全文获取类型
收费全文 | 26945篇 |
免费 | 335篇 |
国内免费 | 31篇 |
专业分类
教育 | 18560篇 |
科学研究 | 2701篇 |
各国文化 | 278篇 |
体育 | 2530篇 |
综合类 | 28篇 |
文化理论 | 199篇 |
信息传播 | 3015篇 |
出版年
2021年 | 238篇 |
2020年 | 383篇 |
2019年 | 535篇 |
2018年 | 691篇 |
2017年 | 741篇 |
2016年 | 697篇 |
2015年 | 458篇 |
2014年 | 606篇 |
2013年 | 4798篇 |
2012年 | 554篇 |
2011年 | 606篇 |
2010年 | 509篇 |
2009年 | 483篇 |
2008年 | 526篇 |
2007年 | 482篇 |
2006年 | 464篇 |
2005年 | 420篇 |
2004年 | 688篇 |
2003年 | 546篇 |
2002年 | 542篇 |
2001年 | 667篇 |
2000年 | 519篇 |
1999年 | 430篇 |
1998年 | 214篇 |
1997年 | 269篇 |
1996年 | 278篇 |
1995年 | 251篇 |
1994年 | 268篇 |
1993年 | 228篇 |
1992年 | 345篇 |
1991年 | 353篇 |
1990年 | 344篇 |
1989年 | 394篇 |
1988年 | 331篇 |
1987年 | 353篇 |
1986年 | 330篇 |
1985年 | 418篇 |
1984年 | 334篇 |
1983年 | 307篇 |
1982年 | 271篇 |
1981年 | 243篇 |
1980年 | 212篇 |
1979年 | 317篇 |
1978年 | 258篇 |
1977年 | 230篇 |
1976年 | 219篇 |
1975年 | 205篇 |
1974年 | 209篇 |
1973年 | 191篇 |
1971年 | 196篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
A group of 633 college students at a large midwestern public university was asked fifteen questions pertaining to personal long-term course planning. The results indicated that only 48% of the students sketched out a tentative listing of at least two courses per term for one or more subsequent semesters when first planning courses for the current semester. Long-range planning was positively correlated with the number of years students had already spent in college and with students' perception of the following factors: course planning utility, degree of certainty about pursuing one's current first choice of career, and degree of commitment in using college coursework as a means of achieving a career goal (all p < 0.001). Long-range planning was negatively correlated with the anticipation of a possible change in academic interests. Such planning was not significantly correlated with students' entrance examination aptitude scores or grade point averages. Thus, students' long-range planning of courses was associated more strongly with career commitment than with recent academic performance or aptitude. 相似文献
992.
993.
994.
Salary comparisons: New methods for correcting old fallacies 总被引:1,自引:0,他引:1
Institutions of higher education place high priority on ensuring that their faculties are adequately paid. Since gauging the adequacy of compensation is a problem of relative measure, this assessment is usually performed by comparing university-level average salaries for a group of peer institutions. Often the potential distortions caused by differences in the rank mix of the faculty are forestalled by comparing average salaries for each of the four ranks. However, few if any institutions take similar steps to prevent the skewing of averages owing to differences in cost of living, differences in distribution of faculty in academic year and twelve-month appointments, and differences in the configuration of the faculty over disciplines. This paper shows that salary comparisons that do not compensate for these variation in staff mix are seriously flawed. A recommended methodology is demonstrated. 相似文献
995.
Media and method 总被引:3,自引:0,他引:3
996.
997.
This article focuses on nonsigning hearing parents of deaf children who share the goals of bilingual-bicultural (BiBi) programs for their child, opt for their home language to be their deaf child's first language (L1), and have questions about communication options (e.g., oral methods, manually coded English [MCE] systems, or Cued Speech) for conveying that language. We present research findings related to the effectiveness of MCE systems and Cued Speech for conveying English and developing deaf children's reading abilities. We compare the cueing of English and the signing of MCE systems in terms of theoretical and practical advantages. Finally, we suggest research needs. 相似文献
998.
To investigate the relationship between achievement and IQ in the learning-disabled (LD) population, changes in the IQ scores of LD students from the early elementary grades to the high school grades were studied. The intercorrelations among those IQ scores and a variety of achievement scores were then explored for the purpose of ascertaining causal relationships. The results were interpreted as support for the contention that the underachievement of LD students (in particular, reading underachievement) plays a predominant causal role in the achievement-IQ relationship in this population. 相似文献
999.
1000.
Two studies used a one-trial-a-day aversive conditioning procedure with rats as subjects to investigate the effects of a noise versus a light CS on conditioned freezing. Experiment 1 demonstrated that less conditioned freezing was elicited by the light, although the two CSs led to similar levels of freezing to the contextual cues of the conditioning chamber. Experiment 2 replicated these outcomes and showed that the manipulation of CS intensity produced results similar to those of modality, with the more intense CSs eliciting less freezing. The second experiment also determined that freezing to contextual cues resulted from context conditioning. According to the Rescorla-Wagner model, CSs that condition poorly should generate little competition with context conditioning. Since neither the modality nor intensity factor reliably influenced context conditioning, as measured by context-evoked freezing, the studies provide no support for the view that the effects on CS-evoked freezing represent differences in the strength of conditioning to the various stimuli. This finding raises the possibility that all of the CSs conditioned well but varied in their abilities to elicit freezing because they differed in terms of the form of defensive behavior under their control. 相似文献