全文获取类型
收费全文 | 38047篇 |
免费 | 547篇 |
国内免费 | 54篇 |
专业分类
教育 | 26695篇 |
科学研究 | 4291篇 |
各国文化 | 390篇 |
体育 | 2817篇 |
综合类 | 39篇 |
文化理论 | 313篇 |
信息传播 | 4103篇 |
出版年
2021年 | 350篇 |
2020年 | 562篇 |
2019年 | 830篇 |
2018年 | 1082篇 |
2017年 | 1162篇 |
2016年 | 1065篇 |
2015年 | 666篇 |
2014年 | 891篇 |
2013年 | 7460篇 |
2012年 | 860篇 |
2011年 | 925篇 |
2010年 | 754篇 |
2009年 | 726篇 |
2008年 | 807篇 |
2007年 | 784篇 |
2006年 | 668篇 |
2005年 | 634篇 |
2004年 | 588篇 |
2003年 | 542篇 |
2002年 | 594篇 |
2001年 | 643篇 |
2000年 | 641篇 |
1999年 | 610篇 |
1998年 | 337篇 |
1997年 | 366篇 |
1996年 | 413篇 |
1995年 | 345篇 |
1994年 | 360篇 |
1993年 | 342篇 |
1992年 | 490篇 |
1991年 | 513篇 |
1990年 | 514篇 |
1989年 | 517篇 |
1988年 | 437篇 |
1987年 | 415篇 |
1986年 | 441篇 |
1985年 | 521篇 |
1984年 | 438篇 |
1983年 | 422篇 |
1982年 | 356篇 |
1981年 | 342篇 |
1980年 | 316篇 |
1979年 | 425篇 |
1978年 | 388篇 |
1977年 | 333篇 |
1976年 | 289篇 |
1975年 | 227篇 |
1974年 | 243篇 |
1973年 | 256篇 |
1971年 | 226篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
This paper analyzes the effects that the 2012 VAT rise in Spain had on household’ demand for cultural goods and services. Household’ demands are modeled as a two-stage QUAIDS. After estimating price and expenditure elasticities, and the pass-through parameter associated with the reform, our results show that the individual welfare loss and the increment in the tax bill increase, but less than proportionately, with income. Consequently, the reform can be considered as regressive. Relating the effects of the VAT reform to households’ incomes also implies a low quantitative effect, because of the low proportion of total household expenditure that cultural expenditure represents. From a social perspective, the size of the induced welfare loss would positively depend on society’s inequality aversion. Regardless of the latter, it cannot be concluded whether the reform would have increased or reduced inequality in the distribution of cultural spending. Our results prove qualitatively robust to alternative values of the pass-through parameter. 相似文献
972.
973.
A series of item analyses of the CAK-C was conducted for a sample of 155 educable mentally retarded children. The probability of a correct response was found to differ from task to task, and there was evidence that the order of difficulty of the tasks for this sample resembled that for nonretarded children. The probabilities of the two incorrect responses were generally not equal, and the choice of one or the other incorrect response showed some relation to CA, MA, and IQ, particularly the last two variables. 相似文献
974.
Three wishes and primary wishes of fourth- through seventh-grade gifted students participating in a residential program for the gifted were collected and categorized. The results indicated that males wished for material things more often than did females. With the exception of fourth graders, subjects made altruistic wishes more frequently than any other wish. 相似文献
975.
Continuing professional education has become increasingly important over the past several years. Recognizing that school psychologists need to update skills on a regular basis, professional organizations in school psychology have developed programs for continuing education. While the interest to participate in such programs seems high, possible conflicts with the requirements of state departments of education may prevent such programs from achieving their potential for success. A survey was conducted to determine present standards for continuing education of school psychologists among state departments of education. The results of this survey are discussed and recommendations are offered to local and state school psychology organizations. 相似文献
976.
A set of behavioral procedures focusing on the academic and social behavior problems of a group of adolescent students was incorporated within the context of a regular school program. The procedures, which involved manipulating type and delay of reinforcement, teaching desirable behaviors that were self-reinforcing or that others would readily reinforce, and training in several skills that are prerequisite to selfcontrol, were implemented in several classrooms through an independent grouporiented contingency system. These students performed significantly better than a matched control group with respect to grade-point average, class grades, school attendance, and length of time absent due to suspension. Changes in the contingency system throughout the year yielded differential effects on three behavioral measures: class attendance, assignments completed, and classroom behavior. The significance of these findings is discussed, and suggestions are made for future research efforts. 相似文献
977.
Charles A. Maher 《Psychology in the schools》1981,18(4):471-474
Effects of involving conduct problem adolescents in goal setting were assessed. Two levels of goal setting were compared: Level 1—pupils were involved with a school counselor in goal setting as a basis for individual behavioral counseling intervention; Level 2—pupils were informed by a counselor that goals were being set, but were not involved in the goal-setting process. Four public school counselors and 16 adolescents were randomly assigned to one of the two conditions, with individual behavioral counseling being provided during a 10-week period. Results indicated greater degree of goal attainment and satisfaction with counseling for pupils who participated in goal setting. 相似文献
978.
979.
This study used a multivariate approach and longitudinal design to examine the relationship of early perceptual and cognitive development to later school achievement. The extent to which a set of 4th-grade achievement measures could be predicted from a set of variables collected when the students were in first grade was determined through a series of canonical and multiple correlation analyses. These results were compared to results of an earlier phase of the study. Similarities between the two phases indicated that: (a) A measure of visual perception added significantly to the prediction of achievement afforded by consideration of sex and academic aptitude. (b) The variables used to predict achievement may differ somewhat between boys and girls. (c) The usefulness of sex as a predictor of school achievement depends upon the specific achievement area under consideration. Differences in the two phases involved the extent to which sex was a predictor of a specific achievement area. 相似文献
980.
The aim of the present study was to develop a system of tables to facilitate interpretation of the McCarthy Scales of Children's Abilities. Tables are presented that organize the McCarthy subtests according to Bannatyne's, Sattler's, and Meeker's systems of interpretation. In addition, tables that organize the McCarthy Scales into categories that reflect factors likely to influence various subtests are presented. These tables will provide a more structured approach to McCarthy interpretation and a straightforward empirical method for generating hypotheses regarding individual strengths and weaknesses in intellectual ability. 相似文献