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   21201篇
  免费   290篇
  国内免费   123篇
教育   14490篇
科学研究   2707篇
各国文化   158篇
体育   1849篇
综合类   11篇
文化理论   147篇
信息传播   2252篇
  2021年   167篇
  2020年   304篇
  2019年   448篇
  2018年   599篇
  2017年   552篇
  2016年   553篇
  2015年   345篇
  2014年   455篇
  2013年   3660篇
  2012年   432篇
  2011年   476篇
  2010年   355篇
  2009年   355篇
  2008年   392篇
  2007年   416篇
  2006年   373篇
  2005年   366篇
  2004年   337篇
  2003年   324篇
  2002年   325篇
  2001年   360篇
  2000年   393篇
  1999年   381篇
  1998年   194篇
  1997年   192篇
  1996年   240篇
  1995年   219篇
  1994年   187篇
  1993年   189篇
  1992年   311篇
  1991年   305篇
  1990年   302篇
  1989年   357篇
  1988年   277篇
  1987年   285篇
  1986年   286篇
  1985年   337篇
  1984年   284篇
  1983年   275篇
  1982年   243篇
  1981年   222篇
  1980年   210篇
  1979年   306篇
  1978年   255篇
  1977年   229篇
  1976年   203篇
  1975年   158篇
  1974年   192篇
  1973年   165篇
  1971年   142篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
This article summarizes the findings of an NFER project which studied the roles, management and practices of LEA advisory services throughout England and Wales. The full report of the research (Stillman and Grant, 1988) will be published in January by NFER‐NELSON.  相似文献   
162.
163.
Although creativity and expertise are related, they are nonetheless very different things. Expertise does not usually require creativity, but creativity generally does require a certain level of expertise. There are similarities in the relationships of both expertise and creativity to domains, however. Research has shown that just as expertise in one domain does not predict expertise in other, unrelated domains, creativity in one domain does not predict creativity in other, unrelated domains. People may be expert, and people may be creative, in many domains, or they may be expert, or creative, in few domains or none at all, and one cannot simply transfer expertise, or creativity, from one domain to another, unrelated domain. The domain specificity of creativity matters crucially for creativity training, creativity assessment, creativity research, and creativity theory. The domain specificity of creativity also means that interdisciplinary thinking, interdisciplinary collaboration, and interdisciplinary creativity are even more important than one would assume if creativity were domain general.  相似文献   
164.
165.
166.
The problem of the construction of the optimal model of the automated control system of a Russian higher-education institution (the ACS of an RHEI) is studied. This term appeared in the 1970s–1980s and served as the beginning of a project that covered more than 50 of the largest higher-education institutions of the country and is also relevant today. Two main approaches to construction of an automated control system of Russian higher-education institutions are specified, viz., the development of a system using its own resources and the use of the product from a third-party developer. Examples of the application of these approaches are given and the structure of the elements (modules) of the systems is described. The necessity to search for the optimal structure of the elements included in the ACS of an RHEI is specified for most educational organizations taking their dimensions into account and their specific sectoral character, as well as the total expenditures for the acquisition (development) and support of the systems. An example of the structure of the optimal model and a third (combined) approach to its construction is given.  相似文献   
167.
168.
We conduct an analysis of 1835 pledges to 10 music production projects hosted on the largest Brazilian crowdfunding platform, namely the Catarse Web site, and we assess the relation between the fundraising accumulation period, the donor–entrepreneur distance and the propensity of donors to back projects. Our results suggest a significantly negative association between distance and the value of capital pledged to projects, which is consistent with the notion that the entrepreneur’s network of close contacts might play a central role in funding. Furthermore, our results contradict the idea that crowdfunding reduces the inhibiting effect of donor–entrepreneur distance. In addition, the results show that a long project exposure is associated with higher values of pledges. These results suggest practical implications for the study of crowdfunding as a financing platform. This study contributes to the literature on the use of crowdfunding as an alternative funding source in a major emerging market.  相似文献   
169.
Pornography use is often associated with less-progressive sex-role attitudes, such as endorsement of a sexual double standard between heterosexual partners, but the process by which this relationship occurs is still largely unexamined. The present study was conducted to examine how perceptions about pornography may play a role in the relationship between pornography use and sex-role attitudes. Perceived general acceptance and perceived influence of pornography on most people partially mediated the relationship between pornography use and sex-role attitudes. The more participants reported using pornography, the more they believed pornography was generally accepted and had a positive influence; however, conversely to what was hypothesized, the more positive they perceived pornography’s influence, the less likely they were to report sex-role attitudes that endorse a sexual double standard.  相似文献   
170.
K. R. Shivanna 《Resonance》2016,21(11):1007-1018
After the pollen grain reaches the stigma through outsourced agents (pollinators), the next step before fertilization is to select the right type of pollen. Similar to a marriage in human beings, fiowering plants also have evolved elaborate screening process to select the right pollen grains and to reject the wrong ones. Even after initial screening for the right pollen, the pistil imposes a tough competition amongst them, comparable to a swayamvara of Indian mythology, to select the best available pollen. Flowering plants have evolved into a matriarchal society. The selection of the male partner is totally the prerogative of the mother (pistil); the boy (pollen grain) and the girl (ovule) has no say in this selection.  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