Five women and 5 men were studied to examine the effects of submaximal exercise on thermoregulatory and hemodynamic variables during recovery in two environments: (a) control (C), 22 degrees C, 33% rh; and (b) hot humid (H), 32 degrees C. The participants exercised on a cycle ergometer at 60% of peak oxygen consumption for 35 min prior to 90 min of seated recovery. Sessions were identical, except for environment. Variables evaluated (p < .05) were: core temperature (TR), mean skin temperature (Ts), sweat rate (SR), heart rate (HR), stroke index (SI), cardiac index (CI), forearm blood flow (FBF), systolic blood pressure (SBP), and diastolic blood pressure (DBP). Men and women exhibited similar patterns of TR, Ts, and SR in both environments. Ts and SR (collapsed means for gender) were higher in the H than in the C. DBP was higher in men than in women throughout recovery in both environments. With combined means for gender, HR was higher in the H than in the C. CI, SI, FBF, and SBP were similar in both environments and returned to baseline within 15 min into recovery. These data suggest that heat dissipation during extended recovery was accomplished with similar contributions of cutaneous vasodilation and sweating in M and F. Furthermore, the moderate exercise level did not influence hemodynamics beyond 15 min of recovery in either environment.  相似文献   
109.
110.
Project GRAD (Graduate Ready for Activity Daily) evaluates a university course to promote physical activity. In a randomized study, 338 university seniors participated in either an intervention or control course for academic credit, and posttest data were collected on 321. The control course was knowledge-oriented. The intervention course taught behavior change skills in weekly lectures and peer-led labs. Physical activity was assessed with 7-Day Physical Activity Recall interviews. The intervention had no significant effects on men. Among women, the intervention increased total physical activity during leisure, strengthening exercises, and flexibility exercise. This university course had the intended effects of promoting healthful patterns of physical activity among women, but no effects were observed on men, who were more active than women at baseline.  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