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   13828篇
  免费   209篇
  国内免费   21篇
教育   9649篇
科学研究   1544篇
各国文化   131篇
体育   1166篇
综合类   6篇
文化理论   100篇
信息传播   1462篇
  2021年   140篇
  2020年   205篇
  2019年   280篇
  2018年   387篇
  2017年   375篇
  2016年   376篇
  2015年   246篇
  2014年   321篇
  2013年   2390篇
  2012年   301篇
  2011年   329篇
  2010年   286篇
  2009年   228篇
  2008年   273篇
  2007年   242篇
  2006年   237篇
  2005年   213篇
  2004年   236篇
  2003年   209篇
  2002年   183篇
  2001年   451篇
  2000年   299篇
  1999年   257篇
  1998年   120篇
  1997年   159篇
  1996年   143篇
  1995年   135篇
  1994年   158篇
  1993年   124篇
  1992年   190篇
  1991年   199篇
  1990年   194篇
  1989年   201篇
  1988年   168篇
  1987年   162篇
  1986年   169篇
  1985年   206篇
  1984年   165篇
  1983年   150篇
  1982年   131篇
  1981年   123篇
  1980年   119篇
  1979年   171篇
  1978年   132篇
  1977年   118篇
  1976年   94篇
  1975年   113篇
  1974年   101篇
  1973年   108篇
  1971年   100篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
The political uncertainties surrounding Hong Kong's future as a British Crown Colony have not inhibited either the Hong Kong Government or its particular version of a University Grants Committee (UGC) system from devising and planning a continuing expansion of higher education at a time when most other countries are levelling off or contracting their own.This article deals with the many unique features of the Hong Kong situation of which perhaps the most important is the nature of the Hong Kong Government - traditionally colonial and potentially authoritarian, not elected yet highly sensitive to Chinese opinion both internally and externally, and highly efficient in most of its management activities in spite of a strongly laisser faire tradition.The Hong Kong UGC system is charged with much wider planning functions throughout higher education than elsewhere and is responsible for the polytechnic as well as the two universities - hence its trans-binary designation as the University and Polytechnic Grants Committee. While this has helped its overall planning and academic guidance roles, it has involved it in severe difficulties in relation to its basic financial role which requires it to develop methodologies of financial assessment of Polytechnic costs for which no overseas models exist. Its academic membership is still entirely from overseas, with inevitable repercussions on its ability to arrange adequate collective discussion and its reliance on its local secretariat who act as the Government's de facto Department of Higher Education.  相似文献   
162.
Misconceptions about climate change science are pervasive among the US public. This study investigated the possibility that these misconceptions may be reflective of science teachers’ knowledge and teaching of climate change science. Florida and Puerto Rico secondary science teachers who claim to teach extensively about climate change were surveyed in regard to their conceptions of climate change science and the climate change-related topics they teach. Results show that many teachers hold naïve views about climate change (e.g. that ozone layer depletion is a primary cause of climate change) and climate change science (e.g. that it must be based on controlled experiments for it to be valid). In addition, teachers in both groups neglect crucial topics such as how evidence for climate change is developed and the social, political, and economic dimensions of climate change. Our results suggest the need for teachers to understand how to teach climate change and the nature of climate change science using authentic contexts that promote effective socioscientific decision-making and climate change mitigation.  相似文献   
163.
164.
165.
ABSTRACT

Using samples of novice and advanced consultants in training (CITs), this study explored the development of consultation self-efficacy (CSE) for both process-oriented and problem-oriented aspects of consultation. Regardless of experience level, self-efficacy in both domains increased with training. However, significantly greater gains were made by novice CITs as compared to their advanced counterparts. In addition, feedback collected from consultees was generally favorable, and consultants received high ratings on items that reflected both process- and problem-focused skills. Implications for consultation training are discussed.  相似文献   
166.
This study describes the development of emotional and behavioral regulation in a regional cohort of children born extremely preterm (<28 weeks gestational age, n = 39), very preterm (<34 weeks gestational age, n = 56), and full term (n = 103). At 2 and 4 years, children born at younger gestational ages demonstrated poorer self-regulation across multiple contexts spanning observed interactions, formal cognitive testing, and parental report of child behavior at home. Among children born preterm, the 2 strongest predictors of impairments in self-regulation were the presence of moderate-to-severe cerebral white matter abnormalities on neonatal magnetic resonance and a less sensitive parenting style when children were aged 2 years. Findings support the importance of early neurological development and parenting for developing regulation in children born very preterm.  相似文献   
167.
Studies have acknowledged children not as climate change victims only, but also as climate change actors. However, only a few have addressed the preparatory stages of children as climate change actors. However, the few studies that addressed these preparatory stages gave attention only to the roles of schools and government agencies without adequate attention to that of parents. This article therefore attempts to discuss the role of eco-parenting in building mitigation and adaptation capacities in children. Relying on the authoritative parenting model, the article avers that eco-parenting can have significant effects on children's ability to protect the environment, mitigate, and adapt to climate change impacts.  相似文献   
168.
169.
170.
Estimating treatment effects for subgroups defined by posttreatment behavior (i.e., estimating causal effects in a principal stratification framework) can be technically challenging and heavily reliant on strong assumptions. We investigate an alternative path: using bounds to identify ranges of possible effects that are consistent with the data. This simple approach relies on fewer assumptions and yet can result in policy-relevant findings. As we show, even moderately predictive covariates can be used to substantially tighten bounds in a straightforward manner. Via simulation, we demonstrate which types of covariates are maximally beneficial. We conclude with an analysis of a multisite experimental study of Early College High Schools. When examining the program's impact on students completing the ninth grade “on-track” for college, we find little impact for ECHS students who would otherwise attend a high-quality high school, but substantial effects for those who would not. This suggests a potential benefit in expanding these programs in areas primarily served by lower quality schools.  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